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118-650: Juan José Domínguez (1736–1809), a Spanish soldier, arrived in San Diego , California , in 1769 with Fernando Rivera y Moncada and served with the Gaspar de Portolà expedition and, along with Junípero Serra , traveled to San Juan Capistrano , San Gabriel , and Monterey . In 1784, Dominguez was granted a concession of seventeen Spanish leagues , or 75,000 acres (300 km), from the Spanish Empire . Domínguez's original grazing permission stretched from present-day Compton to

236-424: A 40 mm (1.6 in) level. The third letter indicates the degree of summer heat: " a " represents an average temperature in the warmest month above 22 °C (72 °F), while " b " indicates the average temperature in the warmest month below 22 °C (72 °F). There is a "c" with 3 or less months' average temperature above 10 °C (50 °F), but this climate is rare and is very isolated. Under

354-867: A Csb climate because of its location inside the Alborz mountains . Winters in this zone are rainy and can be mild to chilly. Some locales in this zone experience some amount of snowfall, while others do not. Csb climates are found in northwestern Iberian Peninsula (namely Galicia and the Norte region and west coast of Portugal ), in coastal Northern California , in the Pacific Northwest (namely western Washington , western Oregon and southern portions of Vancouver Island in British Columbia ), in central Chile , in parts of southern Australia and in sections of southwestern South Africa . A few locations close to

472-456: A Mediterranean climate are near large bodies of water, temperatures are generally moderate, with a comparatively small range of temperatures between the winter low and summer high unlike (the relatively rare) dry-summer humid continental climates (although the daily diurnal range of temperature during the summer is large due to dry and clear conditions, except along the immediate coastlines). Temperatures during winter only occasionally fall below

590-589: A Voyage Between China and the North-Western Coast of America, Made in 1804" and Richard Henry Dana 's more substantial and convincing account, of his 1834–36 voyage, the classic Two Years Before the Mast . In 1846, the United States went to war against Mexico and sent a naval and land expedition to conquer Alta California . At first, they had an easy time of it, capturing the major ports including San Diego, but

708-579: A center of the emerging biotech industry and is home to telecommunications giant Qualcomm . San Diego had also grown in the tourism industry with the popularity of attractions such as the San Diego Zoo , SeaWorld San Diego , and Legoland California in Carlsbad . According to SDSU professor emeritus Monte Marshall, San Diego Bay is "the surface expression of a north-south-trending, nested graben ". The Rose Canyon and Point Loma fault zones are part of

826-594: A century of intensive agriculture. Much of the Overberg in the southern Cape of South Africa , was once covered with renosterveld , but has likewise been largely converted to agriculture, mainly for wheat . In hillside and mountainous areas, away from the urban sprawls , ecosystems and habitats of native vegetation are more sustained and undisturbed. The fynbos vegetation in the South-western Cape in South Africa

944-661: A few kilometres inland. Occasionally also termed the "cool-summer Mediterranean climate", this subtype of the Mediterranean climate ( Csb ) is less common and experience warm (but not hot) and dry summers, with no average monthly temperatures above 22 °C (72 °F) during its warmest month and as usual an average in the coldest month between 18 and −3 °C (64 and 27 °F) or, in some applications, between 18 and 0 °C (64 and 32 °F). Also, at least four months must average above 10 °C (50 °F). Cool ocean currents, upwelling and higher latitudes are often

1062-496: A given planning area there may be several distinct neighborhoods. Altogether the city contains more than 100 identified neighborhoods . Downtown San Diego is located on San Diego Bay . Balboa Park encompasses several mesas and canyons to the northeast, surrounded by older, dense urban communities including Hillcrest and North Park . To the east and southeast lie City Heights , the College Area , and Southeast San Diego . To

1180-544: A mean temperature below 0 °C (32 °F) (or −3 °C [27 °F]), depending on the isotherm used). Regions in the Americas with this climate are influenced by the dry-summer trend (though briefly) that extends considerably poleward along the west coast, as well as the moderating influences of high altitude and relative proximity to the Pacific Ocean. These conditions maintain an unusually narrow temperature range through

1298-455: A number of small parks and preserves. San Diego County has one of the highest counts of animal and plant species that appear on the endangered list of counties in the United States. Because of its diversity of habitat and its position on the Pacific Flyway , San Diego County has recorded 492 different bird species, more than any other region in the country. San Diego always scores high in

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1416-649: A result of the Mexican–American War of 1846–48, the territory of Alta California, including San Diego, was ceded to the United States by Mexico, under the terms of the Treaty of Guadalupe Hidalgo in 1848. The Mexican negotiators of that treaty tried to retain San Diego as part of Mexico, but the Americans insisted that San Diego was "for every commercial purpose of nearly equal importance to us with that of San Francisco", and

1534-577: A river or creek flowed through it, and that they would lead our men to it if they would follow." That river was the San Diego River. Several reservoirs and Mission Trails Regional Park also lie between and separate developed areas of the city. Notable peaks within the city limits include Cowles Mountain , the highest point in the city at 1,591 feet (485 m); Black Mountain at 1,558 feet (475 m); and Mount Soledad at 824 feet (251 m). The Cuyamaca Mountains and Laguna Mountains rise to

1652-540: A season earlier than at the Dead Sea . In the Holy Land no rain at all falls in summer but early rains may come in autumn. The majority of the regions with Mediterranean climates have relatively mild winters and very warm summers. However, winter and summer temperatures can vary greatly between different regions with a Mediterranean climate. For instance, in the case of winters, Funchal experiences mild to warm temperatures in

1770-490: A toolbox. There are several new high-rises under construction , including two that exceed 400 feet (122 m) in height. The city had a population of 1,307,402 according to the 2010 census, distributed over a land area of 372.1 square miles (963.7 km ). The urban area of San Diego had a total population of 2,956,746, making it the third-largest in the state, after those of Los Angeles and San Francisco . The 2010 population represented an increase of just under 7% from

1888-599: A variety of elected and appointed offices in Los Angeles. For many years, a portion of the Rancho San Pedro land grant was contested between the Domínguez and Sepúlveda families through various appeals to Spanish Governors and lawsuits from 1817–1883 and was eventually partitioned into seventeen parcels in 1882. The Sepúlveda family was awarded 31,629 acres (128 km) known as Rancho de los Palos Verdes that later became

2006-597: A yearly cycle in which abiotic (environmental) controls of stream populations and community structure dominate during floods, biotic components (e.g. competition and predation) controls become increasingly important as the flood discharge declines, and environmental controls regain dominance as environmental conditions become very harsh (i.e. hot and dry); as a result, these communities are well suited to recover from droughts , floods , and fires . Aquatic organisms in these regions show distinct long-term patterns in their structure and function, and are also highly sensitive to

2124-524: Is a city on the Pacific coast of Southern California , immediately adjacent to the Mexico–United States border . With a population of over 1.3 million residents, it is the eighth-most populous city in the United States and the second-most populous in the state of California , after Los Angeles . San Diego is the seat of San Diego County , which has a population of nearly 3.3 million people. It

2242-424: Is closely associated with Mediterranean climate zones, as are unique freshwater communities, though vegetation native to the Mediterranean climate zone can also be found in the approximate nearby climate zones, which usually tend to be the humid subtropical , oceanic and/or semi-arid zones, depending on the region and location. Particularly distinctive of the climate are sclerophyll shrublands, called maquis in

2360-559: Is famed for its high floral diversity , and includes such plant types as members of the Restionaceae , Ericas (Heaths) and Proteas . Representatives of the Proteaceae also grow in Australia, such as Banksias . The palette of California native plants is also renowned for its species and cultivar diversity. This subtype of the Mediterranean climate ( Csa ) is the most common form of

2478-406: Is higher, steppe climates tend to prevail, but still follow the basic pattern of the Mediterranean climates. Irregularity of the rainfall, which can vary considerably from year to year, accentuates the droughts of the Mediterranean climate. Rain does not fall evenly, nor does the rain arrive at the same time or within the same intervals. In Gibraltar , for instance, rain starts falling nearly half

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2596-561: Is known for its mild year-round Mediterranean climate , extensive beaches and parks , long association with the United States Navy , and its recent emergence as a healthcare and biotechnology development center. Historically home to the Kumeyaay people, San Diego has been referred to as the Birthplace of California , as it was the first site visited and settled by Europeans on what

2714-539: Is mostly because of the city's topography (the Bay, and the numerous hills, mountains, and canyons). Frequently, particularly during the "May gray/ June gloom " period, a thick " marine layer " cloud cover keeps the air cool and damp within a few miles of the coast, but yields to bright cloudless sunshine approximately 5–10 miles (8–16 km) inland. Sometimes the June gloom lasts into July, causing cloudy skies over most of San Diego for

2832-545: Is now the West Coast of the United States . Upon landing in San Diego Bay in 1542, Juan Rodríguez Cabrillo claimed the area for Spain , forming the basis for the settlement of Alta California 200 years later. The Presidio and Mission San Diego de Alcalá , founded in 1769, formed the first European settlement in what is now California. In 1821, San Diego became part of the newly declared Mexican Empire , which reformed as

2950-473: Is the busiest single-runway airport in the United States. San Diego's name can be traced back to the 16th century when Spanish explorer Sebastián Vizcaíno bestowed it upon the area in 1602. He named the bay and the surrounding area "San Diego de Alcalá" in honor of Saint Didacus of Alcalá . Prior to the Spanish establishment of San Diego, the Kumeyaay town was called Kosa'aay , meaning "drying out place" in

3068-499: The First Mexican Republic two years later. California was conquered by the U.S. in 1848 following the Mexican–American War and was admitted as the 31st state in 1850. The largest sectors of the economy of San Diego include military and defense-related activities, tourism, international trade, research, and manufacturing. The city is home to several universities, including UC San Diego , San Diego State University , and

3186-958: The Gaslamp Quarter . In the early part of the 20th century, San Diego hosted the World's Fair twice: the Panama–California Exposition in 1915 and the California Pacific International Exposition in 1935. Both expositions were held in Balboa Park , and many of the Spanish/Baroque-style buildings that were built for those expositions remain to this day as central features of the park. The buildings were intended to be temporary structures, but most remained in continuous use until they progressively fell into disrepair. Most were eventually rebuilt, using castings of

3304-558: The Kumeyaay language . After the establishment of San Diego, the Kumeyaay called town and city Tepacul Watai , meaning "Stacked Big". Luiseño speakers in the North County region called it Pushuyi . What has been referred to as the San Dieguito complex was established in the area at least 9,000 years ago. The Kumeyaay may have culturally evolved from this complex or migrated into

3422-595: The Köppen climate classification , "hot dry-summer" climates (classified as Csa ) and "cool dry-summer" climates (classified as Csb ) are often referred to as just "Mediterranean". Under the Köppen climate system, the first letter indicates the climate group (in this case temperate climates). Temperate climates or " C " zones average temperature above 0 °C (32 °F) (or −3 °C (27 °F)), but below 18 °C (64 °F), in their coolest months. The second letter indicates

3540-443: The Mexico–United States border , and are physically separated from the rest of the city by the cities of National City and Chula Vista . A narrow strip of land at the bottom of San Diego Bay connects these southern neighborhoods with the rest of the city. For the most part, San Diego neighborhood boundaries tend to be understood by its residents based on geographical boundaries like canyons and street patterns. The city recognized

3658-674: The San Andreas Fault system. About 40 miles (64 km) east of the bay are the Laguna Mountains in the Peninsular Ranges , which are part of the American Cordillera . The city lies on approximately 200 deep canyons and hills separating its mesas , creating small pockets of natural open space scattered throughout the city and giving it a hilly geography. Traditionally, San Diegans have built their homes and businesses on

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3776-668: The San Pasqual Valley , which holds an agricultural preserve. Carmel Valley and Del Mar Heights occupy the northwest corner of the city. To their south are Torrey Pines State Natural Reserve and the business center of the Golden Triangle . Further south are the beach and coastal communities of La Jolla , Pacific Beach , Mission Beach , and Ocean Beach . Point Loma occupies the peninsula across San Diego Bay from downtown. The communities of South San Diego (an Exclave ), such as San Ysidro and Otay Mesa , are located next to

3894-698: The University of San Diego . San Diego is the economic center of the San Diego–Tijuana region, the second-most populous transborder metropolitan area in the Western Hemisphere, home to an estimated five million people as of 2022. The primary border crossing between San Diego and Tijuana , the San Ysidro Port of Entry , is the busiest international land border crossing in the world outside of Asia ( fourth-busiest overall). San Diego International Airport

4012-710: The garrigue or maquis in the European Mediterranean Basin, the chaparral in California, the fynbos in South Africa , the mallee in Australia, and the matorral in Chile. Areas with this climate are also where the so-called "Mediterranean trinity" of major agricultural crops have traditionally been successfully grown ( wheat , grapes and olives ). As a result, these regions are notable for their high-quality wines, grapeseed/olive oils, and bread products. Under

4130-415: The subtropical ridge migrates towards the equator and leaves the area, making rainfall much more likely. As a result, areas with this climate receive almost all of their precipitation during their winter and spring seasons, and may go anywhere from four to six months during the summer and early fall without having any significant precipitation . In the lower latitudes, precipitation usually decreases in both

4248-524: The 1,223,400 people reported in 2000. The population density was 3,771.9 inhabitants per square mile (1,456.3/km ). The racial makeup of San Diego was 58.9% White , 6.7% African American, 0.6% Native American, 15.9% Asian (5.9% Filipino , 2.7% Chinese , 2.5% Vietnamese , 1.3% Indian , 1.0% Korean , 0.7% Japanese , 0.4% Laotian , 0.3% Cambodian , 0.1% Thai ). 0.5% Pacific Islander (0.2% Guamanian , 0.1% Samoan , 0.1% Native Hawaiian ), 12.3% from other races , and 5.1% from two or more races. 28.8% of

4366-592: The Andes in Northern Ecuador , Peru , Colombia , and Western Venezuela . The cold-summer subtype of the Mediterranean climate ( Csc ) is rare and predominantly found at scattered high-altitude locations along the west coasts of North and South America having a similar climate. This type is characterized by cool, dry summers, with less than four months with a mean temperature at or above 10 °C (50 °F), as well as with cool, wet winters, with no winter month having

4484-558: The Atlantic portions of Iberia and Northwest Africa, the Pacific portions of the United States and Chile, extreme west areas of Argentina, around Cape Town in South Africa, parts of Southwest and South Australia , and parts of Central Asia . They tend to be found in proximity (both poleward and near the coast) of desert and semi-arid climates , and equatorward of oceanic climates . Mediterranean climate zones are typically located along

4602-590: The Californios in southern Alta California struck back. Following the successful revolt in Los Angeles , the American garrison at San Diego was driven out without firing a shot in early October 1846. Mexican partisans held San Diego for three weeks until October 24, 1846, when the Americans recaptured it. For the next several months the Americans were blockaded inside the pueblo. Skirmishes occurred daily and snipers shot into

4720-675: The Colorado River and the depot fell into disuse. From 1857 to 1860, San Diego became the western terminus of the San Antonio-San Diego Mail Line , the earliest overland stagecoach and mail operation from the Eastern United States to California, coming from Texas through New Mexico Territory in less than 30 days. In the late 1860s, Alonzo Horton promoted a move to the bayside area, which he called "New Town" and which became downtown San Diego . Horton promoted

4838-399: The Köppen classification, dry-summer climates ( Csa , Csb ) usually occur on the western sides of continents. Csb zones in the Köppen system include areas normally not associated with Mediterranean climates but with Oceanic climates, such as much of the Pacific Northwest , much of southern Chile , parts of west-central Argentina , and parts of New Zealand . Additional highland areas in

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4956-662: The Mediterranean Basin, chaparral in California, matorral in Chile, fynbos in South Africa, and mallee and kwongan shrublands in Australia. Mediterranean vegetation shows a number of adaptations to drought , grazing , and frequent fire regimes. The small sclerophyllous leaves that characterize many of the perennial shrubs of this biome, help conserve water and prevent nutrient loss. The soils generally are of low fertility , and many plants have mutualistic relationships with nitrogen-fixing bacteria . Aquatic communities in Mediterranean climate regions are adapted to

5074-506: The Mediterranean climate typically experience hot, sometimes very hot and dry summers. Winters can be mild, cool or chilly, and some cities in this region receive somewhat regular snowfall (e.g. Kermanshah ), while others do not receive any (e.g. Casablanca ). Csa climates are mainly found around the Mediterranean Sea , southern Australia, southwestern South Africa , sections of Central Asia , northern sections of Iran and Iraq ,

5192-448: The Mediterranean climate, therefore it is also known as a "typical Mediterranean climate". As stated earlier, regions with this form of a Mediterranean climate experience average monthly temperatures in excess of 22.0 °C (71.6 °F) during its warmest month and an average in the coldest month between 18 and −3 °C (64 and 27 °F) or, in some applications, between 18 and 0 °C (64 and 32 °F). Regions with this form of

5310-485: The Mexican–American border was eventually established to be one league south of the southernmost point of San Diego Bay , so as to include the entire bay within the United States. The state of California was admitted to the United States in 1850. That same year San Diego was designated the seat of the newly established County of San Diego and was incorporated as a city. Joshua H. Bean , the last alcalde of San Diego,

5428-515: The Navy Coaling Station in Point Loma, and expanded greatly during the 1920s. By 1930, the city was host to Naval Base San Diego , Naval Training Center San Diego , San Diego Naval Hospital , Camp Matthews , and Camp Kearny (now Marine Corps Air Station Miramar ). The city was also an early center for aviation: as early as World War I, San Diego was proclaiming itself "The Air Capital of

5546-547: The Palos Verdes Peninsula but did not become a title to land until it was "re-granted" in 1822 in the Mexican era to Juan José's nephew and heir, Cristóbal Domínguez. Cristóbal died soon afterward, but his three sons settled on the ranch, building adobe homes . The following year Manuel Domínguez , eldest son of Cristóbal Domínguez, married María Engracia de Cota and commenced a successful career raising cattle and serving in

5664-561: The San Diego City and County had the fifth-largest homeless population among major cities in the United States, with 8,102 people experiencing homelessness. In the city of San Diego, 4,887 individuals were experiencing homelessness according to the 2020 count. A December 11, 2023 article in The San Diego Union-Tribune by Blake Nelson reports a notable decline in the homeless population in downtown San Diego, specifically in

5782-460: The San Diego region would face Kumeyaay raids in the late 1830s and the town itself would face raids in the 1840s. Americans gained an increased awareness of California, and its commercial possibilities, from the writings of two countrymen involved in the often officially forbidden, to foreigners, but economically significant hide and tallow trade, where San Diego was a major port and the only one with an adequate harbor: William Shaler 's "Journal of

5900-538: The Spanish settlement, making it the first settlement by Europeans in what is now the state of California. In July of the same year, Mission San Diego de Alcalá was founded by Franciscan friars under Serra. The mission became a site for a Kumeyaay revolt in 1775, which forced the mission to relocate six miles (10 km) up the San Diego River. By 1797, the mission boasted the largest native population in Alta California, with over 1,400 neophytes living in and around

6018-510: The West". The city was home to important airplane developers and manufacturers like Ryan Airlines (later Ryan Aeronautical ), founded in 1925, and Consolidated Aircraft (later Convair ), founded in 1923. Charles A. Lindbergh 's plane, the Spirit of St. Louis , was built in San Diego in 1927 by Ryan Airlines. During World War II , San Diego became a major hub of military and defense activity, due to

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6136-509: The abduction of Emma Goldman 's husband Ben Reitman and multiple riots . San Diego's proximity to Tijuana during the Mexican Revolution made this one of the most significant free speech fights during the Wobbly era. In 1916, the neighborhood of Stingaree , the original home of San Diego's first Chinatown and "Soapbox Row", was demolished by anti- vice campaigners to make way for

6254-415: The area around 1000 C.E. Archaeologist Malcolm Rogers hypothesized that the early cultures of San Diego were separate from the Kumeyaay, yet this claim is disputed, with others noting that it does not account for cultural evolution . Rogers later reevaluated his claims, yet they were influential in shaping historical tellings of early San Diego history. The Kumeyaay established villages scattered across

6372-531: The area for the Catholic Saint Didacus , a Spaniard more commonly known as San Diego de Alcalá . On November 12, 1602, the first Christian religious service of record in Alta California was conducted by Friar Antonio de la Ascensión, a member of Vizcaíno's expedition, to celebrate the feast day of San Diego. The permanent European colonization of both California and San Diego began in 1769 with

6490-427: The area heavily, and people and businesses began to relocate to New Town because its location on San Diego Bay was convenient to shipping. New Town soon eclipsed the original settlement, known to this day as Old Town , and became the economic and governmental heart of the city. Still, San Diego remained a relative backwater town until the arrival of a railroad connection in 1878. In 1884–1886, John J. Montgomery made

6608-563: The arrival of four contingents of Spaniards from New Spain and the Baja California peninsula. Two seaborne parties reached San Diego Bay: the San Carlos , under Vicente Vila and including as notable members the engineer and cartographer Miguel Costansó and the soldier and future governor Pedro Fages , and the San Antonio , under Juan Pérez . An initial overland expedition to San Diego from

6726-431: The average annual precipitation must not exceed 900 mm (35 in), as well as satisfying Köppen's precipitation requirements. [Chile] has four months of winter, no more, and in them, except when there is a quarter moon, when it rains one or two days, all the other days have such a beautiful sunshine that is not necessary to resort to fire. The summer is so temperate, with delicious airs, that man can go all day under

6844-465: The canneries, mostly staffed by immigrant fishermen from Japan , and later from the Portuguese Azores and Italy whose influence is still felt in neighborhoods like Little Italy and Point Loma . Due to rising costs and foreign competition, the last of the canneries closed in the early 1980s. Downtown San Diego was in decline in the 1960s and 1970s, but experienced some urban renewal since

6962-491: The center of San Diego. The first skyscraper over 300 feet (91 m) in San Diego was the El Cortez Hotel , built in 1927; it was the tallest building in the city until 1963. As time went on, multiple buildings claimed the title of San Diego's tallest skyscraper, including the 530 B Street and Symphony Towers . Currently the tallest building in San Diego is One America Plaza , standing 500 feet (150 m) tall, which

7080-416: The century and a half that records have been kept. In 1949 and 1967, snow remained on the ground for a few hours in higher locations like Point Loma and La Jolla . The other three occasions, in 1882, 1946, and 1987, involved flurries but no accumulation. On February 21, 2019, snow fell and accumulated in residential areas of the city, but none fell in the downtown area. Like much of Southern California ,

7198-434: The cities of the Palos Verdes Peninsula, as well as portions of Torrance and San Pedro. With the cession of California to the United States following the Mexican–American War , the 1848 Treaty of Guadalupe Hidalgo provided that the land grants would be honored. As required by the Land Act of 1851, a claim for Rancho San Pedro was filed with the Public Land Commission in 1852, and a patent for 43,119 acres (170 km)

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7316-403: The city's economy by focusing on research and science, as well as tourism. From the start of the 20th century through the 1970s, the American tuna fishing fleet and tuna canning industry were based in San Diego, "the tuna capital of the world". San Diego's first tuna cannery was founded in 1911, and by the mid-1930s the canneries employed more than 1,000 people. A large fishing fleet supported

7434-477: The city, hoping to spread plague in the city and effectively kill tens of thousands of civilians. The plan was scheduled to launch on September 22, 1945, but was not carried out because Japan surrendered five weeks earlier. After World War II, the military continued to play a major role in the local economy, but post- Cold War cutbacks took a heavy toll on the local defense and aerospace industries. The resulting downturn led San Diego leaders to seek to diversify

7552-428: The coast are prone to wildfire , and the rates of fire increased in the 20th century, due primarily to fires starting near the borders of urban and wild areas. San Diego's broad city limits encompass a number of large nature preserves, including Torrey Pines State Natural Reserve , Los Peñasquitos Canyon Preserve , and Mission Trails Regional Park . Torrey Pines State Natural Reserve and a coastal strip continuing to

7670-434: The cold current has a stabilizing effect on the surrounding air, further reducing the chances for rain, but often causing thick layers of marine fog that usually evaporates by mid-day. Similar to desert climates, in many Mediterranean climates there is a strong diurnal character to daily temperatures in the warm summer months due to strong solar heating during the day from sunlight and rapid cooling at night. In winter,

7788-432: The early 1980s, including the opening of Horton Plaza , the revival of the Gaslamp Quarter, and the construction of the San Diego Convention Center ; Petco Park opened in 2004. Outside of downtown, San Diego annexed large swaths of land and for suburban expansion to the north and control of the San Ysidro Port of Entry . As the Cold War ended, the military shrank and so did defense spending. San Diego has since become

7906-462: The east of the city, and beyond the mountains are desert areas. The Cleveland National Forest is a half-hour drive from downtown San Diego. Numerous farms are found in the valleys northeast and southeast of the city. Under the Köppen–Geiger climate classification system , the San Diego area has been variously categorized as having either a hot semi-arid climate ( BSh in the original classification and BSkn in modified Köppen classification with

8024-448: The ensuing Battle of San Pasqual , fought in the San Pasqual Valley which is now part of the city of San Diego, the Americans suffered their worst losses in the campaign. Subsequently, a column led by Lieutenant Gray arrived from San Diego, rescuing Kearny's battered and blockaded command. Stockton and Kearny went on to recover Los Angeles and force the capitulation of Alta California with the " Treaty of Cahuenga " on January 13, 1847. As

8142-536: The entire day. Even in the absence of June gloom, inland areas experience much more significant temperature variations than coastal areas, where the ocean serves as a moderating influence. Thus, for example, downtown San Diego averages January lows of 50 °F (10 °C) and August highs of 78 °F (26 °C). The city of El Cajon , just 12 miles (19 km) inland from downtown San Diego, averages January lows of 42 °F (6 °C) and August highs of 88 °F (31 °C). The average surface temperature of

8260-488: The fire, smoke resulted in a significant increase in emergency room visits due to asthma, respiratory problems, eye irritation, and smoke inhalation; the poor air quality caused San Diego County schools to close for a week. The October 2007 California wildfires destroyed some areas, particularly within Rancho Bernardo , as well as the nearby communities of Rancho Santa Fe and Ramona . The City of San Diego recognizes 52 individual areas as Community Planning Areas. Within

8378-455: The first controlled flights by an American in a heavier-than-air unpowered glider just south of San Diego at Otay Mesa, helping to pioneer a new science of aerodynamics. In 1912, San Diego was the site of a free speech fight between the Industrial Workers of the World and the city government who passed an ordinance forbidding the freedom of speech along an area of "Soapbox Row" that led to civil disobedience, vigilantism , police violence ,

8496-464: The flag of Castile , but possibly born in Portugal . Sailing his flagship San Salvador from Navidad , New Spain, Cabrillo claimed the bay for the Spanish Empire in 1542, and named the site "San Miguel". In November 1602, Sebastián Vizcaíno was sent to map the California coast. Arriving on his flagship San Diego , Vizcaíno surveyed the harbor and what are now Mission Bay and Point Loma and named

8614-557: The freezing point and snow is generally seldom seen. Summer temperatures can be cool to very hot, depending on the distance from a large body of water, elevation, and latitude, among other factors. Strong winds from inland desert regions can sometimes boost summer temperatures up, quickly increasing the risk of wildfires . Notable exceptions to the usual proximity from bodies of water, thus featuring extremely high summer temperatures and cooler winters, include south-eastern Turkey and northern Iraq ( Urfa , Erbil ), surrounded by hot deserts to

8732-424: The higher areas can receive 11–15 inches (280–380 mm) per year. Variability from year to year can be dramatic: in the wettest years of 1883/1884 and 1940/1941, more than 24 inches (610 mm) fell, whilst in the driest years there was as little as 3.2 inches (80 mm). The wettest month on record is December 1921 with 9.21 inches (234 mm). Snow in the city is rare, having been observed only six times in

8850-480: The historic period and presumably earlier as well, the river has shifted its flow back and forth between San Diego Bay and Mission Bay, and its fresh water was the focus of the earliest Spanish explorers. Miguel Costansó , a cartographer, wrote in 1769, "When asked by signs where the watering-place was, the Indians pointed to a grove which could be seen at a considerable distance to the northeast, giving to understand that

8968-460: The importance of its neighborhoods when it organized its 2008 General Plan around the concept of a "City of Villages". San Diego was originally centered on the Old Town district, but by the late 1860s the focus had shifted to the bayfront, in the belief that this new location would increase trade. As the "New Town" – present-day Downtown – waterfront location quickly developed, it eclipsed Old Town as

9086-673: The interior of northern California west of the Sierra Nevada , along the Wasatch Front in Utah , and inland areas of southern Oregon west of the Cascade Mountains . Southern California's coasts also experience hot summers due to the shielding effect of the Channel Islands . However, unshielded areas of that coastline can have warm-summer Mediterranean climates with hot-summer areas just

9204-432: The lowland areas, temperatures which can sometimes prohibit the growth of typical cold-sensitive Mediterranean plants. Some Spanish authors opt to use the term 'continental Mediterranean climate' ( Clima Mediterráneo Continentalizado ) for some regions with lower temperatures in winter than the coastal areas, but Köppen's Cs zones show no distinction as long as winter temperature means stay above freezing. Additionally,

9322-489: The majority of Mediterranean-climate regions and countries, but remain highly dependent on proximity to the ocean, altitude and geographical location. The dry summer climate is found throughout the warmer middle latitudes , affecting almost exclusively the western portions of continents in relative proximity to the coast. The climate type's name is in reference to the coastal regions of the Mediterranean Sea , which mostly share this type of climate, but it can also be found in

9440-425: The majority of San Diego's current area was originally occupied on the west by coastal sage scrub and on the east by chaparral , plant communities made up mostly of drought-resistant shrubs. The steep and varied topography and proximity to the ocean create a number of different habitats within the city limits, including tidal marsh and canyons . The chaparral and coastal sage scrub habitats in low elevations along

9558-425: The median is 9.6 inches (240 mm). The months of December through March supply most of the rain, with February the only month averaging 2 inches (51 mm) or more. The months of May through September tend to be almost completely dry. Although there are few wet days per month during the rainy period, rainfall can be heavy when it does fall. Rainfall is usually greater in the higher elevations of San Diego; some of

9676-413: The mesas, while leaving the urban canyons relatively wild. Thus, the canyons give parts of the city a segmented feel, creating gaps between otherwise proximate neighborhoods and contributing to a low-density, car-centered environment. The San Diego River runs through the middle of San Diego from east to west, creating a river valley that serves to divide the city into northern and southern segments. During

9794-558: The mission proper. Mission San Diego was the southern anchor in Alta California of the historic mission trail El Camino Real . Both the Presidio and the Mission are National Historic Landmarks . In 1821, Mexico won its independence from Spain , and San Diego became part of the Mexican territory of Alta California . In 1822, Mexico began its attempt to extend its authority over the coastal territory of Alta California. The fort on Presidio Hill

9912-559: The n denoting summer fog) or a hot-summer Mediterranean climate ( Csa ). San Diego's climate is characterized by warm, dry summers and mild winters, with most of the annual precipitation falling between December and March. The city has a mild climate year-round, with an average of 201 days above 70 °F (21 °C) and low rainfall (9–13 inches [230–330 mm] annually). The climate in San Diego, like most of Southern California, often varies significantly over short geographical distances, resulting in microclimates . In San Diego, this

10030-511: The north constitute one of only two locations where the rare species of Torrey Pine, Pinus torreyana , is found. Due to the steep topography that prevents or discourages building, along with some efforts for preservation, there are also a large number of canyons within the city limits that serve as nature preserves, including Switzer Canyon , Tecolote Canyon Natural Park, and Marian Bear Memorial Park in San Clemente Canyon , as well as

10148-416: The north lies Mission Valley and Interstate 8 . The communities north of the valley and freeway, and south of Marine Corps Air Station Miramar , include Clairemont , Kearny Mesa , Tierrasanta , and Navajo . Stretching north from Miramar are the northern suburbs of Mira Mesa , Scripps Ranch , Rancho Peñasquitos , and Rancho Bernardo . The far northeast portion of the city encompasses Lake Hodges and

10266-622: The number of bird species observed in the annual Christmas Bird Count , sponsored by the Audubon Society , and it is known as one of the "birdiest" areas in the United States. San Diego and its backcountry suffer from periodic wildfires. In October 2003, San Diego was the site of the Cedar Fire , at that time the largest wildfire in California over the past century. The fire burned 280,000 acres (1,100 km ), killed 15 people, and destroyed more than 2,200 homes. In addition to damage caused by

10384-401: The original façades to retain the architectural style. The menagerie of exotic animals featured at the 1915 exposition provided the basis for the San Diego Zoo . During the 1950s there was a citywide festival called Fiesta del Pacifico highlighting the area's Spanish and Mexican past. In the 2010s there was a proposal for a large-scale celebration of the 100th anniversary of Balboa Park, but

10502-510: The plans were abandoned when the organization tasked with putting on the celebration went out of business. The southern portion of the Point Loma peninsula was set aside for military purposes as early as 1852. Over the next several decades the Army set up a series of coastal artillery batteries and named the area Fort Rosecrans . Significant U.S. Navy presence began in 1901 with the establishment of

10620-447: The population was Hispanic or Latino (of any race); 24.9% of the total population was of Mexican heritage, 1.4% Spanish and 0.6% Puerto Rican . The median age of Hispanic residents was 27.5 years, compared to 35.1 years overall and 41.6 years among non-Hispanic whites; Hispanic San Diegans were the largest group under the age of 18, while non-Hispanic whites constituted 63.1% of population 55 and older. As of January 2019 ,

10738-562: The precipitation pattern (" s " represents dry summers). Köppen has defined a dry summer month as a month with less than 30 mm (1.2 in) of precipitation and as a month within the high-sun months of April to September, in the case of the Northern Hemisphere and October to March, in the case of the Southern Hemisphere, and it also must contain exactly or less than one-third that of the wettest winter month. Some, however, use

10856-592: The presence of so many military installations and defense manufacturers. The city's population grew rapidly during and after World War II, more than doubling between 1930 (147,995) and 1950 (333,865). During the final months of the war, the Japanese had a plan to target multiple U.S. cities for biological attack , starting with San Diego. The plan was called " Operation Cherry Blossoms at Night " and called for kamikaze planes filled with fleas infected with plague ( Yersinia pestis ) to crash into civilian population centers in

10974-519: The reason for this cooler type of Mediterranean climate. The other main reason for this cooler type is the altitude . For instance, Menton on the French coast has a Csa climate while Castellar, Alpes-Maritimes , the adjacent town just north of Menton, with an altitude between 100 and 1,382 m (328 and 4,534 ft), has a Csb climate instead. The village of Siah Bisheh in Northern Iran also has

11092-636: The recent effects of climate change . The native vegetation of Mediterranean climate lands must be adapted to survive long, hot summer droughts in summer and prolonged wet periods in winter. Mediterranean vegetation examples include the following: Many native vegetations in Mediterranean climate area valleys have been cleared for agriculture and farming. In places such as the Sacramento Valley and Oxnard Plain in California , draining marshes and estuaries combined with supplemental irrigation has led to

11210-424: The region, including the village of Kosa'aay which was the Kumeyaay village that the future settlement of San Diego would stem from in today's Old Town . The village of Kosa'aay was made up of thirty to forty families living in pyramid-shaped housing structures and was supported by a freshwater spring from the hillsides. The first European to visit the region was explorer Juan Rodríguez Cabrillo , sailing under

11328-419: The south and mountains to the north. Those places routinely experience summer daily means of over 30 °C (86 °F) and daily highs above 40 °C (104 °F), while receiving enough rainfall in winter not to fall into arid or semi-arid classifications. As in every climatologic domain, the highland locations of the Mediterranean domain can present cooler temperatures in the summer and winter than

11446-542: The south coast of England such as Weymouth and Portland just scrape into this climate classification due to very low rainfall in July. A trend towards slightly drier summers during the 1971–2000 climate average period, meant that this classification previously extended slightly further to include a few other weather stations in southern England, such as Bognor Regis and Teignmouth . Rarer instances of this climate can be found in relatively small and isolated high altitude areas of

11564-621: The south was led by the soldier Fernando Rivera and included the Franciscan missionary, explorer, and chronicler Juan Crespí , followed by a second party led by the designated governor Gaspar de Portolà and including the mission president (and now saint) Junípero Serra . In May 1769, Portolà established the Presidio of San Diego on a hill near the San Diego River above the Kumeyaay village of Cosoy, which would later become incorporated into

11682-450: The south, Central Avenue on the east, and Arlington Avenue on the west. After the death of Manuel Domínguez and his wife, the rancho was divided among their six surviving daughters. 33°46′12″N 118°19′12″W  /  33.770°N 118.320°W  / 33.770; -118.320 San Diego San Diego ( / ˌ s æ n d i ˈ eɪ ɡ oʊ / SAN dee- AY -goh , Spanish: [san ˈdjeɣo] )

11800-722: The subtropics also meet Cs requirements, though they, too, are not normally associated with Mediterranean climates. The same goes for a number of oceanic islands such as Madeira , the Juan Fernández Islands , the western part of the Canary Islands , and the eastern part of the Azores . Under Trewartha 's modified Köppen climate classification, the two major requirements for a Cs climate are revised. Under Trewartha's system, at least eight months must have average temperatures of 10 °C (50 °F) or higher ( subtropical ), and

11918-537: The sun. Poleward extension and expansion of the subtropical anticyclone over the oceans bring subsiding air to the region in summer, with clear skies and high temperatures. When the anticyclone moves Equator-ward in winter, it is replaced by traveling, frontal cyclones with their attendant precipitation. During summer, regions of the Mediterranean climate are strongly influenced by the subtropical ridge which keeps atmospheric conditions very dry with minimal cloud coverage. In some areas, such as coastal California ,

12036-457: The temperature and rainfall pattern for a Csa or even a Csb climate can exist as a microclimate in some high-altitude locations adjacent to a rare tropical As ( tropical savanna climate with dry summers, typically in a rainshadow region, as in Hawaii). These have a favourable climate, with mild wet winters and fairly warm, dry summers. The Mediterranean forests, woodlands, and scrub biome

12154-412: The threat of legal consequences appears to have played a role in the reduction. In 2000 there were 451,126 households, out of which 30.2% had children under the age of 18 living with them, 44.6% were married couples living together, 11.4% had a female householder with no husband present, and 39.8% were non-families. Households made up of individuals account for 28.0%, and 7.4% had someone living alone who

12272-562: The town every night. The Californios drove cattle away from the pueblo hoping to starve the Americans and their Californio supporters out. On December 1, the American garrison learned that the dragoons of General Stephen W. Kearney were at Warner's Ranch . Commodore Robert F. Stockton sent a mounted force of fifty under Captain Archibald Gillespie to march north to meet him. Their joint command of 150 men, returning to San Diego, encountered about 93 Californios under Andrés Pico . In

12390-674: The tropics, on Haleakalā Summit in Hawaii. In South America, Csc regions can be found along the Andes in Chile and Argentina. The town of Balmaceda, Chile is one of the few towns confirmed to have this climate. Small areas with a Csc climate can be found at high elevations in Corsica . In Norway, the small fishing village of Røstlandet , in Røst Municipality , above the Arctic Circle has

12508-481: The urban core. According to data from the Downtown San Diego Partnership, the number of individuals living outside or in vehicles has reached a two-year low, standing at approximately 1,200 as of last month. The decrease is attributed to the implementation of the city's camping ban and the concerted efforts to establish new shelters. While enforcement has led to relatively few individuals being punished,

12626-460: The vote. Beyond the town, Mexican land grants expanded the number of California ranchos that modestly added to the local economy. (See, List of pre-statehood mayors of San Diego .) However, San Diego had been losing population throughout the 1830s, due to increasing tension between the settlers and the indigenous Kumeyaay and in 1838 the town lost its pueblo status because its size dropped to an estimated 100 to 150 residents. The ranchos in

12744-544: The water at Scripps Pier in the California Current has increased by almost 3 °F (1.7 °C) since 1950, according to scientists at the Scripps Institution of Oceanography . Additionally, the mean minimum is now above 40 °F (4 °C), putting San Diego in hardiness zone 11, with the last freeze having occurred many decades ago. Annual rainfall along the coast averages 10.65 inches (271 mm) and

12862-452: The western coasts of landmasses, between roughly 30 and 45 degrees north or south of the equator . The main cause of Mediterranean, or dry summer, climate is the subtropical ridge , which extends towards the pole of the hemisphere in question during the summer and migrates towards the equator during the winter. This is due to the seasonal poleward-equatorward variations of temperatures. The resulting vegetation of Mediterranean climates are

12980-527: The winter and summer due to higher evapotranspiration . Toward the polar latitudes, total moisture usually increases; for instance, the Mediterranean climate in Southern Europe has more rain. The rainfall also tends to be more evenly distributed throughout the year in Southern Europe, while in places such as Southern California , the summer is nearly or completely dry. In places where evapotranspiration

13098-410: The winter, with frost and snowfall almost unknown, whereas Tashkent has cold winters with annual frosts and snowfall; or, to consider summer, Seville experiences rather high temperatures in that season. In contrast, San Francisco has cool summers with daily highs around 21 °C (70 °F) due to the continuous upwelling of cold subsurface waters along the coast. Because most regions with

13216-543: The year for climate zones at such distances from coasts. In North America, areas with Csc climate can be found in the Olympic , Cascade , Klamath , and Sierra Nevada ranges in Washington, Oregon and California. These locations are found at high altitude nearby lower altitude regions characterized by a warm-summer Mediterranean climate ( Csb ) or hot-summer Mediterranean climate ( Csa ). A rare instance of this climate occurs in

13334-619: Was 65 years of age or older. The average household size was 2.61, and the average family size was 3.30. Mediterranean climate A Mediterranean climate ( / ˌ m ɛ d ɪ t ə ˈ r eɪ n i ən / MED -ih-tə- RAY -nee-ən ), also called a dry summer climate , described by Köppen as Cs , is a temperate climate type that occurs in the lower mid-latitudes (normally 30 to 44 north and south latitude). Such climates typically have dry summers and wet winters, with summer conditions being hot and winter conditions typically being mild. These weather conditions are typically experienced in

13452-483: Was completed in 1991. The downtown skyline contains no supertall buildings due to a regulation put in place by the Federal Aviation Administration (FAA) in the 1970s, which set a 500 feet (152 m) limit on the height of buildings within a one-mile (1.6 km) radius of San Diego International Airport . An iconic description of the skyline includes its skyscrapers being compared to the tools of

13570-448: Was elected the first mayor. Two years later the city was bankrupt; the California legislature revoked the city's charter and placed it under control of a board of trustees, where it remained until 1889. A city charter was reestablished in 1889, and today's city charter was adopted in 1931. The original town of San Diego was located at the foot of Presidio Hill, in the area which is now Old Town San Diego State Historic Park . The location

13688-410: Was gradually abandoned, while the town of San Diego grew up on the level land below Presidio Hill. The Mission was secularized by the Mexican government in 1834 , and most of the Mission lands were granted to former soldiers. The 432 residents of the town petitioned the governor to form a pueblo , and Juan María Osuna was elected the first alcalde ("municipal magistrate"), defeating Pío Pico in

13806-479: Was granted to Manuel Domínguez and signed by President James Buchanan on December 18, 1858. A separate claim was filed by Nasario Domínguez in 1852 for 1/6 of the grant but it was rejected by the Commission in 1855. In 1869, Union Army Major General William Starke Rosecrans bought 16,000 acres (65 km). The "Rosecrans Rancho" was bordered by what later was Florence Avenue on the north, Redondo Beach Boulevard on

13924-440: Was not ideal, being several miles away from navigable water at its port at La Playa . In 1850, William Heath Davis promoted a new development by the bay shore called "New San Diego", several miles south of the original settlement; however, for several decades the new development consisted only of a pier, a few houses and an Army depot for the support of Fort Yuma . After 1854, the fort became supplied by sea and by steamboats on

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