San Francisco Weather and Climate
San Francisco has a warm-summer Mediterranean atmosphere (Köppen Csb) normal for California's drift, with sodden gentle winters and dry summers.San Francisco's climate is unequivocally affected by the cool streams of the Pacific Ocean on the west side of the city, and the water of San Francisco Bay toward the north and east. This conservatives temperature swings and delivers a strikingly mellow year-round atmosphere with minimal regular temperature variety.
Mist is a standard component of San Francisco summers.
Among major U.S. urban communities, San Francisco has the coolest every day mean, most extreme, and least temperatures for June, July, and August. Amid the late spring, rising hot air in California's inside valleys makes a low weight territory that draws winds from the North Pacific High through the Golden Gate, which makes the city's trademark cool winds and fog.The mist is less articulated in eastern neighborhoods and amid the late summer and early fall, which is the hottest time.
As a result of its sharp geology and sea impacts, San Francisco shows a large number of particular microclimates. The high slopes in the geographic focal point of the city are in charge of a 20% change in yearly precipitation between various parts of the city. They likewise shield neighborhoods straightforwardly to their east from the foggy and once in a while extremely icy and blustery conditions experienced in the Sunset District; for the individuals who live on the eastern side of the city, San Francisco is sunnier, with a normal of 260 sunny mornings, and just 105 overcast days for every year.
Temperatures reach or surpass 80 °F (27 °C) on a normal of just 21 and 23 days a year at downtown and San Francisco International Airport (SFO), respectively.The dry time of May to October is gentle to warm, with the typical month to month mean temperature cresting in September at 62.7 °F (17.1 °C).The stormy time of November to April is somewhat cooler, with the ordinary month to month mean temperature achieving its most reduced in January at 51.3 °F (10.7 °C).On normal, there are 73 blustery days a year, and yearly precipitation midpoints 23.65 inches (601 mm).Variation in precipitation from year to year is high. Better than expected rain years are regularly connected with warm El Niño conditions in the Pacific while dry years frequently happen in icy water La Niña periods. In 2013 (a "La Niña" year), a record low 5.59 in (142 mm) of precipitation was recorded at downtown San Francisco, where records have been kept since 1849.Snowfall in the city is exceptionally uncommon, with just 10 quantifiable collections recorded since 1852, most as of late in 1976 when up to 5 inches (130 mm) fell on Twin Peaks.
The most noteworthy recorded temperature at the official National Weather Service office was 103 °F (39 °C) on July 17, 1988, and June 14, 2000. The most reduced recorded temperature was 27 °F (−3 °C) on December 11, 1932.The National Weather Service gives a supportive visual guide charting the data in the table underneath to show outwardly by month the yearly common temperatures, the previous year's temperatures, and record temperatures.
San Francisco falls under the USDA 10a Plant Hardiness zone.