San Jose, California

=== Climate ===
San Jose, like most of the Bay Area, has a [[Mediterranean climate]] ([[Köppen climate classification|Köppen]] ''[[Hot-summer mediterranean|Csa]]''),<ref name="WR-259">{{cite web |url=http://www.wrh.noaa.gov/mtr/sfd_sjc_climate/sjc/SJC_CLIMATE3.php |title=Climate of San Jose |author=Miguel Miller |access-date=June 18, 2007 |publisher=National Weather Service |archive-url=https://web.archive.org/web/20041215213648/http://www.wrh.noaa.gov/mtr/sfd_sjc_climate/sjc/SJC_CLIMATE3.php |archive-date=December 15, 2004 |url-status=live }}</ref> with warm to hot, dry summers and cool, wet winters. San Jose has an average of 298 days of sunshine and an annual mean temperature of {{cvt|60.5|°F|1}}. It lies inland, surrounded on three sides by mountains, and does not front the Pacific Ocean like San Francisco. As a result, the city is somewhat more sheltered from rain, giving it a [[semi-arid climate|semi-arid]] feel with a mean annual rainfall of {{cvt|15.82|in|1|disp=or}}, compared to some other parts of the Bay Area, which can receive about three times that amount.{{citation needed|date=April 2023}}

Like most of the Bay Area, San Jose is made up of dozens of [[microclimate]]s. Because of a more prominent rain shadow from the Santa Cruz Mountains, Downtown San Jose experiences the lightest rainfall in the city, while South San Jose, only {{cvt|10|mi}} distant, experiences more rainfall, and somewhat more extreme temperatures. San Jose barely avoids a [[cold semi-arid climate|temperate steppe]] (BSk) climate.{{citation needed|date=April 2023}}

The monthly daily average temperature ranges from around {{cvt|50|°F}} in December and January to around {{cvt|70|°F|1}} in July and August.<ref name="http://www.wrcc.dri.edu/cgi-bin/cliMAIN.pl?casjos">{{cite web |url=http://www.accuweather.com/us/ca/san-jose/95113/forecast-month.asp |title=San Jose Month Weather |publisher=AccuWeather |archive-url=https://web.archive.org/web/20111117201046/http://www.accuweather.com/us/ca/san-jose/95113/forecast-month.asp |archive-date=November 17, 2011}}</ref> The highest temperature ever recorded in San Jose was {{cvt|109|°F|C}} on September 6, 2022; the lowest was {{cvt|19|°F|1}} on December 22–23, 1990. On average, there are 2.7 mornings annually where the temperature drops to, or below, the freezing mark; and sixteen afternoons where the high reaches or exceeds {{cvt|90|°F|1|disp=or}}. [[Diurnal temperature variation]] is far wider than along the coast or in San Francisco but still a shadow of what is seen in the [[Central Valley (California)|Central Valley]].

{{Weather box
| location = San Jose, California (1991–2020 normals, extremes 1893–present)
| single line = Y
| Jan record high F = 79
| Feb record high F = 81
| Mar record high F = 89
| Apr record high F = 95
| May record high F = 102
| Jun record high F = 107
| Jul record high F = 108
| Aug record high F = 105
| Sep record high F = 109
| Oct record high F = 101
| Nov record high F = 85
| Dec record high F = 79
| year record high F = 
| Jan avg record high F = 68.2
| Feb avg record high F = 73.2
| Mar avg record high F = 79.1
| Apr avg record high F = 85.7
| May avg record high F = 89.8
| Jun avg record high F = 96.9
| Jul avg record high F = 95.0
| Aug avg record high F = 95.7
| Sep avg record high F = 95.7
| Oct avg record high F = 89.4
| Nov avg record high F = 77.5
| Dec avg record high F = 68.0
| year avg record high F = 99.8
| Jan high F = 59.0
| Feb high F = 62.8
| Mar high F = 66.4
| Apr high F = 70.0
| May high F = 74.9
| Jun high F = 80.1
| Jul high F = 82.2
| Aug high F = 82.7
| Sep high F = 81.4
| Oct high F = 74.6
| Nov high F = 65.0
| Dec high F = 58.8
| year high F = 71.5
| Jan mean F = 51.1
| Feb mean F = 54.1
| Mar mean F = 57.0
| Apr mean F = 59.9
| May mean F = 64.1
| Jun mean F = 68.5
| Jul mean F = 70.6
| Aug mean F = 71.2
| Sep mean F = 69.8
| Oct mean F = 64.2
| Nov mean F = 56.1
| Dec mean F = 50.8
| year mean F = 61.4
| Jan low F = 43.3
| Feb low F = 45.4
| Mar low F = 47.6
| Apr low F = 49.8
| May low F = 53.3
| Jun low F = 57.0
| Jul low F = 59.1
| Aug low F = 59.8
| Sep low F = 58.2
| Oct low F = 53.8
| Nov low F = 47.2
| Dec low F = 42.8
| year low F = 51.4
| Jan avg record low F = 32.6
| Feb avg record low F = 35.0
| Mar avg record low F = 38.1
| Apr avg record low F = 41.3
| May avg record low F = 46.1
| Jun avg record low F = 50.1
| Jul avg record low F = 53.8
| Aug avg record low F = 53.9
| Sep avg record low F = 50.8
| Oct avg record low F = 45.5
| Nov avg record low F = 36.8
| Dec avg record low F = 32.2
| year avg record low F = 30.7
| Jan record low F = 18
| Feb record low F = 24
| Mar record low F = 25
| Apr record low F = 26
| May record low F = 32
| Jun record low F = 33
| Jul record low F = 40
| Aug record low F = 39
| Sep record low F = 35
| Oct record low F = 30
| Nov record low F = 21
| Dec record low F = 19
| year record low F = 18
| rain colour = green
| Jan rain inch = 2.97
| Feb rain inch = 3.24
| Mar rain inch = 2.64
| Apr rain inch = 1.24
| May rain inch = 0.54
| Jun rain inch = 0.17
| Jul rain inch = 0.01
| Aug rain inch = 0.03
| Sep rain inch = 0.07
| Oct rain inch = 0.80
| Nov rain inch = 1.36
| Dec rain inch = 3.07
| year rain inch = 16.14
| unit rain days = 0.01 in
| Jan rain days = 10.2
| Feb rain days = 11.5
| Mar rain days = 9.3
| Apr rain days = 6.4
| May rain days = 4.0
| Jun rain days = 1.2
| Jul rain days = 0.2
| Aug rain days = 0.4
| Sep rain days = 0.9
| Oct rain days = 2.7
| Nov rain days = 6.9
| Dec rain days = 10.7
| source 1 = [[NOAA]]<ref name="San Jose Weatherbox NOAA txt">{{cite web |url=https://www.ncei.noaa.gov/access/services/data/v1?dataset=normals-monthly-1991-2020&startDate=0001-01-01&endDate=9996-12-31&stations=USC00047821&format=pdf |publisher=National Oceanic and Atmospheric Administration |title=Summary of Monthly Normals 1991–2020 |access-date=May 13, 2021 |archive-date=May 13, 2021 |archive-url=https://web.archive.org/web/20210513034542/https://www.ncei.noaa.gov/access/services/data/v1?dataset=normals-monthly-1991-2020&startDate=0001-01-01&endDate=9996-12-31&stations=USC00047821&format=pdf |url-status=live }}</ref><ref>{{cite web
 |url = https://w2.weather.gov/climate/xmacis.php?wfo=mtr
 |title = NOWData – NOAA Online Weather Data
 |publisher = [[National Oceanic and Atmospheric Administration]]
 |access-date = February 27, 2019
 |archive-date = April 18, 2019
 |archive-url = https://web.archive.org/web/20190418234102/https://w2.weather.gov/climate/xmacis.php?wfo=mtr
 |url-status = live
 }}</ref>
| source = 
}}

"Rain year" precipitation has ranged from {{cvt|4.83|in|mm|1}} between July 1876 and June 1877 to {{cvt|30.30|in|mm|1}} between July 1889 and June 1890, although at the current site since 1893 the range is from {{cvt|5.33|in|mm|1}} in "rain year" 2020–21 to {{cvt|30.25|in|mm|1}} in "rain year" 1982–83. 2020-2021 was the lowest precipitation year ever, in 127 years of precipitation records in San Jose. The most precipitation in one month was {{cvt|12.38|in|mm|1}} in January 1911. The maximum 24-hour rainfall was {{cvt|3.60|in|1}} on January 30, 1968. On August 16, 2020, one of the most widespread and strong thunderstorm events in recent Bay Area history occurred as an unstable humid air mass moved up from the south and triggered multiple dry thunderstorms <ref>{{cite web|url=https://w1.weather.gov/glossary/index.php?word=dry+thunderstorm|title=Glossary - NOAA's National Weather Service|first=NOAA's National Weather|last=Service|website=w1.weather.gov|access-date=July 3, 2021|archive-date=July 9, 2021|archive-url=https://web.archive.org/web/20210709182609/https://w1.weather.gov/glossary/index.php?word=dry+thunderstorm|url-status=live}}</ref> which caused many fires to be ignited by 300+ lightning strikes in the surrounding hills. The CZU lightning complex fires took almost 5 months to fully be controlled. Over 86,000 acres were burned and nearly 1500 buildings were destroyed.<ref>{{cite web|url = https://www.msn.com/en-us/weather/topstories/lightning-sparks-multiple-fires-in-bay-area-santa-cruz-mountains/ar-BB181B0t|title = Lightning sparks multiple fires in Bay Area, Santa Cruz mountains|website = [[MSN]]|access-date = July 3, 2021|archive-date = July 9, 2021|archive-url = https://web.archive.org/web/20210709182715/https://www.msn.com/en-us/weather/topstories/lightning-sparks-multiple-fires-in-bay-area-santa-cruz-mountains/ar-BB181B0t|url-status = live}}</ref><ref>{{cite web|url=https://wildlandfirefighter.com/2021/05/04/cal-fire-czu-lightning-complex-lessons-learned/|title=CAL FIRE: CZU Lightning Complex, Lessons Learned – the Wildland Firefighter|date=May 4, 2021|access-date=July 3, 2021|archive-date=July 9, 2021|archive-url=https://web.archive.org/web/20210709183001/https://wildlandfirefighter.com/2021/05/04/cal-fire-czu-lightning-complex-lessons-learned/|url-status=live}}</ref>

The snow level drops as low as {{cvt|4000|ft|-1}} above sea level, or lower, occasionally coating nearby [[Mount Hamilton (California)|Mount Hamilton]] and, less frequently, the [[Santa Cruz Mountains]], with snow that normally lasts a few days. Snow will snarl traffic traveling on [[California State Route 17|State Route 17]] towards [[Santa Cruz, California|Santa Cruz]]. Snow rarely falls in San Jose; the most recent snow to remain on the ground was on February 5, 1976, when many residents around the city saw as much as {{cvt|3|in|m}} on car and roof tops. The official observation station measured only {{cvt|0.5|in|m}} of snow.<ref>{{cite web
 |url = http://www.wrcc.dri.edu/cgi-bin/cliMONtsnf.pl?casjos
 |title = Monthly Total Snowfall (Inches)
 |publisher = Western Regional Climate Center
 |date = July 24, 2006
 |access-date = June 12, 2013
 |archive-url = https://web.archive.org/web/20140629135724/http://www.wrcc.dri.edu/cgi-bin/cliMONtsnf.pl?casjos
 |archive-date = June 29, 2014
 |url-status = live
 }}</ref>
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