269 places in San Francisco Bay Area area, California, each with its own live forecast and radar, and where a station sits close enough, measured weather records.
San Francisco Bay Area area has 269 places on myweatherrock (160 census-designated places, 95 cities, 14 towns), each with its own live forecast, hourly timeline, ten day outlook and radar. The hottest day in the station records is 121°F at Ben Lomond #4 on September 6, 2020. The coldest night is 7°F at Mt Hamilton on December 21, 1990. The wettest day brought 11.56 inches of rain at Kentfield on January 21, 1967. The biggest single-day snow measured 15.98 inches at Mt Hamilton on April 10, 1965. Those are station measurements from NOAA's daily records, 1893 to 2026, not official state records. By area the largest place is San Jose, about 178 square miles.
About San Francisco Bay Area area weather
The map on the Now tab shows every San Francisco Bay Area area town's current temperature from our own server, one dot per town. Tap any dot, or type a town above, for that town's full forecast.
What the weather is usually like
Across the 268 San Francisco Bay Area area towns with station normals, the warmest month is August, when the day usually reaches 80°F, and the coldest is December, when the night usually falls to 41°F. January is the wettest, with rain on about 11 days. August afternoons run from about 63°F in Broadmoor to 96°F in Soledad. December nights run from about 32°F in Soledad to 47°F in Sausalito.
Means of the 1991 to 2020 station normals serving these towns, as published by NOAA; each town's page carries its own.
Where these numbers come from
Current conditions and forecast: NOAA forecast grids decoded on our own server, corrected against the nearest reporting station and our own radar. Open-Meteo is consulted only as a fallback when our server is silent.
Records: computed by myweatherrock from NOAA GHCN-Daily station records at the stations serving these towns. Measurements, not estimates.
Warnings and alerts: the National Weather Service, passed through unchanged.
San Francisco Bay Area area weather records
Hottest day
121°F
Ben Lomond #4, September 6, 2020
Coldest night
7°F
Mt Hamilton, December 21, 1990
Wettest day
11.56 in
Kentfield, January 21, 1967
Biggest snow
15.98 in
Mt Hamilton, April 10, 1965
Measured at the NOAA stations serving these towns, daily records 1893 to 2026. Station extremes, not official state records.
Common questions about San Francisco Bay Area area weather
What is the hottest temperature recorded at a San Francisco Bay Area area station?
121°F at Ben Lomond #4 on September 6, 2020, in the NOAA daily station records myweatherrock holds (1893 to 2026).
What is the coldest temperature recorded at a San Francisco Bay Area area station?
7°F at Mt Hamilton on December 21, 1990.
What is the most rain a San Francisco Bay Area area station has measured in one day?
11.56 inches at Kentfield on January 21, 1967.
What is the biggest one-day snowfall at a San Francisco Bay Area area station?
15.98 inches at Mt Hamilton on April 10, 1965.
How many San Francisco Bay Area area towns have a weather page here?
269: 160 census-designated places, 95 cities, 14 towns. Each page carries current conditions, the hourly timeline, the ten day outlook, radar, and where a station sits close enough, measured records.
Where does the San Francisco Bay Area area forecast come from?
NOAA forecast grids (the National Weather Service digital forecast, the National Blend of Models, HRRR and GFS) decoded on our own server, corrected against the nearest reporting station and our own radar. Open-Meteo is consulted only as a fallback when our server is silent.
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