Weather without the clutter.
Get the San Francisco CA weather forecast without ads, cookies, or tracking. Open-Meteo data, 10-day forecast, hourly conditions, and radar — all free. click here to hide this
September is the hottest month in San Francisco CA, with an average high of 74°F / 23°C; January is the coldest (58°F / 14°C). December is the wettest month, averaging 3.9 in / 98 mm of precipitation.
| Month | High °F / °C | Low °F / °C | Precip in / mm | Wet days |
|---|---|---|---|---|
| Jan | 58 / 14 | 42 / 6 | 2.7 / 68 | 8 |
| Feb | 60 / 16 | 45 / 7 | 3.1 / 78 | 8 |
| Mar | 63 / 17 | 47 / 9 | 2.6 / 66 | 8 |
| Apr | 65 / 19 | 49 / 10 | 1.5 / 38 | 5 |
| May | 68 / 20 | 53 / 11 | 0.5 / 12 | 2 |
| Jun | 71 / 22 | 55 / 13 | 0.2 / 4 | 1 |
| Jul | 71 / 22 | 57 / 14 | 0.0 / 0 | 0 |
| Aug | 72 / 22 | 57 / 14 | 0.0 / 0 | 0 |
| Sep | 74 / 23 | 56 / 13 | 0.1 / 3 | 0 |
| Oct | 72 / 22 | 52 / 11 | 0.9 / 23 | 2 |
| Nov | 64 / 18 | 46 / 8 | 1.8 / 45 | 5 |
| Dec | 58 / 14 | 43 / 6 | 3.9 / 98 | 8 |
Extremes since 1943: highest 122°F / 50°C (March 7, 2010), lowest 1°F / -17°C (September 23, 2009).
Daylight lasts about 14.6 hours in June and 9.4 hours in December.
Data: Meteostat — Metro Oakland International Airport, 1991–2020 averages.
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