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Get the San Jose 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 Jose CA, with an average high of 78°F / 26°C; December is the coldest (59°F / 15°C). February is the wettest month, averaging 2.8 in / 71 mm of precipitation.
| Month | High °F / °C | Low °F / °C | Precip in / mm | Wet days |
|---|---|---|---|---|
| Jan | 59 / 15 | 42 / 6 | 2.2 / 57 | 7 |
| Feb | 62 / 17 | 45 / 7 | 2.8 / 71 | 8 |
| Mar | 65 / 19 | 47 / 9 | 1.9 / 49 | 8 |
| Apr | 68 / 20 | 49 / 10 | 0.9 / 24 | 4 |
| May | 72 / 22 | 53 / 12 | 0.3 / 8 | 1 |
| Jun | 76 / 25 | 56 / 14 | 0.1 / 3 | 1 |
| Jul | 77 / 25 | 59 / 15 | 0.0 / 0 | 0 |
| Aug | 77 / 25 | 59 / 15 | 0.0 / 0 | 0 |
| Sep | 78 / 26 | 58 / 14 | 0.1 / 2 | 0 |
| Oct | 74 / 23 | 54 / 12 | 0.6 / 16 | 2 |
| Nov | 65 / 19 | 47 / 8 | 1.2 / 30 | 5 |
| Dec | 59 / 15 | 42 / 6 | 2.5 / 63 | 7 |
Extremes since 1945: highest 106°F / 41°C (June 14, 2000), lowest 0°F / -18°C (July 2, 1996).
Daylight lasts about 14.6 hours in June and 9.4 hours in December.
Data: Meteostat — Moffett Field, 1991–2020 averages.
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