Vallejo, CA
Climate overview — based on NOAA 1991-2020 normals from VALLEJO, CA US.
Year-round temperatures (°F)
Climate summary
Vallejo has an annual average temperature of 61.6°F with about 21.5 inches of precipitation per year. The warmest month is September (average high 86.1°F), and the coldest is January (average low 42.0°F). December is typically the wettest month (4.49 in) and July the driest (0.00 in).
Best time to visit Vallejo
Full guide →Climate change signal
All-time records →269 of 366 (73.5%) of Vallejo's all-time daily heat records have been set since 2015. If records were spread evenly across the station's history, only about 5% would fall in any given decade.
| 1990s | 28 | |
| 2000s | 69 | |
| 2010s | 130 | |
| 2020s | 139 |
Bars: number of all-time daily heat records still standing that were set in each decade.
Monthly averages
| Month | Avg High | Avg Low | Avg Temp | Precipitation | Snow | Rainy days |
|---|---|---|---|---|---|---|
| January | 57.3°F | 42.0°F | 49.7°F | 4.46 in | — | — |
| February | 63.1°F | 45.0°F | 54.1°F | 3.58 in | — | — |
| March | 68.4°F | 45.9°F | 57.2°F | 3.18 in | — | — |
| April | 72.7°F | 47.2°F | 60.0°F | 1.45 in | — | — |
| May | 78.4°F | 50.9°F | 64.7°F | 0.80 in | — | — |
| June | 83.1°F | 54.1°F | 68.6°F | 0.22 in | — | — |
| July | 85.4°F | 55.7°F | 70.6°F | 0.00 in | — | — |
| August | 86.0°F | 56.1°F | 71.1°F | 0.04 in | — | — |
| September | 86.1°F | 56.5°F | 71.3°F | 0.08 in | — | — |
| October | 79.0°F | 53.6°F | 66.3°F | 1.02 in | — | — |
| November | 65.5°F | 47.0°F | 56.3°F | 2.17 in | — | — |
| December | 57.6°F | 42.0°F | 49.8°F | 4.49 in | — | — |
Climate twins of Vallejo
Why these? →The most climatically similar US cities at least 140 miles away (by monthly temperature + precipitation pattern).