Weather in Vallejo, California, United States
Historical monthly conditions · 2021–2025
Monthly averages
Average daily air-temperature lows/highs and peak wind gusts. Rain is the average monthly total.
| Month | Avg low | Avg high | Rain | Cloud cover | Avg peak gust |
|---|---|---|---|---|---|
| January | 6°C | 15°C | 95.3 mm | 59% | 30.8 km/h |
| February | 6°C | 17°C | 89.0 mm | 50% | 33.8 km/h |
| March | 7°C | 17°C | 93.1 mm | 52% | 39.0 km/h |
| April | 8°C | 21°C | 16.0 mm | 39% | 37.7 km/h |
| May | 11°C | 24°C | 10.4 mm | 28% | 42.0 km/h |
| June | 13°C | 26°C | 0.7 mm | 28% | 42.8 km/h |
| July | 13°C | 27°C | 0.3 mm | 29% | 40.4 km/h |
| August | 14°C | 28°C | 0.5 mm | 25% | 38.8 km/h |
| September | 14°C | 27°C | 7.8 mm | 31% | 35.0 km/h |
| October | 12°C | 24°C | 32.6 mm | 38% | 30.6 km/h |
| November | 8°C | 18°C | 61.0 mm | 52% | 28.3 km/h |
| December | 6°C | 14°C | 130.8 mm | 70% | 29.6 km/h |
Weather match by month
Feels like 15°C–30°C · cloud ≤60% · rain ≤0.1 mm/h · gust ≤50 km/h
Feels-like temperature accounts for humidity and wind in shade. Percentages cover 08:00–20:00 local solar time.
| Month | Match rate | |
|---|---|---|
| January | 5.1% | |
| February | 11.4% | |
| March | 13.2% | |
| April | 34.1% | |
| May | 59.1% | |
| June | 70.5% | |
| July | 78.7% | |
| August | 82.7% | |
| September | 69.3% | |
| October | 51.4% | |
| November | 17.0% | |
| December | 3.1% |
About this location and data
- Urban-centre population
- 149,117
- Elevation
- 101 m
- Coordinates
- 38.11°N, 122.23°W
- Urban area
- 76 km²
Weather averages use 2 ERA5 grid cells, weighted by the area of the urban centre in each cell.
2021-2025 recent-weather sample (not a 30-year normal).
How the weather scores are calculated