Vallejo Weather Forecast
- 54
- 67
Mostly Sunny
- 56
- 65
Mostly Sunny
- 59
- 72
Mostly Sunny
- 58
- 76
Mostly Sunny
- 58
- 72
Mostly Sunny
- 57
- 67
Partly Sunny
Today 18 Aug Carquinez Strait and Delta
Sunny. Highs 79 to 85. West Winds 10 to 15 Mph with Gusts to around 25 Mph.
Tonight 18 Aug Carquinez Strait and Delta
Clear. Lows 53 to 59. Southwest Winds 10 to 15 Mph with Gusts to around 25 Mph.
Vallejo Temperature Statistics
August Temperature
Napa, Napa County Airport (6.8 miles)
Lowest 3 August, 2025
50.6 °FAverage August
67.2 °FHighest 6 August, 2025
88.6 °F
Climate (2020–Present)
Napa, Napa County Airport (6.8 miles)
Average Low 2020–2025
46.9 °FAverage 2020–2025
58.1 °FAverage High 2020–2025
70.5 °F