Vallejo Weather Forecast

    • 59
    • 66

    Mostly Sunny

    • 59
    • 65

    Mostly Sunny

    • 59
    • 69

    Mostly Sunny

    • 60
    • 75

    Mostly Sunny

    • 59
    • 75

    Mostly Sunny

    • 59
    • 73

    Mostly Sunny

    • 57
    • 68

    Mostly Sunny

Today 12 Sep Carquinez Strait and Delta

Sunny. Highs 80 to 86. West Winds around 10 Mph with Gusts to around 20 Mph.

Tonight 12 Sep Carquinez Strait and Delta

Clear. Lows around 60. Southwest Winds 10 to 15 Mph with Gusts to around 25 Mph.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Vallejo Temperature Statistics

September Temperature

Napa, Napa County Airport (6.8 miles)

  • Lowest 3 September, 2025

    52 °F

  • Average September

    66 °F

  • Highest 1 September, 2025

    89.1 °F

Climate (2020–Present)

Napa, Napa County Airport (6.8 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2020–2025

    46.9 °F

  • Average 2020–2025

    58.1 °F

  • Average High 2020–2025

    70.5 °F
Get WillyWeather+ to remove ads