Sonoma Weather Forecast

    • 53
    • 82

    Sunny

    • 55
    • 93

    Sunny

    • 54
    • 93

    Sunny

    • 54
    • 91

    Mostly Sunny

    • 56
    • 91

    Partly Sunny

    • 56
    • 92

    Mostly Sunny

    • 55
    • 91

    Mostly Sunny

Today 28 Sep North Bay Interior Valleys

Sunny. Highs in the lower 70s to mid 80s. Southwest Winds up to 5 Mph increasing to 10 to 20 Mph in the afternoon.

Tonight 28 Sep North Bay Interior Valleys

Mostly clear. Lows in the 50s to lower 60s. West Winds 10 to 15 Mph decreasing to up to 5 Mph after midnight.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Sonoma Temperature Statistics

September Temperature

Petaluma Municipal Airport (8.1 miles)

  • Lowest 7 September, 2026

    44.6 °F

  • Average September

    64 °F

  • Highest 9 September, 2026

    96.8 °F

Climate (2021–2026)

Petaluma Municipal Airport (8.1 miles)

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

  • Average Low 2021–2026

    44.7 °F

  • Average 2021–2026

    55.2 °F

  • Average High 2021–2026

    68.5 °F
Get WillyWeather+ to remove ads