Lake Sonoma Weather Forecast

    • 62
    • 89

    Sunny

    • 61
    • 90

    Sunny

    • 62
    • 91

    Mostly Sunny

    • 60
    • 83

    Chance Rain Showers

    • 58
    • 78

    Slight Chance Rain Showers

    • 58
    • 79

    Slight Chance Rain Showers

    • 58
    • 81

    Mostly Sunny

Today 15 Sep Sonoma Coastal Range

Sunny. Highs around 90. West Winds around 5 Mph.

Tonight 15 Sep Sonoma Coastal Range

Clear. Lows around 60. Light Winds.

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  • Temperature Real-Time

Lake Sonoma Temperature Statistics

September Temperature

Santa Rosa, Santa Rosa Sonoma County Airport (21.1 miles)

  • Lowest 7 September, 2025

    48.9 °F

  • Average September

    65.3 °F

  • Highest 1 September, 2025

    99 °F

Climate (2020–Present)

Santa Rosa, Santa Rosa Sonoma County Airport (21.1 miles)

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  • Average Low 2020–2025

    45.3 °F

  • Average 2020–2025

    57.9 °F

  • Average High 2020–2025

    72.8 °F
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