Sonoma State Historic Park Weather Forecast

    • 39
    • 50

    Rain Showers

    • 34
    • 50

    Partly Sunny

    • 34
    • 51

    Partly Sunny

    • 34
    • 53

    Mostly Sunny

    • 35
    • 54

    Mostly Sunny

    • 39
    • 52

    Partly Sunny

Today 26 Dec North Bay Interior Valleys

Showers. A slight chance of Thunderstorms in the afternoon. Some Thunderstorms may produce heavy rainfall in the afternoon. Highs in the 40s to upper 50s. South Winds 10 to 20 Mph.

Tonight 26 Dec North Bay Interior Valleys

Mostly cloudy. A chance of Showers. Lows in the 40s to lower 50s. South Winds 10 to 20 Mph with Gusts to around 35 Mph.

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Sonoma State Historic Park Temperature Statistics

December Temperature

Petaluma Municipal Airport (8.1 miles)

  • Lowest 4 December, 2025

    33.8 °F

  • Average December

    46.4 °F

  • Highest 3 December, 2025

    66.2 °F

Climate (2020–Present)

Petaluma Municipal Airport (8.1 miles)

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  • Average Low 2020–2025

    44.6 °F

  • Average 2020–2025

    55.1 °F

  • Average High 2020–2025

    68.6 °F
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