Sonoma State Historic Park Weather Forecast

    • 43
    • 66

    Mostly Sunny

    • 42
    • 67

    Becoming Sunny

    • 42
    • 69

    Mostly Sunny

    • 42
    • 66

    Mostly Cloudy

    • 40
    • 63

    Partly Sunny

    • 40
    • 61

    Partly Sunny

    • 42
    • 64

    Mostly Sunny

Today 26 Oct North Bay Interior Valleys

Partly cloudy. Highs in the upper 50s to mid 60s.

Tonight 26 Oct North Bay Interior Valleys

Mostly clear. Lows in the upper 30s to lower 50s. West Winds 10 to 20 Mph.

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Sonoma State Historic Park Temperature Statistics

October Temperature

Petaluma Municipal Airport (8.1 miles)

  • Lowest 13 October, 2026

    39.2 °F

  • Average October

    63.4 °F

  • Highest 3 October, 2026

    98.6 °F

Climate (2021–2026)

Petaluma Municipal Airport (8.1 miles)

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  • Average Low 2021–2026

    44.7 °F

  • Average 2021–2026

    55.3 °F

  • Average High 2021–2026

    68.6 °F
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