Sugarloaf Ridge State Park Weather Forecast

    • 56
    • 70

    Becoming Sunny

    • 56
    • 73

    Mostly Sunny

    • 58
    • 72

    Mostly Sunny

    • 57
    • 74

    Mostly Sunny

    • 54
    • 69

    Partly Sunny

    • 57
    • 64

    Mostly Cloudy

    • 55
    • 61

    Rain Likely

Today 30 Oct North Bay Interior Mountains

Partly cloudy. Highs in the lower 60s to mid 70s. Southwest Winds around 5 Mph.

Tonight 30 Oct North Bay Interior Mountains

Partly cloudy in the evening then becoming mostly clear. Lows in the mid 50s. Northwest Winds around 5 Mph becoming north after midnight.

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Sugarloaf Ridge State Park Temperature Statistics

October Temperature

Petaluma Municipal Airport (13.7 miles)

  • Lowest 17 October, 2025

    41 °F

  • Average October

    56.5 °F

  • Highest 7 October, 2025

    86 °F

Climate (2020–Present)

Petaluma Municipal Airport (13.7 miles)

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  • Average Low 2020–2025

    44.4 °F

  • Average 2020–2025

    55.1 °F

  • Average High 2020–2025

    68.8 °F
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