Sugarloaf Ridge State Park Weather Forecast

    • 53
    • 58

    Increasing Clouds

    • 57
    • 60

    Rain

    • 50
    • 59

    Chance Rain

    • 53
    • 57

    Rain Likely

    • 52
    • 58

    Rain

    • 50
    • 54

    Rain Likely

    • 51
    • 55

    Rain Likely

Today 15 Dec North Bay Interior Mountains

Partly cloudy late in the morning then becoming mostly cloudy. Highs near 60. Light Winds. Becoming west around 5 Mph in the afternoon.

Tonight 15 Dec North Bay Interior Mountains

Partly cloudy. Patchy dense fog after midnight. A chance of rain after midnight. Lows in the lower to mid 50s. Northwest Winds 5 to 10 Mph.

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  • Temperature Real-Time

Sugarloaf Ridge State Park Temperature Statistics

December Temperature

Petaluma Municipal Airport (13.7 miles)

  • Lowest 4 December, 2025

    33.8 °F

  • Average December

    43.3 °F

  • Highest 3 December, 2025

    66.2 °F

Climate (2020–Present)

Petaluma Municipal Airport (13.7 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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