Sonoma Mountain Weather Forecast

    • 41
    • 53

    Sunny

    • 44
    • 51

    Partly Sunny

    • 46
    • 49

    Rain Likely

    • 49
    • 51

    Rain Likely

    • 47
    • 51

    Rain Likely

    • 47
    • 49

    Rain Likely

Today 29 Dec North Bay Interior Valleys

Partly cloudy. Patchy dense fog and frost in the morning. Highs in the upper 40s to lower 60s. Northeast Winds 10 to 15 Mph.

Tonight 29 Dec North Bay Interior Valleys

Mostly cloudy. Lows in the upper 30s to mid 40s. Northeast Winds 5 to 10 Mph.

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Sonoma Mountain Temperature Statistics

December Temperature

Petaluma Municipal Airport (4.3 miles)

  • Lowest 4 December, 2025

    33.8 °F

  • Average December

    47 °F

  • Highest 3 December, 2025

    66.2 °F

Climate (2020–Present)

Petaluma Municipal Airport (4.3 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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