Sonoma Mountain Weather Forecast

    • 46
    • 52

    Partly Sunny

    • 53
    • 57

    Partly Sunny

    • 54
    • 59

    Rain Likely

    • 47
    • 55

    Chance Rain

    • 52
    • 54

    Rain Likely

    • 47
    • 53

    Rain

Today 14 Dec North Bay Interior Valleys

Partly cloudy. Areas of fog in the Morning, then patchy fog in the afternoon. Highs in the 50s to lower 60s. East Winds 5 to 10 Mph. Becoming south in the afternoon.

Tonight 14 Dec North Bay Interior Valleys

Partly cloudy in the evening then becoming mostly cloudy. Areas of fog. Lows in the upper 30s to lower 50s. Northwest Winds up to 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Sonoma Mountain Temperature Statistics

December Temperature

Petaluma Municipal Airport (4.3 miles)

  • Lowest 4 December, 2025

    33.8 °F

  • Average December

    43.8 °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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