Sonoma Weather Forecast

    • 40
    • 64

    Areas Fog

    • 41
    • 63

    Mostly Cloudy

    • 40
    • 64

    Partly Sunny

    • 41
    • 65

    Patchy Fog

    • 41
    • 65

    Mostly Sunny

    • 42
    • 67

    Mostly Sunny

    • 43
    • 67

    Mostly Sunny

Today 30 Jan North Bay Interior Valleys

Partly cloudy. Highs in the 50s to upper 60s. East Winds 5 to 10 Mph.

Tonight 30 Jan North Bay Interior Valleys

Mostly cloudy. Patchy fog after midnight. Lows in the upper 30s to lower 50s. Northeast Winds 5 to 10 Mph.

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Sonoma Temperature Statistics

January Temperature

Petaluma Municipal Airport (8.1 miles)

  • Lowest 9 January, 2026

    30.2 °F

  • Average January

    50.2 °F

  • Highest 24 January, 2026

    69.8 °F

Climate (2021–Present)

Petaluma Municipal Airport (8.1 miles)

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  • Average Low 2021–2026

    44.6 °F

  • Average 2021–2026

    55.1 °F

  • Average High 2021–2026

    68.5 °F
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