Sonoma Weather Forecast

    • 32
    • 55

    Increasing Clouds

    • 36
    • 56

    Mostly Cloudy

    • 35
    • 57

    Partly Sunny

    • 38
    • 57

    Partly Sunny

    • 41
    • 60

    Partly Sunny

    • 43
    • 62

    Mostly Sunny

    • 43
    • 63

    Mostly Sunny

Today 9 Jan North Bay Interior Valleys

Sunny. Highs in the 50s. East Winds 5 to 10 Mph.

Tonight 9 Jan North Bay Interior Valleys

Mostly clear in the evening then becoming partly cloudy. Areas of frost after midnight. Lows in the mid 30s to lower 40s. East Winds 5 to 10 Mph.

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Sonoma Temperature Statistics

January Temperature

Petaluma Municipal Airport (8.1 miles)

  • Lowest 7 January, 2026

    42.8 °F

  • Average January

    51.2 °F

  • Highest 3 January, 2026

    60.8 °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

    68.6 °F
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