Sonoma Weather Forecast

    • 40
    • 58

    Mostly Sunny

    • 35
    • 60

    Breezy

    • 37
    • 54

    Mostly Cloudy

    • 37
    • 58

    Fog

    • 40
    • 59

    Mostly Cloudy

    • 42
    • 57

    Fog

    • 40
    • 62

    Partly Sunny

Today 23 Jan North Bay Interior Valleys

Mostly cloudy late in the morning then becoming partly cloudy. Areas of fog late in the morning. Highs in the 50s to lower 60s. South Winds 5 to 10 Mph.

Tonight 23 Jan North Bay Interior Valleys

Mostly clear in the evening then becoming partly cloudy. Breezy. Lows in the 30s to upper 40s. West Winds 5 to 10 Mph increasing to northwest 20 to 30 Mph after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Sonoma Temperature Statistics

January Temperature

Petaluma Municipal Airport (8.1 miles)

  • Lowest 9 January, 2026

    30.2 °F

  • Average January

    50.6 °F

  • Highest 16 January, 2026

    64.4 °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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