Petaluma Weather Forecast

    • 48
    • 71

    Decreasing Clouds

    • 48
    • 76

    Mostly Sunny

    • 51
    • 76

    Mostly Sunny

    • 51
    • 79

    Mostly Sunny

    • 51
    • 73

    Mostly Cloudy

    • 54
    • 71

    Chance Rain

    • 53
    • 67

    Rain Likely

Today 30 Oct North Bay Interior Valleys

Partly cloudy. Highs in the mid 60s to upper 70s. Southwest Winds 5 to 15 Mph.

Tonight 30 Oct North Bay Interior Valleys

Partly cloudy in the evening then becoming mostly clear. Patchy fog after midnight. Lows in the 40s to mid 50s. West Winds 5 to 10 Mph.

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Petaluma Temperature Statistics

October Temperature

Petaluma Municipal Airport (2.5 miles)

  • Lowest 17 October, 2025

    41 °F

  • Average October

    56.5 °F

  • Highest 7 October, 2025

    86 °F

Climate (2020–Present)

Petaluma Municipal Airport (2.5 miles)

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  • Average Low 2020–2025

    44.4 °F

  • Average 2020–2025

    55.1 °F

  • Average High 2020–2025

    68.8 °F
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