Petaluma Municipal Airport Weather Forecast

    • 46
    • 71

    Chance Rain Showers

    • 42
    • 67

    Chance Rain Showers

    • 42
    • 73

    Mostly Sunny

    • 41
    • 76

    Mostly Sunny

    • 43
    • 75

    Partly Sunny

    • 42
    • 74

    Partly Sunny

Today 21 Oct North Bay Interior Valleys

Mostly cloudy. Patchy fog in the morning. A slight chance of Showers. Highs in the lower 60s to mid 70s. Northwest Winds up to 5 Mph. Becoming south in the afternoon.

Tonight 21 Oct North Bay Interior Valleys

Mostly cloudy. A chance of Showers. Areas of fog after midnight. Lows in the 40s to mid 50s. Southwest Winds up to 5 Mph. Becoming northwest after midnight.

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Petaluma Municipal Airport Temperature Statistics

October Temperature

Petaluma Municipal Airport (0 miles)

  • Lowest 13 October, 2026

    39.2 °F

  • Average October

    65.9 °F

  • Highest 3 October, 2026

    98.6 °F

Climate (2021–2026)

Petaluma Municipal Airport (0 miles)

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  • Average Low 2021–2026

    44.7 °F

  • Average 2021–2026

    55.3 °F

  • Average High 2021–2026

    68.6 °F
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