Sonoma Valley Regional Park Weather Forecast

    • 58
    • 95

    Increasing Clouds

    • 57
    • 86

    Chance Rain Showers

    • 56
    • 82

    Slight Chance Rain Showers

    • 57
    • 86

    Mostly Sunny

    • 59
    • 90

    Sunny

    • 59
    • 91

    Chance Rain Showers

Today 17 Sep North Bay Interior Valleys

Sunny. Highs in the lower 80s to mid 90s. Southwest Winds 5 to 15 Mph.

Tonight 17 Sep North Bay Interior Valleys

Partly cloudy. Lows in the 50s to mid 60s. West Winds 5 to 15 Mph.

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Sonoma Valley Regional Park Temperature Statistics

September Temperature

Petaluma Municipal Airport (8.1 miles)

  • Lowest 14 September, 2025

    48.2 °F

  • Average September

    62.9 °F

  • Highest 1 September, 2025

    93.2 °F

Climate (2020–Present)

Petaluma Municipal Airport (8.1 miles)

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  • Average Low 2020–2025

    44.4 °F

  • Average 2020–2025

    55.2 °F

  • Average High 2020–2025

    69.1 °F
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