Penngrove Weather Forecast

    • 55
    • 90

    Areas Freezing Fog

    • 57
    • 81

    Chance Rain Showers

    • 55
    • 78

    Slight Chance Rain Showers

    • 55
    • 80

    Areas Fog

    • 57
    • 84

    Mostly Sunny

    • 58
    • 85

    Chance Rain Showers

Today 17 Sep North Bay Interior Valleys

Sunny. Areas of dense fog in the morning. Highs in the lower 80s to mid 90s. Southwest Winds up to 5 Mph increasing to 10 to 15 Mph in the afternoon.

Tonight 17 Sep North Bay Interior Valleys

Partly cloudy. Lows in the 50s to mid 60s. Southwest Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Penngrove Temperature Statistics

September Temperature

Petaluma Municipal Airport (4.3 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 (4.3 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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