Penngrove Weather Forecast

    • 51
    • 79

    Becoming Sunny

    • 54
    • 86

    Partly Sunny

    • 56
    • 84

    Partly Sunny

    • 50
    • 77

    Partly Sunny

    • 49
    • 77

    Partly Sunny

    • 50
    • 75

    Mostly Sunny

Today 22 Sep North Bay Interior Valleys

Mostly cloudy in the morning then becoming sunny. Areas of fog in the morning. Highs in the lower 70s to mid 80s. South Winds 5 to 10 Mph.

Tonight 22 Sep North Bay Interior Valleys

Clear in the evening then becoming partly cloudy. Areas of fog after midnight. Lows in the 40s to upper 50s. Southwest Winds 5 to 10 Mph. Becoming northwest after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Penngrove Temperature Statistics

September Temperature

Petaluma Municipal Airport (4.3 miles)

  • Lowest 7 September, 2026

    44.6 °F

  • Average September

    64.7 °F

  • Highest 9 September, 2026

    96.8 °F

Climate (2021–2026)

Petaluma Municipal Airport (4.3 miles)

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  • Average Low 2021–2026

    44.7 °F

  • Average 2021–2026

    55.2 °F

  • Average High 2021–2026

    68.5 °F
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