Penngrove Weather Forecast

    • 40
    • 56

    Partly Sunny

    • 39
    • 58

    Partly Sunny

    • 43
    • 60

    Fog

    • 49
    • 63

    Chance Rain Showers

    • 49
    • 62

    Chance Rain Showers

    • 46
    • 59

    Slight Chance Rain Showers

Today 12 Dec North Bay Interior Valleys

Partly cloudy in the morning then becoming sunny. Patchy dense fog in the morning. Highs in the lower 50s to mid 60s. Southeast Winds 10 to 15 Mph.

Tonight 12 Dec North Bay Interior Valleys

Mostly clear. Lows in the upper 30s to lower 50s. Southeast Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

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Penngrove Temperature Statistics

December Temperature

Petaluma Municipal Airport (4.3 miles)

  • Lowest 4 December, 2025

    33.8 °F

  • Average December

    44 °F

  • Highest 3 December, 2025

    66.2 °F

Climate (2020–Present)

Petaluma Municipal Airport (4.3 miles)

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  • Average Low 2020–2025

    44.6 °F

  • Average 2020–2025

    55.1 °F

  • Average High 2020–2025

    68.6 °F
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