Penngrove Weather Forecast

    • 42
    • 60

    Mostly Cloudy

    • 43
    • 62

    Mostly Cloudy

    • 45
    • 65

    Partly Sunny

    • 44
    • 66

    Areas Fog

    • 43
    • 66

    Areas Fog

    • 44
    • 65

    Partly Sunny

Today 8 Dec North Bay Interior Valleys

Partly cloudy in the morning then becoming sunny. Widespread fog in the morning. Highs in the mid 40s to lower 60s. Northeast Winds up to 5 Mph. Becoming southwest in the afternoon.

Tonight 8 Dec North Bay Interior Valleys

Partly cloudy. Areas of fog in the Evening, then widespread fog after midnight. Lows in the 40s. North Winds up to 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Penngrove Temperature Statistics

December Temperature

Petaluma Municipal Airport (4.3 miles)

  • Lowest 4 December, 2025

    33.8 °F

  • Average December

    45.3 °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

    68.7 °F
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