Penngrove Weather Forecast

    • 34
    • 57

    Mostly Cloudy

    • 36
    • 58

    Partly Sunny

    • 38
    • 58

    Mostly Sunny

    • 40
    • 61

    Patchy Fog

    • 43
    • 62

    Mostly Sunny

    • 43
    • 64

    Mostly Sunny

    • 43
    • 64

    Mostly Sunny

Today 10 Jan North Bay Interior Valleys

Partly cloudy late in the morning then becoming mostly cloudy. Highs in the 50s. East Winds 5 to 10 Mph.

Tonight 10 Jan North Bay Interior Valleys

Mostly cloudy in the evening then becoming partly cloudy. Lows in the 30s to mid 40s. Northeast Winds 5 to 10 Mph.

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Penngrove Temperature Statistics

January Temperature

Petaluma Municipal Airport (4.3 miles)

  • Lowest 8 January, 2026

    37.4 °F

  • Average January

    50.6 °F

  • Highest 3 January, 2026

    60.8 °F

Climate (2021–Present)

Petaluma Municipal Airport (4.3 miles)

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  • Average Low 2021–2026

    44.6 °F

  • Average 2021–2026

    55.1 °F

  • Average High 2021–2026

    68.6 °F
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