Jack London State Historic Park Weather Forecast

    • 42
    • 59

    Increasing Clouds

    • 41
    • 60

    Partly Sunny

    • 43
    • 60

    Partly Sunny

    • 46
    • 62

    Partly Sunny

    • 45
    • 64

    Partly Sunny

    • 44
    • 65

    Mostly Sunny

Today 6 Dec North Bay Interior Valleys

Mostly cloudy in the morning then becoming sunny. Patchy fog in the morning. Highs in the lower 50s to mid 60s. South Winds 5 to 10 Mph. Becoming west 10 to 15 Mph in the afternoon.

Tonight 6 Dec North Bay Interior Valleys

Mostly clear in the evening then becoming mostly cloudy. Patchy dense fog after midnight. Lows in the 40s. Northwest Winds 10 to 15 Mph.

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Jack London State Historic Park Temperature Statistics

December Temperature

Petaluma Municipal Airport (6.8 miles)

  • Lowest 4 December, 2025

    33.8 °F

  • Average December

    46.5 °F

  • Highest 3 December, 2025

    66.2 °F

Climate (2020–Present)

Petaluma Municipal Airport (6.8 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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