Jack London State Historic Park Weather Forecast

    • 54
    • 82

    Increasing Clouds

    • 53
    • 81

    Mostly Sunny

    • 54
    • 83

    Mostly Sunny

    • 56
    • 85

    Sunny

    • 57
    • 90

    Sunny

    • 55
    • 88

    Mostly Sunny

Today 26 Aug North Bay Interior Valleys

Partly cloudy late in the morning then becoming sunny. A slight chance of Showers and isolated Thunderstorms. Highs in the upper 60s to mid 80s. Southwest Winds 5 to 15 Mph.

Tonight 26 Aug North Bay Interior Valleys

Partly cloudy in the evening then becoming mostly cloudy. Patchy fog after midnight. Lows in the 50s. Southwest Winds 5 to 15 Mph.

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Jack London State Historic Park Temperature Statistics

August Temperature

Petaluma Municipal Airport (6.8 miles)

  • Lowest 19 August, 2025

    44.6 °F

  • Average August

    62.6 °F

  • Highest 21 August, 2025

    91.4 °F

Climate (2020–Present)

Petaluma Municipal Airport (6.8 miles)

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  • Average Low 2020–2025

    44.5 °F

  • Average 2020–2025

    55.2 °F

  • Average High 2020–2025

    69.1 °F
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