Guerneville Weather Forecast

    • 57
    • 86

    Becoming Sunny

    • 57
    • 84

    Mostly Sunny

    • 57
    • 83

    Mostly Sunny

    • 58
    • 86

    Mostly Sunny

    • 59
    • 86

    Mostly Sunny

    • 59
    • 86

    Mostly Sunny

Today 22 Aug North Bay Interior Valleys

Partly cloudy in the morning then becoming sunny. Highs in the upper 70s to lower 90s. West Winds 10 to 20 Mph.

Tonight 22 Aug North Bay Interior Valleys

Mostly clear. Lows in the 50s to lower 60s. Southwest Winds 10 to 20 Mph.

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Guerneville Temperature Statistics

August Temperature

Santa Rosa, Santa Rosa Sonoma County Airport (9.3 miles)

  • Lowest 7 August, 2019

    48.9 °F

  • Average August

    66.7 °F

  • Highest 15 August, 2019

    100 °F

Climate (2010–Present)

Santa Rosa, Santa Rosa Sonoma County Airport (9.3 miles)

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  • Average Low 2010–Present

    46 °F

  • Average 2010–Present

    56.4 °F

  • Average High 2010–Present

    71.5 °F
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