Guerneville Weather Forecast

    • 57
    • 88

    Sunny

    • 53
    • 89

    Sunny

    • 49
    • 86

    Sunny

    • 45
    • 75

    Mostly Sunny

    • 46
    • 66

    Partly Sunny

    • 48
    • 70

    Mostly Sunny

Today 15 Oct North Bay Interior Valleys

Sunny. Highs in the upper 70s to lower 90s. East Winds 5 to 10 Mph.

Tonight 15 Oct North Bay Interior Valleys

Clear. Lows in the lower 50s to mid 60s. North Winds 5 to 10 Mph.

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Guerneville Temperature Statistics

October Temperature

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

  • Lowest 12 October, 2026

    39 °F

  • Average October

    67.3 °F

  • Highest 3 October, 2026

    102.7 °F

Climate (2021–2026)

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

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  • Average Low 2021–2026

    45.9 °F

  • Average 2021–2026

    58.8 °F

  • Average High 2021–2026

    73 °F
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