Guerneville Weather Forecast

    • 45
    • 67

    Gradual Clearing

    • 45
    • 66

    Partly Sunny

    • 42
    • 63

    Partly Sunny

    • 44
    • 66

    Mostly Sunny

    • 48
    • 66

    Mostly Cloudy

    • 48
    • 68

    Chance Rain

Today 29 Oct North Bay Interior Valleys

Mostly cloudy. Highs in the 60s to lower 70s. Northeast Winds up to 5 Mph. Becoming south in the afternoon.

Tonight 29 Oct North Bay Interior Valleys

Mostly cloudy in the evening then becoming partly cloudy. Areas of fog after midnight. Lows in the upper 30s to mid 50s. West Winds up to 5 Mph.

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Guerneville Temperature Statistics

October Temperature

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

  • Lowest 27 October, 2026

    37 °F

  • Average October

    63.9 °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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