Guerneville Weather Forecast

    • 54
    • 81

    Becoming Sunny

    • 56
    • 84

    Mostly Sunny

    • 57
    • 84

    Mostly Sunny

    • 57
    • 87

    Mostly Sunny

    • 58
    • 83

    Mostly Sunny

    • 58
    • 84

    Mostly Sunny

Today 23 Jul North Bay Interior Valleys

Partly cloudy in the morning then becoming sunny. Highs in the 70s to 80s. West Winds 5 to 10 Mph increasing to 10 to 20 Mph in the afternoon.

Tonight 23 Jul North Bay Interior Valleys

Partly cloudy. Patchy fog. Lows in the 50s. West Winds 5 to 10 Mph.

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Guerneville Temperature Statistics

July Temperature

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

  • Lowest 1 July, 2026

    46.4 °F

  • Average July

    67.7 °F

  • Highest 14 July, 2026

    97.6 °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

    58.5 °F

  • Average High 2021–2026

    72.8 °F
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