Guerneville Weather Forecast

    • 55
    • 87

    Increasing Clouds

    • 57
    • 86

    Mostly Sunny

    • 62
    • 90

    Mostly Cloudy

    • 61
    • 89

    Mostly Cloudy

    • 59
    • 85

    Mostly Sunny

    • 59
    • 88

    Mostly Sunny

Today 9 Jul North Bay Interior Valleys

Partly cloudy in the morning then becoming sunny. Patchy fog in the morning. Highs in the mid 70s to lower 90s. Southwest Winds 5 to 15 Mph.

Tonight 9 Jul North Bay Interior Valleys

Mostly clear in the evening then becoming partly cloudy. Lows in the 50s to lower 60s. Southwest Winds 5 to 15 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

    64 °F

  • Highest 3 July, 2026

    81.6 °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

    58.4 °F

  • Average High 2021–2026

    72.7 °F
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