Guerneville Weather Forecast

    • 48
    • 78

    Areas Fog

    • 50
    • 71

    Partly Sunny

    • 50
    • 73

    Areas Fog

    • 56
    • 82

    Mostly Sunny

    • 54
    • 87

    Sunny

    • 53
    • 84

    Mostly Sunny

    • 52
    • 79

    Mostly Sunny

Today 6 Jul North Bay Interior Valleys

Sunny. Highs in the upper 60s to mid 80s. Southwest Winds 5 to 15 Mph.

Tonight 6 Jul North Bay Interior Valleys

Mostly clear in the evening then becoming mostly cloudy. Areas of fog after midnight. Lows in the 40s to mid 50s. 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 4 July, 2025

    46.9 °F

  • Average July

    64.1 °F

  • Highest 2 July, 2025

    82.9 °F

Climate (2020–Present)

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

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  • Average Low 2020–2025

    45.3 °F

  • Average 2020–2025

    57.8 °F

  • Average High 2020–2025

    72.8 °F
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