Clearlake Weather Forecast

    • 53
    • 85

    Sunny

    • 57
    • 92

    Sunny

    • 62
    • 96

    Sunny

    • 65
    • 103

    Hot

    • 65
    • 104

    Hot

    • 63
    • 99

    Hot

Today 18 Aug Southern Lake County

Sunny. Highs 75 to 88.

Tonight 18 Aug Southern Lake County

Clear. Lows 51 to 61.

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Clearlake Temperature Statistics

August Temperature

Ukiah Municipal Airport (32.9 miles)

  • Lowest 5 August, 2025

    51.7 °F

  • Average August

    77.1 °F

  • Highest 9 August, 2025

    104.6 °F

Climate (2020–Present)

Ukiah Municipal Airport (32.9 miles)

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  • Average Low 2020–2025

    46.8 °F

  • Average 2020–2025

    60.7 °F

  • Average High 2020–2025

    76.3 °F
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