Clearlake Weather Forecast

    • 46
    • 57

    Rain

    • 44
    • 55

    Rain

    • 41
    • 53

    Rain

    • 37
    • 49

    Rain

    • 33
    • 51

    Rain Likely

    • 33
    • 54

    Mostly Sunny

Today 22 Dec Southern Lake County

Cloudy. Chance of rain Showers. Highs 50 to 60.

Tonight 22 Dec Southern Lake County

Rain. Lows 40 to 50.

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Clearlake Temperature Statistics

December Temperature

Ukiah Municipal Airport (32.9 miles)

  • Lowest 13 December, 2025

    30 °F

  • Average December

    48.5 °F

  • Highest 10 December, 2025

    72 °F

Climate (2020–Present)

Ukiah Municipal Airport (32.9 miles)

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  • Average Low 2020–2025

    47 °F

  • Average 2020–2025

    60.7 °F

  • Average High 2020–2025

    76 °F
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