Clear Lake State Park Weather Forecast

    • 37
    • 56

    Mostly Sunny

    • 39
    • 58

    Mostly Sunny

    • 40
    • 59

    Mostly Sunny

    • 42
    • 58

    Chance Rain

    • 43
    • 54

    Rain Likely

    • 41
    • 54

    Chance Rain

Today 28 Dec Southern Lake County

Clear. Lows 33 to 43. Highs 50 to 64.

Tonight 28 Dec Southern Lake County

Clear. Lows 34 to 44. Highs 54 to 65.

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Clear Lake State Park Temperature Statistics

December Temperature

Ukiah Municipal Airport (21.7 miles)

  • Lowest 13 December, 2025

    30 °F

  • Average December

    49.8 °F

  • Highest 10 December, 2025

    72 °F

Climate (2020–Present)

Ukiah Municipal Airport (21.7 miles)

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  • Average Low 2020–2025

    47 °F

  • Average 2020–2025

    60.8 °F

  • Average High 2020–2025

    76 °F
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