Clearlake Weather Forecast

    • 41
    • 69

    Sunny

    • 45
    • 71

    Sunny

    • 43
    • 68

    Sunny

    • 44
    • 66

    Mostly Sunny

    • 44
    • 66

    Mostly Sunny

    • 43
    • 67

    Partly Sunny

Today 14 Jan Southern Lake County

Sunny. Highs 63 to 73.

Tonight 14 Jan Southern Lake County

Clear. Lows 42 to 52.

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Clearlake Temperature Statistics

January Temperature

Ukiah Municipal Airport (32.9 miles)

  • Lowest 9 January, 2026

    30 °F

  • Average January

    47.8 °F

  • Highest 11 January, 2026

    62.1 °F

Climate (2021–Present)

Ukiah Municipal Airport (32.9 miles)

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  • Average Low 2021–2026

    47.1 °F

  • Average 2021–2026

    60.8 °F

  • Average High 2021–2026

    76 °F
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