Clearlake Weather Forecast

    • 41
    • 62

    Cloudy

    • 40
    • 65

    Partly Sunny

    • 38
    • 63

    Mostly Sunny

    • 37
    • 61

    Partly Sunny

    • 36
    • 58

    Mostly Cloudy

    • 37
    • 59

    Partly Sunny

Today 21 Jan Southern Lake County

Cloudy. Highs 56 to 66.

Tonight 21 Jan Southern Lake County

Cloudy. Lows 41 to 51.

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Clearlake Temperature Statistics

January Temperature

Ukiah Municipal Airport (32.9 miles)

  • Lowest 9 January, 2026

    30 °F

  • Average January

    47.3 °F

  • Highest 15 January, 2026

    70 °F

Climate (2021–Present)

Ukiah Municipal Airport (32.9 miles)

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  • Average Low 2021–2026

    47 °F

  • Average 2021–2026

    60.7 °F

  • Average High 2021–2026

    76 °F
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