Clearlake Weather Forecast

    • 49
    • 79

    Partly Sunny

    • 45
    • 78

    Becoming Sunny

    • 48
    • 78

    Partly Sunny

    • 48
    • 75

    Slight Chance Rain

    • 46
    • 69

    Chance Rain

    • 46
    • 69

    Chance Rain

    • 44
    • 70

    Partly Sunny

Today 5 Apr Southern Lake County

Mostly cloudy in the morning then becoming partly cloudy. Highs 73 to 83.

Tonight 5 Apr Southern Lake County

Partly cloudy then becoming mostly cloudy late in the evening then becoming partly cloudy. Lows 46 to 56.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Clearlake Temperature Statistics

April Temperature

Ukiah Municipal Airport (32.9 miles)

  • Lowest 3 April, 2026

    36 °F

  • Average April

    53.7 °F

  • Highest 3 April, 2026

    79 °F

Climate (2021–Present)

Ukiah Municipal Airport (32.9 miles)

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  • Average Low 2021–2026

    47.1 °F

  • Average 2021–2026

    61 °F

  • Average High 2021–2026

    76.3 °F
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