Clearlake Weather Forecast

    • 49
    • 81

    Sunny

    • 51
    • 82

    Sunny

    • 52
    • 87

    Sunny

    • 49
    • 80

    Mostly Sunny

    • 49
    • 79

    Mostly Sunny

    • 52
    • 83

    Sunny

Today 19 May Southern Lake County

Sunny. Highs 72 to 86.

Tonight 19 May Southern Lake County

Mostly clear. Lows 45 to 55. Northwest wind around 20 Mph in the evening.

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Clearlake Temperature Statistics

May Temperature

Ukiah Municipal Airport (32.9 miles)

  • Lowest 5 May, 2025

    42.7 °F

  • Average May

    64.8 °F

  • Highest 9 May, 2025

    94.6 °F

Climate (2020–Present)

Ukiah Municipal Airport (32.9 miles)

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  • Average Low 2020–2025

    46.9 °F

  • Average 2020–2025

    60.7 °F

  • Average High 2020–2025

    76.3 °F
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