Clearlake Weather Forecast

    • 60
    • 97

    Hot

    • 61
    • 99

    Hot

    • 55
    • 92

    Sunny

    • 53
    • 81

    Mostly Sunny

    • 54
    • 83

    Sunny

    • 54
    • 85

    Mostly Sunny

Today 9 Sep Eastern Lake

Partly cloudy then becoming mostly cloudy late in the morning then becoming sunny. Highs 91 to 101. Northwest wind around 10 Mph.

Tonight 9 Sep Eastern Lake

Partly cloudy. Lows 63 to 73. West wind up to 10 Mph.

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Clearlake Temperature Statistics

September Temperature

Ukiah Municipal Airport (32.9 miles)

  • Lowest 6 September, 2026

    46 °F

  • Average September

    63.5 °F

  • Highest 5 September, 2026

    80.7 °F

Climate (2021–2026)

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

    76.1 °F
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