Clearlake Weather Forecast

    • 44
    • 66

    Mostly Cloudy

    • 40
    • 55

    Rain

    • 31
    • 53

    Rain Likely

    • 34
    • 54

    Partly Sunny

    • 39
    • 56

    Slight Chance Rain

    • 39
    • 61

    Mostly Cloudy

Today 5 Dec Southern Lake County

Mostly cloudy. Patchy valley fog in the morning. Highs 60 to 70.

Tonight 5 Dec Southern Lake County

Mostly cloudy. Patchy valley fog overnight. Chance of rain overnight. Lows 39 to 49.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Clearlake Temperature Statistics

December Temperature

Ukiah Municipal Airport (32.9 miles)

  • Lowest 1 December, 2023

    36 °F

  • Average December

    50.5 °F

  • Highest 3 December, 2023

    60.1 °F

Climate (2018–Present)

Ukiah Municipal Airport (32.9 miles)

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  • Average Low 2018–2023

    46.7 °F

  • Average 2018–2023

    59.9 °F

  • Average High 2018–2023

    75.5 °F
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