Clearlake Weather Forecast

    • 43
    • 57

    Chance Rain Showers

    • 45
    • 57

    Rain

    • 43
    • 58

    Rain

    • 42
    • 56

    Rain

    • 38
    • 53

    Rain

    • 39
    • 52

    Rain

    • 39
    • 52

    Rain

Today 19 Dec Southern Lake County

Rain likely. Highs 52 to 62. At higher Elevation, southwest wind up to 25 Mph in the morning.

Tonight 19 Dec Southern Lake County

Cloudy. Patchy valley fog through the night. Chance of rain Showers in the evening. Slight chance of rain Showers overnight. Lows 40 to 50.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Clearlake Temperature Statistics

December Temperature

Ukiah Municipal Airport (32.9 miles)

  • Lowest 13 December, 2025

    30 °F

  • Average December

    47.9 °F

  • Highest 10 December, 2025

    72 °F

Climate (2020–Present)

Ukiah Municipal Airport (32.9 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2020–2025

    47 °F

  • Average 2020–2025

    60.7 °F

  • Average High 2020–2025

    76 °F
Get WillyWeather+ to remove ads