Clearlake Weather Forecast
- 30
- 51
Mostly Sunny
- 32
- 56
Mostly Sunny
- 37
- 57
Partly Sunny
- 38
- 62
Partly Sunny
- 43
- 65
Mostly Sunny
- 45
- 67
Mostly Sunny
Today 8 Jan Southern Lake County
Sunny. Highs 44 to 54.
Tonight 8 Jan Southern Lake County
Partly cloudy. Lows 29 to 39.
Clearlake Temperature Statistics
January Temperature
Ukiah Municipal Airport (32.9 miles)
Lowest 4 January, 2026
45 °FAverage January
51.4 °FHighest 6 January, 2026
57.9 °F
Climate (2021–Present)
Ukiah Municipal Airport (32.9 miles)
Average Low 2021–2026
47.1 °FAverage 2021–2026
60.8 °FAverage High 2021–2026
76 °F