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.
Clearlake Temperature Statistics
May Temperature
Ukiah Municipal Airport (32.9 miles)
Lowest 5 May, 2025
42.7 °FAverage May
64.8 °FHighest 9 May, 2025
94.6 °F
Climate (2020–Present)
Ukiah Municipal Airport (32.9 miles)
Average Low 2020–2025
46.9 °FAverage 2020–2025
60.7 °FAverage High 2020–2025
76.3 °F