Clearlake Weather Forecast
Weather forecast for: Clearlake CA
Last Update: 2:10 am PDT Sep 15, 2026
Today: Sunny, with a high near 89. Calm wind becoming west around 5 mph in the afternoon.
Tonight: Clear, with a low around 52. West southwest wind 5 to 8 mph becoming calm in the evening.
Wednesday: Sunny, with a high near 82. Calm wind becoming south southeast around 6 mph in the afternoon.
Wednesday Night: Mostly clear, with a low around 51. South southwest wind around 6 mph becoming calm in the evening.
Thursday: Sunny, with a high near 82. Calm wind becoming east around 5 mph in the afternoon.
Thursday Night: Clear, with a low around 53. Calm wind.
Friday: Sunny, with a high near 91.
Friday Night: Clear, with a low around 55.
Saturday: Sunny, with a high near 92.
Saturday Night: Mostly clear, with a low around 55.
Sunday: Sunny, with a high near 89.
Sunday Night: Mostly clear, with a low around 54.
Monday: Sunny, with a high near 87.