Weather forecast for: Clearlake CA
Last Update: 2:10 pm PDT Sep 16, 2026
Tonight: Patchy fog after 2am. Otherwise, mostly clear, with a low around 49. Calm wind.
Thursday: Patchy fog before 8am. Otherwise, mostly sunny, with a high near 77. Calm wind becoming east around 5 mph in the afternoon.
Thursday Night: Mostly clear, with a low around 52. Calm wind.
Friday: Sunny, with a high near 87. Light and variable wind.
Friday Night: Clear, with a low around 56. West wind around 5 mph becoming calm in the evening.
Saturday: Sunny, with a high near 91. Light and variable wind.
Saturday Night: Mostly clear, with a low around 57.
Sunday: Mostly sunny, with a high near 89.
Sunday Night: Mostly clear, with a low around 58.
Monday: Sunny, with a high near 94.
Monday Night: Clear, with a low around 59.
Tuesday: Sunny, with a high near 95.
Tuesday Night: Mostly clear, with a low around 59.
Wednesday: Sunny, with a high near 93.