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Clear Lake, CA Weather Forecast
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Clear Lake Weather Forecast
| TODAY | TONIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | WEDNESDAY | THURSDAY | THURSDAY NIGHT | FRIDAY |
 |  |  |  | | | | | | | |
| Sunny | Partly Cloudy | Mostly Cloudy | Mostly Clear | Sunny | Clear | Clear | Clear | Mostly Clear | Mostly Clear | Sunny |
| Hi: 95°FHi: 35°C | Lo: 68°FLo: 20°C | Hi: 95°FHi: 35°C | Lo: 68°FLo: 20°C | Hi: 95°FHi: 35°C | Hi: 95°FHi: 35°C Lo: 68°FLo: 20°C | Hi: 95°FHi: 35°C Lo: 68°FLo: 20°C | Hi: 95°FHi: 35°C Lo: 68°FLo: 20°C | Hi: 93°FHi: 34°C Lo: 66°FLo: 19°C | Hi: 93°FHi: 34°C Lo: 66°FLo: 19°C | Hi: 86°FHi: 30°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 136 AM PDT Sat Oct 03 2026 
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Issued: 1200 AM PDT Sat Oct 3 2026
Key Messages
- Unseasonably hot temperatures will peak Saturday with close to record breaking daytime highs. Such temperatures will generate Moderate HeatRisk across the interior through mid next week.
- Shallow, diurnal marine layer persisting along the coast through the weekend.
- Nearly 0% chance of wetting rain for the next 10 days.
Discussion
...An unseasonably high upper level ridge continues to build over NW California. This upper level ridge will force a very stable atmosphere with afternoon comp...