Thermalito, CA Weather Forecast
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Thermalito Weather Forecast
| TONIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | FRIDAY |
| Hazy | Sunny | Mostly Cloudy | Partly Cloudy | Partly Cloudy | Mostly Sunny | Mostly Clear | Clear | Clear | Mostly Clear | Mostly Clear | Mostly Clear |
| Lo: 60°FLo: 16°C | Hi: 92°FHi: 33°C | Lo: 62°FLo: 17°C | Hi: 88°FHi: 31°C | Lo: 62°FLo: 17°C | Hi: 90°FHi: 32°C | Lo: 62°FLo: 17°C | Hi: 91°FHi: 33°C Lo: 62°FLo: 17°C | Hi: 91°FHi: 33°C Lo: 62°FLo: 17°C | Hi: 93°FHi: 34°C Lo: 65°FLo: 18°C | Hi: 93°FHi: 34°C Lo: 65°FLo: 18°C | Hi: 93°FHi: 34°C Lo: 65°FLo: 18°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 202 PM PDT Fri Sep 18 2026 

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Issued: 1234 PM PDT Fri Sep 18 2026
Key Messages
- Seasonable temperatures and dry conditions persist over the weekend with generally offshore winds.
- Isolated mountain thunderstorm chances (up to 10%) along the Sierra from Highway 50 southward on Monday.
- Dry weather remainder of next week with gradual warming trend through the middle of the week.
Discussion
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Today-Weekend: Upper level troughing is beginning to eject eastward as of early this afternoon and is expected to exit the region by Saturday. In its wake, a brief period of weak...
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