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Colusa County Fairgrounds Weather Forecast
| TONIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT |
 |  |  |  | | | | | | | | |
| Partly Cloudy | Mostly Sunny | Mostly Clear | Partly Cloudy | Mostly Clear | Mostly Sunny | Mostly Clear | Mostly Clear | Mostly Clear | Clear | Mostly Sunny | Clear |
| Lo: 63°FLo: 17°C | Hi: 94°FHi: 34°C | Lo: 61°FLo: 16°C | Hi: 93°FHi: 34°C | Lo: 62°FLo: 17°C | Hi: 94°FHi: 34°C | Lo: 61°FLo: 16°C | Hi: 93°FHi: 34°C Lo: 61°FLo: 16°C | Hi: 93°FHi: 34°C Lo: 61°FLo: 16°C | Lo: 58°FLo: 14°C | Hi: 90°FHi: 32°C | Hi: 90°FHi: 32°C Lo: 59°FLo: 15°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 800 PM PDT Sun Aug 23 2026 
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Colusa County Fairgrounds Forecast Discussion
Issued: 1133 AM PDT Sun Aug 23 2026
Key Messages
- Dry with seasonable high temperatures through the next week.
- Slight but uncertain chance for isolated thunderstorms on Monday.
Discussion
...
Some high clouds visible moving across interior NorCal today on GOES West Satellite imagery. Still, conditions remain dry with seasonable temperatures. Valley highs primarily in the 90s today, with 80s to 90s at higher elevations. Breezy onshore conditions, though less windy today than the last few days.
The remainder of the week, upper level low p...