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Grant County Weather Forecast
| REST OF TONIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SUNDAY | MONDAY | TUESDAY | WEDNESDAY |
 |  |  |  |  | | | | | |
| Partly Cloudy | Partly Sunny | Mostly Cloudy | Sunny | Mostly Clear | Mostly Clear | Mostly Clear | Mostly Clear | Mostly Clear | Mostly Clear |
| Lo: 45°FLo: 7°C | Hi: 70°FHi: 21°C | Lo: 47°FLo: 8°C | Hi: 77°FHi: 25°C | Lo: 46°FLo: 8°C | Hi: 76°FHi: 24°C Lo: 46°FLo: 8°C | Hi: 76°FHi: 24°C Lo: 46°FLo: 8°C | Hi: 76°FHi: 24°C Lo: 46°FLo: 8°C | Hi: 76°FHi: 24°C Lo: 46°FLo: 8°C | Hi: 76°FHi: 24°C Lo: 46°FLo: 8°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 1036 PM PDT Wed Sep 30 2026 
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Issued: 1100 PM PDT Wed Sep 30 2026
Key Messages
- Sheltered northern valleys will see low temperatures in the mid 30s each morning through Friday, leading to isolated areas of frost development.
- Temperatures gradually trend warmer through the rest of the week and into the weekend. Afternoon highs peak in the 70s and low 80s Saturday through Monday.
- Mainly dry conditions are forecast with the exception of shower chances for the North Cascades Thursday and Friday.
Discussion
... Thursday through Friday: The region is under a zonal flow ...