Weather WorldJefferson County, ID Weather Forecast
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Jefferson County Weather Forecast
| TODAY | TONIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT |
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| Mostly Sunny | Mostly Clear | Sunny | Partly Cloudy | Sunny | Partly Cloudy | Partly Cloudy | Mostly Cloudy | Mostly Sunny | Chance of Rain | Partly Cloudy | Partly Cloudy |
| Hi: 69°FHi: 21°C | Lo: 44°FLo: 7°C | Hi: 74°FHi: 23°C | Lo: 47°FLo: 8°C | Hi: 76°FHi: 24°C | Hi: 66°FHi: 19°C Lo: 48°FLo: 9°C | Hi: 66°FHi: 19°C Lo: 48°FLo: 9°C | Lo: 45°FLo: 7°C | Hi: 68°FHi: 20°C | Lo: 45°FLo: 7°C | Hi: 63°FHi: 17°C Lo: 40°FLo: 4°C | Hi: 63°FHi: 17°C Lo: 40°FLo: 4°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 1231 AM MDT Wed Sep 23 2026 
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Issued: 518 AM MDT Wed Sep 23 2026
Key Messages
- Warmer temperatures through Friday with well above normal conditions Thursday and Friday.
- Breezy to windy Friday afternoon followed by cooler weather this weekend with some potential for showers and storms Sunday and Monday.
Discussion
... Issued at 239 AM MDT Wed Sep 23 2026
Upper level trof which brought the showers and isolated thunderstorms yesterday continues to push rapidly east. Will have much drier and warmer conditions today with skies becoming sunny after some patchy fog this ...