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Jefferson School Weather Forecast
| TONIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY |
 |  | | |  |  |  |  | | |  | |
| Partly Cloudy | Mostly Sunny | Partly Cloudy | Mostly Sunny | Mostly Clear | Partly Cloudy | Chance of Rain | Mostly Cloudy | Partly Cloudy | Mostly Cloudy | Mostly Cloudy | Mostly Cloudy |
| Lo: 47°FLo: 8°C | Hi: 77°FHi: 25°C | Lo: 47°FLo: 8°C | Hi: 83°FHi: 28°C | Lo: 50°FLo: 10°C | Hi: 77°FHi: 25°C | Lo: 40°FLo: 4°C | Hi: 60°FHi: 16°C | Lo: 36°FLo: 2°C | Hi: 63°FHi: 17°C | Lo: 40°FLo: 4°C | Hi: 61°FHi: 16°C |
| POP: 40% |
POP = Probability of Precipitation.
Weather Outlook Updated: 1222 PM MDT Tue Sep 22 2026 
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Issued: 1240 PM MDT Tue Sep 22 2026
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KEY MESSAGES:- Unseasonable warmth through the rest of the week, with scattered afternoon thunderstorms in Southwest Montana and Lemhi County today.
- Cold front Friday brings widespread gusty winds, transitioning to a much cooler, breezy, and showery weekend.
Unseasonably warm and mostly dry conditions will persist across the Northern Rockies today, with valley temperatures running 10 to 15 degrees above seasonal averages. An upper-level shortwave lifting northeastward will interact wi...