Weather WorldJeff Lake, MT Weather Forecast
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Jeff Lake Weather Forecast
| TODAY | TONIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT |
 |  |  |  | | |  |  | | | | |
| Partly Sunny | Mostly Clear | Sunny | Partly Cloudy | Sunny | Partly Cloudy | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm |
| Hi: 55°FHi: 13°C | Lo: 25°FLo: -4°C | Hi: 65°FHi: 18°C | Lo: 30°FLo: -1°C | Hi: 69°FHi: 21°C | Lo: 31°FLo: -1°C | Hi: 71°FHi: 22°C | Lo: 35°FLo: 2°C | Hi: 65°FHi: 18°C | Lo: 31°FLo: -1°C | Hi: 61°FHi: 16°C | Lo: 29°FLo: -2°C |
| POP: 60% | POP: 60% | POP: 60% | POP: 40% | POP: 50% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 1235 AM MDT Mon Sep 14 2026 
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Issued: 134 AM MDT Mon Sep 14 2026
Key Messages
- Below average temperatures through the middle of the week.
- Chance of showers (mainly light) through today. Isolated thunderstorms possible in southeast Montana overnight, a few possibly strong.
- Frontal passage brings brisk northwest winds overnight. Brisk west winds across the area Monday; widespread gusts of 30 to 50 mph, strongest from Big Timber to Harlowton and near the Dakotas border.
Discussion
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Next 7 days (Through Sunday)...
Vigorous upper trough will be tracking into and acro...