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| REST OF TODAY | TONIGHT | LABOR DAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT |
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| Mostly Cloudy | Chance of T-Storm | Chance of T-Storm | Chance of Showers | Chance of Showers | Partly Cloudy | Sunny | Windy | Windy | Chance of Showers | Chance of T-Storm | Chance of T-Storm |
| Hi: 70°FHi: 21°C | Lo: 51°FLo: 11°C | Hi: 61°FHi: 16°C | Lo: 49°FLo: 9°C | Hi: 65°FHi: 18°C | Lo: 45°FLo: 7°C | Hi: 75°FHi: 24°C | Hi: 79°FHi: 26°C Lo: 51°FLo: 11°C | Hi: 79°FHi: 26°C Lo: 51°FLo: 11°C | Lo: 49°FLo: 9°C | Hi: 65°FHi: 18°C | Lo: 41°FLo: 5°C |
| POP: 50% | POP: 100% | POP: 50% | POP: 50% | POP: 20% | POP: 20% | POP: 50% |
POP = Probability of Precipitation.
Weather Outlook Updated: 1232 PM MDT Sun Sep 06 2026 
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Issued: 1149 AM MDT Sun Sep 6 2026
Key Messages
- Thunderstorms, some strong to severe, are expected to move through Montana this evening, particularly north of a Helena to Lewistown line.
- Widespread soaking rainfall expected tonight through Tuesday morning, with widespread rainfall amounts over an inch across the plains, with lighter amounts across Southwestern Montana.
- Drier conditions return Wednesday, but precipitation returns Thursday night into Friday.
Discussion
... /Issued 300 AM MDT Sun Sep 6 2026/
Deep upper level troughing l...