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St. Xavier, MT Weather Forecast
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St. Xavier Weather Forecast
| TODAY | TONIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT |
 |  |  |  |  |  |  | | |  | | |
| Thunderstorms | Chance of T-Storm | Rain Showers | Chance of Showers | Clouds | Mostly Clear | Sunny | Rain Showers | Mostly Sunny | Partly Cloudy | Sunny | Mostly Clear |
| Hi: 65°FHi: 18°C | Lo: 49°FLo: 9°C | Hi: 61°FHi: 16°C | Lo: 45°FLo: 7°C | Hi: 71°FHi: 22°C | Lo: 45°FLo: 7°C | Hi: 80°FHi: 27°C | Lo: 49°FLo: 9°C | Hi: 81°FHi: 27°C | Lo: 49°FLo: 9°C | Hi: 85°FHi: 29°C | Lo: 51°FLo: 11°C |
| POP: 90% | POP: 90% | POP: 90% | POP: 40% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 653 AM MDT Sat Sep 19 2026 
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Issued: 443 AM MDT Sat Sep 19 2026
Key Messages
- A few strong thunderstorms are possible over southeast Montana today.
- Flood Watch in effect through Sunday for much of the area. Widespread precipitation through the weekend, with potential for locally heavy rainfall through tonight.
- Widespread 50-95% chance of an inch of rainfall. 50-80% chance of two inches of rainfall for portions of south central Montana.
Discussion
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Next 7 Days...
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