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St. Thomas Weather Forecast
| THIS AFTERNOON | TONIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT |
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| Windy | Chance of Showers | Sunny | Mostly Clear | Sunny | Partly Cloudy | Partly Cloudy | Chance of T-Storm | Mostly Sunny | Mostly Cloudy | Mostly Cloudy | Chance of Showers |
| Hi: 75°FHi: 24°C | Lo: 53°FLo: 12°C | Hi: 73°FHi: 23°C | Lo: 48°FLo: 9°C | Hi: 78°FHi: 26°C | Hi: 75°FHi: 24°C Lo: 55°FLo: 13°C | Hi: 75°FHi: 24°C Lo: 55°FLo: 13°C | Lo: 48°FLo: 9°C | Hi: 63°FHi: 17°C | Hi: 63°FHi: 17°C Lo: 43°FLo: 6°C | Hi: 63°FHi: 17°C Lo: 43°FLo: 6°C | Lo: 43°FLo: 6°C |
| POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 338 PM CDT Tue Sep 08 2026 
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Issued: 239 PM CDT Tue Sep 8 2026
Key Messages
- Windy conditions develop today with wind gusts to 50 mph across parts of northeast North Dakota and the northern Red River Valley in Minnesota.
- There is a medium chance for severe thunderstorms Friday afternoon and evening across parts of eastern North Dakota, and northwest and west central Minnesota.
Discussion
... Issued at 239 PM CDT Tue Sep 8 2026
...Synopsis...
A robust mid/upper low is centered over Manitoba, with dry/subsident air centered over our CWA on WV imagery and 925 MB CAA...