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St. Clair Weather Forecast
| REST OF TODAY | TONIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT |
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| Chance of Showers | Chance of Showers | Mostly Sunny | Mostly Clear | Sunny | Chance of Showers | Chance of Showers | Mostly Cloudy | Partly Sunny | Chance of Showers | Chance of Showers | Chance of Showers |
| Hi: 51°FHi: 11°C | Lo: 45°FLo: 7°C | Hi: 61°FHi: 16°C | Lo: 41°FLo: 5°C | Hi: 65°FHi: 18°C | Lo: 49°FLo: 9°C | Hi: 65°FHi: 18°C | Lo: 51°FLo: 11°C | Hi: 69°FHi: 21°C | Lo: 55°FLo: 13°C | Hi: 65°FHi: 18°C | Lo: 55°FLo: 13°C |
| POP: 70% | POP: 20% | POP: 40% | POP: 50% | POP: 30% | POP: 50% | POP: 40% |
POP = Probability of Precipitation.
Weather Outlook Updated: 859 AM CDT Mon Sep 21 2026 
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Issued: 552 AM CDT Mon Sep 21 2026
Key Messages
- Another mostly cloudy day is on tap to start the week with highs struggling to reach 60.
-Gradual warm up on the way with next chances for precip late Wednesday into Thursday.
Discussion
... Issued at 246 AM CDT Mon Sep 21 2026
Radar shows the rain ongoing across the southwestern corner of Minnesota is struggling to make it up to the Minnesota River Valley early this morning. This is likely due to low/mid level dry air as a high sits to the north of the Great Lakes continues to advect dr...