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Riverton Weather Forecast
| TONIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY |
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| Mostly Cloudy | Sunny | Mostly Clear | Chance of T-Storm | Chance of Showers | Mostly Sunny | Mostly Clear | Mostly Cloudy | Chance of Showers | Partly Cloudy | Partly Cloudy | Chance of Showers |
| Lo: 45°FLo: 7°C | Hi: 61°FHi: 16°C | Lo: 41°FLo: 5°C | Hi: 61°FHi: 16°C | Lo: 49°FLo: 9°C | Hi: 65°FHi: 18°C | Lo: 45°FLo: 7°C | Hi: 65°FHi: 18°C | Lo: 49°FLo: 9°C | Hi: 69°FHi: 21°C Lo: 49°FLo: 9°C | Hi: 69°FHi: 21°C Lo: 49°FLo: 9°C | Hi: 69°FHi: 21°C Lo: 49°FLo: 9°C |
| POP: 100% | POP: 50% | POP: 20% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 611 PM CDT Sat Sep 12 2026 
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Issued: 647 PM CDT Sat Sep 12 2026
Key Messages
- Breezy west to northwest winds continue this afternoon with the potential for lake effect rain showers near the International Border tonight into early Tuesday morning.
- Patchy frost will be possible Sunday night into early Monday morning for portions of northwest WI and the MN Arrowhead.
- Widespread showers with embedded thunderstorms are expected on Monday into Monday night. Rainfall amounts of 1" or greater are likely (50-60% chance) for areas south of the Iron Range.
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