Erwin, SD Weather Forecast
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Erwin Weather Forecast
| THIS AFTERNOON | TONIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT |
| Chance of Showers | Mostly Cloudy | Showers | Showers | Rain Showers | Chance of T-Storm | Mostly Cloudy | Mostly Cloudy | Mostly Sunny | Partly Cloudy | Mostly Sunny | Partly Cloudy |
| Hi: 55°FHi: 13°C | Lo: 40°FLo: 4°C | Hi: 49°FHi: 9°C | Lo: 35°FLo: 2°C | Hi: 45°FHi: 7°C | Lo: 35°FLo: 2°C | Hi: 55°FHi: 13°C | Lo: 41°FLo: 5°C | Hi: 61°FHi: 16°C | Lo: 40°FLo: 4°C | Hi: 61°FHi: 16°C | Lo: 49°FLo: 9°C |
| POP: 20% | POP: 90% | POP: 100% | POP: 100% | POP: 100% |
POP = Probability of Precipitation.
Weather Outlook Updated: 134 PM CDT Sat Oct 24 2026 

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Issued: 206 PM CDT Sat Oct 24 2026
Key Messages
- Intermittent showers will continue into tonight mainly west of I-29 with light accumulations expected.
- Breezy northwesterly winds will continue through the early evening with gusts between 25-35 mph expected.
- Widespread rain chances (60%-90%) are expected from Sunday into Monday. Confidence continues to increase in accumulative amounts of 1+ inches of rain through Tuesday morning with the focus west of I- 29.
- An active pattern aloft will lead to additional rain chances from Tuesday n...
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