Erwin, SD Weather Forecast
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Erwin Weather Forecast
| TONIGHT | LABOR DAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY |
| Partly Cloudy | Chance of T-Storm | Chance of T-Storm | Clearing | Mostly Clear | Sunny | Mostly Clear | Sunny | Mostly Clear | Sunny | Mostly Clear | Mostly Sunny |
| Lo: 69°FLo: 21°C | Hi: 85°FHi: 29°C | Lo: 69°FLo: 21°C | Hi: 81°FHi: 27°C | Lo: 59°FLo: 15°C | Hi: 75°FHi: 24°C | Lo: 51°FLo: 11°C | Hi: 81°FHi: 27°C | Lo: 60°FLo: 16°C | Hi: 81°FHi: 27°C | Lo: 55°FLo: 13°C | Hi: 75°FHi: 24°C |
| POP: 20% | POP: 50% |
POP = Probability of Precipitation.
Weather Outlook Updated: 714 PM CDT Sun Sep 06 2026 

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Issued: 939 PM CDT Sun Sep 6 2026
Key Messages
- Scattered showers and thunderstorms will continue for areas south of I-90 through the evening. Showers should remain below severe criteria.
- Isolated to scattered morning showers are possible along and north of I-90. These are not expected to be severe.
- Isolated strong to severe storms will again be possible late Monday afternoon into Tuesday morning. Large hail up to the size of a ping-pong ball, wind gusts of 60 mph, heavy rain are all possible. Though the risk is low, an isolated t...
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