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Swan Lake, SD Weather Forecast
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Swan Lake Weather Forecast
| REST OF TODAY | TONIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT |
 |  |  | | |  | |  |  |  |  | |
| Chance of T-Storm | Partly Cloudy | Sunny | Partly Cloudy | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of Showers | Mostly Cloudy | Mostly Cloudy | Chance of Showers | Chance of Showers |
| Hi: 75°FHi: 24°C | Lo: 61°FLo: 16°C | Hi: 79°FHi: 26°C | Lo: 59°FLo: 15°C | Hi: 81°FHi: 27°C | Lo: 61°FLo: 16°C | Hi: 79°FHi: 26°C | Lo: 59°FLo: 15°C | Hi: 75°FHi: 24°C | Lo: 55°FLo: 13°C | Hi: 75°FHi: 24°C | Lo: 59°FLo: 15°C |
| POP: 90% | POP: 40% | POP: 40% | POP: 60% | POP: 50% | POP: 30% | POP: 30% |
POP = Probability of Precipitation.
Weather Outlook Updated: 1059 AM CDT Sat Aug 15 2026 
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Swan Lake Forecast Discussion
Issued: 1214 PM CDT Sat Aug 15 2026
Key Messages
- Scattered showers and a few storms are expected this afternoon. Locally heavy rainfall is the main concern, but a wind gust to 45 mph can`t be ruled out in the a stronger storm.
- Next chances for rain and storms return Monday night into Tuesday night. Isolated severe storms and pockets of heavy rain are possible.
Discussion
... Issued at 1236 PM CDT Fri Aug 14 2026
Low pressure continues to track east northeast into western IA through this afternoon. Scatter...