Sully Lake, SD 7-Day Weather Forecast
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Sully Lake Weather Forecast


Sully Lake, SD Weather Forecast Date: 322 PM CDT Wed Sep 16 2026
Weather forecast for Sully Lake, SD
| Tonight Lo: 51°F Lo: 11°C |
Tonight... Partly cloudy. Lows in the lower 50s. East winds 5 to 10 mph. |
| Thu Hi: 75°FHi: 24°C Lo: 59°F Lo: 15°C |
Thursday... Partly sunny in the morning, then becoming mostly cloudy. Highs in the mid 70s. East winds 10 to 15 mph with gusts up to 25 mph. |
| Fri Hi: 70°FHi: 21°C Lo: 55°F Lo: 13°C |
Friday... Showers likely with a slight chance of thunderstorms in the morning. Highs around 70. East winds 15 to 20 mph, becoming north in the afternoon. Chance of rain 70%. |
| Sat Hi: 69°FHi: 21°C Lo: 51°F Lo: 11°C |
Saturday... Cloudy. Highs in the upper 60s. |
| Sun Hi: 65°FHi: 18°C Lo: 51°F Lo: 11°C |
Sunday... Cloudy with a 50% chance of showers. Highs in the mid 60s. |
| Mon Hi: 65°FHi: 18°C Lo: 51°F Lo: 11°C |
Monday... Mostly cloudy with a 50% chance of showers. Lows in the lower 50s. Highs in the mid 60s. |
| Tue Hi: 71°FHi: 22°C Lo: 51°F Lo: 11°C |
Tuesday... Partly sunny. Highs in the lower 70s. |
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