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Deans Lake, SD Weather Forecast
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Deans Lake Weather Forecast
| THIS AFTERNOON | TONIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT |
 |  | |  | | |  |  | | |  | |
| Sunny | Clear | Sunny | Partly Cloudy | Sunny | Partly Cloudy | Windy | Mostly Cloudy | Mostly Sunny | Mostly Cloudy | Partly Sunny | Mostly Cloudy |
| Hi: 71°FHi: 22°C | Lo: 45°FLo: 7°C | Hi: 71°FHi: 22°C | Lo: 49°FLo: 9°C | Hi: 79°FHi: 26°C | Lo: 59°FLo: 15°C | Hi: 75°FHi: 24°C | Lo: 55°FLo: 13°C | Hi: 61°FHi: 16°C | Lo: 40°FLo: 4°C | Hi: 55°FHi: 13°C | Lo: 39°FLo: 4°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 134 PM CDT Tue Oct 20 2026 
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Issued: 1234 PM CDT Tue Oct 20 2026
Key Messages
- Above to well above average temperatures continue. Highs in the upper 60s and 70s and lows in the 40s and 50s. Average highs for mid/late October are upper 50s to lower 60s, with average lows in the mid to upper 30s.
- Dry conditions are expected through Thursday evening. Low (25% or less) rain chances return Friday morning with more widespread and higher chances (around 50%) this weekend.
- Warm, dry, and breezy conditions lead to localized elevated fire danger, with more widespread con...