Culvert Lake, SD Weather Forecast
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Culvert Lake Weather Forecast
| TODAY | TONIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT |
| Partly Sunny | Chance of Showers | Chance of Showers | Chance of Showers | Chance of T-Storm | Clearing | Mostly Sunny | Mostly Cloudy | Chance of Showers | Partly Cloudy | Partly Cloudy | Chance of Showers |
| Hi: 71°FHi: 22°C | Lo: 50°FLo: 10°C | Hi: 65°FHi: 18°C | Lo: 51°FLo: 11°C | Hi: 69°FHi: 21°C | Lo: 51°FLo: 11°C | Hi: 69°FHi: 21°C | Lo: 49°FLo: 9°C | Hi: 69°FHi: 21°C | Hi: 71°FHi: 22°C Lo: 50°FLo: 10°C | Hi: 71°FHi: 22°C Lo: 50°FLo: 10°C | Lo: 51°FLo: 11°C |
| POP: 40% | POP: 40% | POP: 40% | POP: 100% | POP: 30% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 521 AM CDT Sat Sep 12 2026 

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Issued: 221 AM CDT Sat Sep 12 2026
Key Messages
- Cooler temperatures take hold this weekend, with highs in the 60s to low 70s expected. This trend will continue through the start of next week, with the possible exception of a brief warmup to near- normal on Monday.
- Additional chances for rain showers to perhaps weak thunderstorms come Sunday and Monday mornings. Over both days, much of the forecast area will see between half and inch and an inch of rainfall in total.
Discussion
... Issued at 220 AM CDT Sat Sep 12 2026
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