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Lake Yankton Weather Forecast
| TODAY | TONIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT |
 |  |  |  | | | |  | | | | |
| Mostly Sunny | Partly Cloudy | Chance of T-Storm | Chance of T-Storm | Sunny | Chance of T-Storm | Sunny | Mostly Clear | Sunny | Partly Cloudy | Mostly Sunny | Partly Cloudy |
| Hi: 90°FHi: 32°C | Lo: 69°FLo: 21°C | Hi: 89°FHi: 32°C | Lo: 65°FLo: 18°C | Hi: 89°FHi: 32°C | Lo: 69°FLo: 21°C | Hi: 91°FHi: 33°C | Lo: 70°FLo: 21°C | Hi: 95°FHi: 35°C | Lo: 71°FLo: 22°C | Hi: 91°FHi: 33°C | Lo: 71°FLo: 22°C |
| POP: 40% | POP: 70% | POP: 30% |
POP = Probability of Precipitation.
Weather Outlook Updated: 349 AM CDT Mon Aug 31 2026 
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Issued: 625 AM CDT Mon Aug 31 2026
Key Messages
- A few sprinkles to very light showers will be possible mainly across northwestern IA during the morning hours. Any accumulations will be limited.
- More concrete chances for showers and storms (60%-80%) return by Tuesday. While a few stronger storms will be possible, the finer details remain uncertain. Continue to monitor your local forecast for the latest information.
- Near to above normal temperatures look to continue through the entirety of this week. Chances (20-40%) are possible on...