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Yankton Weather Forecast
| TODAY | TONIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT |
 |  |  |  |  |  |  |  | | | | |
| Clearing | Partly Cloudy | Partly Sunny | Chance of Showers | Chance of Showers | Chance of T-Storm | Chance of T-Storm | Chance of Showers | Mostly Cloudy | Partly Cloudy | Partly Sunny | Partly Cloudy |
| Hi: 71°FHi: 22°C | Lo: 51°FLo: 11°C | Hi: 70°FHi: 21°C | Lo: 59°FLo: 15°C | Hi: 75°FHi: 24°C | Lo: 61°FLo: 16°C | Hi: 80°FHi: 27°C | Lo: 61°FLo: 16°C | Hi: 71°FHi: 22°C | Lo: 55°FLo: 13°C | Hi: 69°FHi: 21°C | Lo: 51°FLo: 11°C |
| POP: 20% | POP: 50% | POP: 90% | POP: 70% | POP: 50% |
POP = Probability of Precipitation.
Weather Outlook Updated: 254 AM CDT Tue Sep 15 2026 
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Issued: 1255 AM CDT Tue Sep 15 2026
Key Messages
- Dense fog continues early this morning in east-central South Dakota and adjacent areas of southwest Minnesota. Fog should dissipate by 4-5 am as drier air moves in.
- A few additional thunderstorms may develop into early this morning along Highway 20, capable of mainly small hail. There is a very low (5% or less) chance of a quarter sized hailstone in the strongest storms.
- Near normal temperatures continues the rest of the week with low rain chances on Wednesday, but significantly high...