10-Day Weather Forecast - Yankton, SD

Mostly sunny. A chance of showers and thunderstorms in the afternoon. Humid with highs in the lower 90s. South winds around 10 mph becoming southwest in the afternoon. Chance of rain 50 percent. Heat index values in the upper 90s.

Showers likely with a chance of thunderstorms in the evening then a chance of showers with a slight chance of thunderstorms after midnight. Humid with lows in the upper 60s. Northwest winds 5 to 10 mph. Chance of rain 60 percent.

Mostly cloudy in the morning then becoming mostly sunny. A slight chance of showers and thunderstorms. Humid with highs in the mid 80s. North winds 5 to 10 mph. Chance of rain 20 percent.

Partly cloudy. Lows in the mid 60s.

Mostly sunny. Highs in the upper 80s.

Mostly clear. Lows in the upper 60s.

Sunny. Highs in the lower 90s. Heat index values up to 100 in the afternoon.

Mostly clear. Lows in the lower 70s. Heat index values up to 100 early in the evening.

Sunny. Highs in the mid 90s. Heat index values up to 105 in the afternoon.

Mostly clear. Lows in the lower 70s. Heat index values up to 105 early in the evening.

Sunny hot with highs in the mid 90s. Heat index values up to 110 in the afternoon.

Mostly clear with a slight chance of rain. Chance of precipitation 25%. Low temperature around 75F. Dew point will be around 74F with an average humidity of 77%. Winds will be 5 mph from the E.

Sunny with a 30% chance for rain and thunderstorms. High temperature around 88F. Dew point will be around 70F with an average humidity of 69%. Winds will be 2 mph from the E.

Clear with a chance of rain. Chance of precipitation 35%. Low temperature around 69F. Dew point will be around 70F with an average humidity of 84%. Winds will be 5 mph from the E.

Mostly sunny with a chance of rain. Chance of precipitation 35%. High temperature around 82F. Dew point will be around 69F with an average humidity of 75%. Winds will be 7 mph from the SE.

Mostly clear with a chance of rain. Chance of precipitation 40%. Low temperature around 67F. Dew point will be around 68F with an average humidity of 86%. Winds will be 9 mph from the SE.

Mostly sunny with a chance of rain. Chance of precipitation 40%. High temperature around 78F. Dew point will be around 68F with an average humidity of 80%. Winds will be 10 mph from the SE.

Mostly clear with a slight chance of rain. Chance of precipitation 30%. Low temperature around 67F. Dew point will be around 67F with an average humidity of 88%. Winds will be 10 mph from the SE.