10-Day Weather Forecast - Yankton, SD

Mostly sunny. A chance of showers and thunderstorms in the morning. Humid with highs in the upper 80s. Southeast winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 50 percent. Heat index values in the upper 90s in the afternoon.

Partly cloudy with a slight chance of showers and thunderstorms. Humid with lows around 70. Southeast winds 5 to 10 mph. Chance of rain 20 percent.

Sunny with highs around 90. Southeast winds 10 to 15 mph with gusts up to 25 mph. Heat index values up to 104 in the afternoon.

Partly cloudy. Lows in the lower 70s. Heat index values up to 100 early in the evening.

Mostly sunny. Highs in the lower 90s. Heat index values up to 105 in the afternoon.

Partly cloudy in the evening then mostly cloudy with a chance of showers and thunderstorms after midnight. Lows in the upper 60s. Chance of rain 30 percent. Heat index values up to 105 early in the evening.

Partly sunny. Highs in the mid 80s.

Partly cloudy with a chance of showers and thunderstorms. Lows in the lower 60s. Chance of rain 30 percent.

Mostly sunny. Highs in the mid 80s.

Partly cloudy. Lows in the mid 60s.

Mostly sunny. Highs in the mid 80s.

Partly cloudy. Low temperature around 65F. Dew point will be around 63F with an average humidity of 76%. Winds will be 4 mph from the SW.

Sunny. High temperature around 84F. Dew point will be around 66F with an average humidity of 69%. Winds will be 2 mph from the S.

Clear. Low temperature around 68F. Dew point will be around 67F with an average humidity of 81%. Winds will be 7 mph from the SE.

Sunny. High temperature around 86F. Dew point will be around 70F with an average humidity of 73%. Winds will be 6 mph from the S.

Clear. Low temperature around 70F. Dew point will be around 70F with an average humidity of 81%. Winds will be 7 mph from the S.

Sunny. High temperature around 88F. Dew point will be around 70F with an average humidity of 70%. Winds will be 4 mph from the S.

Clear. Low temperature around 70F. Dew point will be around 69F with an average humidity of 75%. Winds will be 6 mph from the S.