National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Yankton, Chan Gurney Municipal Airport (KYKN)

Lat: 42.92°NLon: 97.38°WElev: 1306ft.

Fair

85°F

29°C

Humidity 53%
Wind Speed SE 20 G 26 mph
Barometer 29.97 in (1015.1 mb)
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Heat Index87°F (31°C)
Last update 28 Aug 3:56 pm CDT
Extended Forecast for

Yankton SD

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms, mainly between 1am and 5am. Increasing clouds, with a low around 72. Breezy, with a south southeast wind 15 to 20 mph, with gusts as high as 30 mph.

    Low: 72 °F

    Mostly Cloudy
    and Breezy
    then Chance
    T-storms

  • Saturday

    Saturday: Mostly cloudy, then gradually becoming sunny and hot, with a high near 96. Heat index values as high as 101. South southeast wind 10 to 15 mph becoming southwest in the afternoon. Winds could gust as high as 25 mph.

    High: 96 °F

    Hot

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 72. Southeast wind 5 to 10 mph.

    Low: 72 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly sunny and hot, with a high near 96. Heat index values as high as 100. South wind 5 to 10 mph.

    High: 96 °F

    Hot

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 72. South wind 5 to 10 mph becoming west after midnight.

    Low: 72 °F

    Mostly Cloudy

  • Monday

    Monday: A slight chance of showers and thunderstorms before 10am, then a slight chance of showers between 10am and 1pm, then a slight chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 91. West northwest wind 5 to 10 mph becoming east in the afternoon. Chance of precipitation is 20%.

    High: 91 °F

    Slight Chance
    T-storms

  • Monday Night

    Monday Night: A 40 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 67.

    Low: 67 °F

    Partly Cloudy
    then Chance
    T-storms

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 90.

    High: 90 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: A 40 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 67.

    Low: 67 °F

    Chance
    T-storms

Detailed Forecast

Tonight
A 30 percent chance of showers and thunderstorms, mainly between 1am and 5am. Increasing clouds, with a low around 72. Breezy, with a south southeast wind 15 to 20 mph, with gusts as high as 30 mph.
Saturday
Mostly cloudy, then gradually becoming sunny and hot, with a high near 96. Heat index values as high as 101. South southeast wind 10 to 15 mph becoming southwest in the afternoon. Winds could gust as high as 25 mph.
Saturday Night
Mostly cloudy, with a low around 72. Southeast wind 5 to 10 mph.
Sunday
Mostly sunny and hot, with a high near 96. Heat index values as high as 100. South wind 5 to 10 mph.
Sunday Night
Mostly cloudy, with a low around 72. South wind 5 to 10 mph becoming west after midnight.
Monday
A slight chance of showers and thunderstorms before 10am, then a slight chance of showers between 10am and 1pm, then a slight chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 91. West northwest wind 5 to 10 mph becoming east in the afternoon. Chance of precipitation is 20%.
Monday Night
A 40 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 67.
Tuesday
Mostly cloudy, with a high near 90.
Tuesday Night
A 40 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 67.
Wednesday
Mostly sunny, with a high near 92.
Wednesday Night
Partly cloudy, with a low around 70.
Thursday
Mostly sunny, with a high near 93.
Thursday Night
Partly cloudy, with a low around 68.
Friday
Mostly sunny, with a high near 92.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Yankton SD
 42.88°N 97.4°W (Elev. 1204 ft)
Last Update:
3:53 pm CDT Aug 28, 2026
Forecast Valid:
4pm CDT Aug 28, 2026-6pm CDT Sep 4, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation