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

91°F

33°C

Humidity 61%
Wind Speed E 8 mph
Barometer 29.87 in (1011.6 mb)
Dewpoint 76°F (24°C)
Visibility 10.00 mi
Heat Index103°F (39°C)
Last update 4 Sep 6:56 pm CDT
Extended Forecast for

Yankton SD

  • Tonight

    Tonight: A 10 percent chance of showers and thunderstorms after 5am. Mostly clear, with a low around 72. East wind 5 to 10 mph.

    Low: 72 °F

    Mostly Clear
    then Slight
    Chance
    T-storms

  • Saturday

    Saturday: A 50 percent chance of showers and thunderstorms before 1pm. Mostly cloudy, then gradually becoming sunny and hot, with a high near 96. Heat index values as high as 104. North wind 5 to 10 mph becoming south in the afternoon. Winds could gust as high as 20 mph.

    High: 96 °F

    Chance
    T-storms then
    Chance
    Showers

  • Saturday Night

    Saturday Night: A 30 percent chance of showers and thunderstorms, mainly after 4am. Mostly cloudy, with a low around 72. Southeast wind around 5 mph.

    Low: 72 °F

    Partly Cloudy
    then Chance
    Showers

  • Sunday

    Sunday: A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 92. Southeast wind 5 to 15 mph, with gusts as high as 20 mph.

    High: 92 °F

    Chance
    Showers then
    Chance
    T-storms

  • Sunday Night

    Sunday Night: A 40 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 71. Southeast wind around 10 mph, with gusts as high as 20 mph.

    Low: 71 °F

    Mostly Cloudy
    then Chance
    Showers

  • Labor Day

    Labor Day: A slight chance of showers and thunderstorms before 10am, then a slight chance of showers between 10am and 1pm. Partly sunny, with a high near 93. Breezy, with a south southeast wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 20%.

    High: 93 °F

    Slight Chance
    T-storms then
    Slight Chance
    Showers and
    Breezy

  • Monday Night

    Monday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 74. Chance of precipitation is 70%.

    Low: 74 °F

    Chance
    T-storms then
    Showers
    Likely

  • Tuesday

    Tuesday: A 30 percent chance of showers before 1pm. Partly sunny, with a high near 91.

    High: 91 °F

    Chance
    Showers

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 64.

    Low: 64 °F

    Mostly Clear

Detailed Forecast

Tonight
A 10 percent chance of showers and thunderstorms after 5am. Mostly clear, with a low around 72. East wind 5 to 10 mph.
Saturday
A 50 percent chance of showers and thunderstorms before 1pm. Mostly cloudy, then gradually becoming sunny and hot, with a high near 96. Heat index values as high as 104. North wind 5 to 10 mph becoming south in the afternoon. Winds could gust as high as 20 mph.
Saturday Night
A 30 percent chance of showers and thunderstorms, mainly after 4am. Mostly cloudy, with a low around 72. Southeast wind around 5 mph.
Sunday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 92. Southeast wind 5 to 15 mph, with gusts as high as 20 mph.
Sunday Night
A 40 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 71. Southeast wind around 10 mph, with gusts as high as 20 mph.
Labor Day
A slight chance of showers and thunderstorms before 10am, then a slight chance of showers between 10am and 1pm. Partly sunny, with a high near 93. Breezy, with a south southeast wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 20%.
Monday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 74. Chance of precipitation is 70%.
Tuesday
A 30 percent chance of showers before 1pm. Partly sunny, with a high near 91.
Tuesday Night
Mostly clear, with a low around 64.
Wednesday
Mostly sunny, with a high near 87.
Wednesday Night
Partly cloudy, with a low around 61.
Thursday
Mostly sunny, with a high near 85.
Thursday Night
Partly cloudy, with a low around 63.
Friday
Mostly sunny, with a high near 88.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Yankton SD
 42.88°N 97.4°W (Elev. 1204 ft)
Last Update:
6:18 pm CDT Sep 4, 2026
Forecast Valid:
7pm CDT Sep 4, 2026-6pm CDT Sep 11, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation