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.

A Few Clouds

80°F

27°C

Humidity 100%
Wind Speed NE 6 mph
Barometer 29.75 in (1007.0 mb)
Dewpoint 80°F (27°C)
Visibility 8.00 mi
Heat Index87°F (31°C)
Last update 27 Jul 2:56 am CDT
Extended Forecast for

Yankton SD

Heat Advisory until July 27, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory until July 27, 08:00pm

    NOW until 8:00pm Mon

    Heat Advisory

  • Overnight

    Low: 76 °F

    Mostly Clear

  • Monday

    Monday: Patchy smoke after 2pm. Mostly sunny and hot, with a high near 100. North northwest wind 5 to 15 mph becoming east northeast in the afternoon. Winds could gust as high as 20 mph.

    High: 100 °F

    Mostly Sunny
    then Patchy
    Smoke

  • Monday Night

    Monday Night: Areas of smoke. Increasing clouds, with a low around 72. Northeast wind 5 to 10 mph becoming north northwest after midnight.

    Low: 72 °F

    Areas Smoke

  • Tuesday

    Tuesday: Patchy smoke before 8am. Cloudy, then gradually becoming mostly sunny, with a high near 92. Northeast wind around 5 mph becoming southeast in the afternoon.

    High: 92 °F

    Patchy Smoke
    then Partly
    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 69. Southeast wind 5 to 10 mph.

    Low: 69 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny and hot, with a high near 95. South southeast wind 5 to 10 mph.

    High: 95 °F

    Hot

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 71.

    Low: 71 °F

    Partly Cloudy
    then Chance
    T-storms

  • Thursday

    Thursday: Showers likely, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 91. Chance of precipitation is 60%.

    High: 91 °F

    Showers
    Likely

Detailed Forecast

Overnight
Mostly clear, with a low around 76. East wind around 5 mph becoming north.
Monday
Patchy smoke after 2pm. Mostly sunny and hot, with a high near 100. North northwest wind 5 to 15 mph becoming east northeast in the afternoon. Winds could gust as high as 20 mph.
Monday Night
Areas of smoke. Increasing clouds, with a low around 72. Northeast wind 5 to 10 mph becoming north northwest after midnight.
Tuesday
Patchy smoke before 8am. Cloudy, then gradually becoming mostly sunny, with a high near 92. Northeast wind around 5 mph becoming southeast in the afternoon.
Tuesday Night
Partly cloudy, with a low around 69. Southeast wind 5 to 10 mph.
Wednesday
Mostly sunny and hot, with a high near 95. South southeast wind 5 to 10 mph.
Wednesday Night
A 30 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 71.
Thursday
Showers likely, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 91. Chance of precipitation is 60%.
Thursday Night
Showers likely and possibly a thunderstorm before 1am, then a chance of showers. Partly cloudy, with a low around 68. Chance of precipitation is 70%.
Friday
Mostly sunny, with a high near 86.
Friday Night
Mostly clear, with a low around 65.
Saturday
Mostly sunny, with a high near 87.
Saturday Night
Mostly clear, with a low around 66.
Sunday
Mostly sunny, with a high near 90.
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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:
1:33 am CDT Jul 27, 2026
Forecast Valid:
3am CDT Jul 27, 2026-6pm CDT Aug 2, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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