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

96°F

36°C

Humidity 49%
Wind Speed S 16 G 25 mph
Barometer 29.53 in (999.6 mb)
Dewpoint 74°F (23°C)
Visibility 10.00 mi
Heat Index107°F (42°C)
Last update 20 Jun 2:56 pm CDT
Extended Forecast for

4 Miles SE Mayfield SD

Extreme Heat Warning until June 22, 09:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning until June 22, 09:00pm

    NOW until 9:00pm Sun

    Extreme Heat Warning

  • This Afternoon

    High: 98 °F

    Hot and
    Breezy

  • Tonight

    Tonight: Increasing clouds, with a low around 78. Breezy, with a south wind 20 to 25 mph, with gusts as high as 40 mph.

    Low: 78 °F

    Increasing
    Clouds and
    Breezy

  • Saturday

    Saturday: Sunny and hot, with a high near 104. Heat index values as high as 109. Breezy, with a south southwest wind 20 to 25 mph, with gusts as high as 30 mph.

    High: 104 °F

    Hot and
    Breezy

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 79. Breezy, with a south wind around 20 mph, with gusts as high as 30 mph.

    Low: 79 °F

    Mostly Clear
    and Breezy

  • Sunday

    Sunday: Sunny and hot, with a high near 99. Windy, with a south wind 20 to 30 mph, with gusts as high as 40 mph.

    High: 99 °F

    Hot and Windy

  • Sunday Night

    Sunday Night: Showers and thunderstorms likely before 1am, then showers likely and possibly a thunderstorm after 1am. Increasing clouds, with a low around 66. Breezy, with a south southwest wind 15 to 20 mph becoming northwest after midnight. Winds could gust as high as 30 mph. Chance of precipitation is 70%.

    Low: 66 °F

    T-storms
    Likely and
    Breezy

  • Monday

    Monday: Partly sunny, with a high near 80.

    High: 80 °F

    Partly Sunny

  • Monday Night

    Monday Night: A 50 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 61.

    Low: 61 °F

    Partly Cloudy
    then Chance
    T-storms

Detailed Forecast

This Afternoon
Sunny and hot, with a high near 98. Heat index values as high as 107. Breezy, with a south wind around 25 mph, with gusts as high as 35 mph.
Tonight
Increasing clouds, with a low around 78. Breezy, with a south wind 20 to 25 mph, with gusts as high as 40 mph.
Saturday
Sunny and hot, with a high near 104. Heat index values as high as 109. Breezy, with a south southwest wind 20 to 25 mph, with gusts as high as 30 mph.
Saturday Night
Mostly clear, with a low around 79. Breezy, with a south wind around 20 mph, with gusts as high as 30 mph.
Sunday
Sunny and hot, with a high near 99. Windy, with a south wind 20 to 30 mph, with gusts as high as 40 mph.
Sunday Night
Showers and thunderstorms likely before 1am, then showers likely and possibly a thunderstorm after 1am. Increasing clouds, with a low around 66. Breezy, with a south southwest wind 15 to 20 mph becoming northwest after midnight. Winds could gust as high as 30 mph. Chance of precipitation is 70%.
Monday
Partly sunny, with a high near 80.
Monday Night
A 50 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 61.
Tuesday
Showers likely, with thunderstorms also possible after 1pm. Cloudy, with a high near 75. Chance of precipitation is 70%.
Tuesday Night
Showers and possibly a thunderstorm. Low around 65. Chance of precipitation is 90%.
Wednesday
Showers and possibly a thunderstorm. High near 79. Chance of precipitation is 80%.
Wednesday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 64. Chance of precipitation is 70%.
Thursday
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 79.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SE Mayfield SD
 43.06°N 97.25°W (Elev. 1378 ft)
Last Update:
2:31 pm CDT Jun 20, 2025
Forecast Valid:
3pm CDT Jun 20, 2025-6pm CDT Jun 26, 2025
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation