National Weather Service Forecast for: Yankton SD
Issued by: National Weather Service Sioux Falls, SD
Updated: 3:03 pm CDT Jul 28, 2026
 
Tonight

Tonight: Patchy smoke. Mostly clear, with a low around 70. East southeast wind 5 to 10 mph.
Patchy Smoke

 Wednesday

Wednesday: Patchy smoke. Sunny and hot, with a high near 95. South southeast wind 5 to 15 mph.
Patchy Smoke

 Wednesday
Night
Wednesday Night: A 40 percent chance of showers and thunderstorms after 1am. Patchy smoke. Mostly clear, then becoming mostly cloudy toward daybreak, with a low around 71. South southeast wind 10 to 15 mph, with gusts as high as 20 mph.
Patchy Smoke
then Chance
T-storms
 Thursday

Thursday: Showers and possibly a thunderstorm. Patchy smoke before 8am. High near 87. South southeast wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%.
Showers

 Thursday
Night
Thursday Night: Showers and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms between 1am and 4am, then a chance of showers after 4am. Some of the storms could produce heavy rainfall. Low around 67. South southeast wind 5 to 15 mph becoming west northwest after midnight. Chance of precipitation is 90%.
Heavy Rain

 Friday

Friday: Partly sunny, with a high near 85. Breezy, with a north northwest wind 15 to 20 mph, with gusts as high as 30 mph.
Partly Sunny
and Breezy
 Friday
Night
Friday Night: Mostly clear, with a low around 62.
Mostly Clear

 Saturday

Saturday: Sunny, with a high near 83.
Sunny

 Saturday
Night
Saturday Night: Clear, with a low around 63.
Clear
Lo 70 °F Hi 95 °F Lo 71 °F Hi 87 °F Lo 67 °F Hi 85 °F Lo 62 °F Hi 83 °F Lo 63 °F

Hazardous Weather Outlook
 

Tonight
 
 Patchy smoke. Mostly clear, with a low around 70. East southeast wind 5 to 10 mph.
Wednesday
 
 Patchy smoke. Sunny and hot, with a high near 95. South southeast wind 5 to 15 mph.
Wednesday Night
 
 A 40 percent chance of showers and thunderstorms after 1am. Patchy smoke. Mostly clear, then becoming mostly cloudy toward daybreak, with a low around 71. South southeast wind 10 to 15 mph, with gusts as high as 20 mph.
Thursday
 
 Showers and possibly a thunderstorm. Patchy smoke before 8am. High near 87. South southeast wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%.
Thursday Night
 
 Showers and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms between 1am and 4am, then a chance of showers after 4am. Some of the storms could produce heavy rainfall. Low around 67. South southeast wind 5 to 15 mph becoming west northwest after midnight. Chance of precipitation is 90%.
Friday
 
 Partly sunny, with a high near 85. Breezy, with a north northwest wind 15 to 20 mph, with gusts as high as 30 mph.
Friday Night
 
 Mostly clear, with a low around 62.
Saturday
 
 Sunny, with a high near 83.
Saturday Night
 
 Clear, with a low around 63.
Sunday
 
 Sunny, with a high near 85.
Sunday Night
 
 Mostly clear, with a low around 66.
Monday
 
 Mostly sunny, with a high near 89. Breezy.
Monday Night
 
 Partly cloudy, with a low around 66.
Tuesday
 
 Partly sunny, with a high near 84.

 

Forecast from NOAA-NWS for Yankton SD.