National Weather Service Forecast for: Yankton SD
Issued by: National Weather Service Sioux Falls, SD
Updated: 7:28 pm CDT Jun 18, 2026
 
Tonight

Tonight: Increasing clouds, with a low around 54. North wind around 5 mph becoming calm.
Increasing
Clouds
 Juneteenth

Juneteenth: A slight chance of showers between 9am and 2pm. Cloudy, then gradually becoming mostly sunny, with a high near 82. South wind 5 to 10 mph becoming west northwest in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 20%.
Slight Chance
Showers
 Friday
Night
Friday Night: Partly cloudy, with a low around 55. West northwest wind 5 to 10 mph becoming light and variable after midnight.
Partly Cloudy

 Saturday

Saturday: A 40 percent chance of showers after 1pm. Increasing clouds, with a high near 84. East southeast wind 5 to 10 mph.
Mostly Sunny
then Chance
Showers
 Saturday
Night
Saturday Night: Showers, with thunderstorms also possible after 4am. Low around 58. East wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%.
Showers

 Sunday

Sunday: Showers likely and possibly a thunderstorm before 7am, then showers likely between 7am and 1pm, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 73. Breezy, with an east wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 70%.
Showers
Likely and
Breezy
 Sunday
Night
Sunday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 54. Chance of precipitation is 40%.
Chance
T-storms
 Monday

Monday: Partly sunny, with a high near 76.
Partly Sunny

 Monday
Night
Monday Night: Partly cloudy, with a low around 56.
Partly Cloudy
Lo 54 °F Hi 82 °F Lo 55 °F Hi 84 °F Lo 58 °F Hi 73 °F Lo 54 °F Hi 76 °F Lo 56 °F

 

Tonight
 
 Increasing clouds, with a low around 54. North wind around 5 mph becoming calm.
Juneteenth
 
 A slight chance of showers between 9am and 2pm. Cloudy, then gradually becoming mostly sunny, with a high near 82. South wind 5 to 10 mph becoming west northwest in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 20%.
Friday Night
 
 Partly cloudy, with a low around 55. West northwest wind 5 to 10 mph becoming light and variable after midnight.
Saturday
 
 A 40 percent chance of showers after 1pm. Increasing clouds, with a high near 84. East southeast wind 5 to 10 mph.
Saturday Night
 
 Showers, with thunderstorms also possible after 4am. Low around 58. East wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%.
Sunday
 
 Showers likely and possibly a thunderstorm before 7am, then showers likely between 7am and 1pm, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 73. Breezy, with an east wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 70%.
Sunday Night
 
 A chance of showers and thunderstorms. Mostly cloudy, with a low around 54. Chance of precipitation is 40%.
Monday
 
 Partly sunny, with a high near 76.
Monday Night
 
 Partly cloudy, with a low around 56.
Tuesday
 
 A 40 percent chance of showers. Partly sunny, with a high near 79.
Tuesday Night
 
 Partly cloudy, with a low around 55.
Wednesday
 
 Mostly sunny, with a high near 81.
Wednesday Night
 
 A 30 percent chance of showers and thunderstorms. Mostly clear, with a low around 56.
Thursday
 
 A 30 percent chance of showers. Partly sunny, with a high near 82.

 

Forecast from NOAA-NWS for Yankton SD.