National Weather Service Forecast for: Yankton SD
Issued by: National Weather Service Sioux Falls, SD
Updated: 6:27 am CDT Jun 22, 2026
 
Today

Today: Patchy fog before 7am. Otherwise, partly sunny, with a high near 76. Calm wind becoming south southeast around 5 mph in the afternoon.
Patchy Fog
then Partly
Sunny
 Tonight

Tonight: A 10 percent chance of showers after 5am. Mostly cloudy, with a low around 58. Southeast wind 5 to 10 mph.
Partly Cloudy
then Slight
Chance
Showers
 Tuesday

Tuesday: Showers and thunderstorms likely, mainly before 2pm, then showers likely and possibly a thunderstorm after 4pm. Cloudy, then gradually becoming mostly sunny, with a high near 79. South wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Showers
Likely

 Tuesday
Night
Tuesday Night: Showers likely and possibly a thunderstorm before 7pm, then a chance of showers and thunderstorms between 7pm and 1am. Partly cloudy, with a low around 57. West southwest wind 5 to 10 mph. Chance of precipitation is 60%.
Showers
Likely

 Wednesday

Wednesday: Mostly sunny, with a high near 80. Northwest wind 5 to 15 mph, with gusts as high as 20 mph.
Mostly Sunny

 Wednesday
Night
Wednesday Night: A 20 percent chance of showers before 1am. Mostly cloudy, with a low around 55. North northwest wind 10 to 15 mph becoming light after midnight.
Slight Chance
Showers

 Thursday

Thursday: Mostly sunny, with a high near 79.
Mostly Sunny

 Thursday
Night
Thursday Night: A 30 percent chance of showers after 1am. Partly cloudy, with a low around 57.
Partly Cloudy
then Chance
Showers
 Friday

Friday: A 50 percent chance of showers before 1pm. Mostly cloudy, with a high near 79.
Chance
Showers
Hi 76 °F Lo 58 °F Hi 79 °F Lo 57 °F Hi 80 °F Lo 55 °F Hi 79 °F Lo 57 °F Hi 79 °F

Hazardous Weather Outlook
 

Today
 
 Patchy fog before 7am. Otherwise, partly sunny, with a high near 76. Calm wind becoming south southeast around 5 mph in the afternoon.
Tonight
 
 A 10 percent chance of showers after 5am. Mostly cloudy, with a low around 58. Southeast wind 5 to 10 mph.
Tuesday
 
 Showers and thunderstorms likely, mainly before 2pm, then showers likely and possibly a thunderstorm after 4pm. Cloudy, then gradually becoming mostly sunny, with a high near 79. South wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tuesday Night
 
 Showers likely and possibly a thunderstorm before 7pm, then a chance of showers and thunderstorms between 7pm and 1am. Partly cloudy, with a low around 57. West southwest wind 5 to 10 mph. Chance of precipitation is 60%.
Wednesday
 
 Mostly sunny, with a high near 80. Northwest wind 5 to 15 mph, with gusts as high as 20 mph.
Wednesday Night
 
 A 20 percent chance of showers before 1am. Mostly cloudy, with a low around 55. North northwest wind 10 to 15 mph becoming light after midnight.
Thursday
 
 Mostly sunny, with a high near 79.
Thursday Night
 
 A 30 percent chance of showers after 1am. Partly cloudy, with a low around 57.
Friday
 
 A 50 percent chance of showers before 1pm. Mostly cloudy, with a high near 79.
Friday Night
 
 Mostly cloudy, with a low around 62.
Saturday
 
 Mostly cloudy, with a high near 87. Breezy.
Saturday Night
 
 A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 69. Breezy.
Sunday
 
 Mostly sunny, with a high near 92.

 

Forecast from NOAA-NWS for Yankton SD.