National Weather Service Forecast for: Yankton SD
Issued by: National Weather Service Sioux Falls, SD
Updated: 1:53 am CDT Jun 30, 2026
 
Overnight

Overnight: Showers likely and possibly a thunderstorm before 4am, then a chance of showers. Mostly cloudy, with a low around 68. South southwest wind around 5 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Showers
Likely

 Tuesday

Tuesday: Sunny and hot, with a high near 96. West wind around 5 mph.
Hot

 Tuesday
Night
Tuesday Night: A chance of showers and thunderstorms before 4am, then showers likely and possibly a thunderstorm between 4am and 5am, then a chance of showers and thunderstorms after 5am. Increasing clouds, with a low around 69. South wind around 5 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Partly Cloudy
then Showers
Likely
 Wednesday

Wednesday: Rain and thunderstorms likely before 2pm, then a chance of rain after 3pm. Mostly cloudy, then gradually becoming sunny, with a high near 93. Southeast wind around 10 mph becoming west southwest in the afternoon. Chance of precipitation is 60%.
Showers
Likely then
Mostly Sunny
 Wednesday
Night
Wednesday Night: A chance of rain and thunderstorms before 7pm, then a slight chance of showers and thunderstorms between 7pm and 1am. Partly cloudy, with a low around 68. West wind 5 to 10 mph becoming light and variable in the evening. Chance of precipitation is 20%.
Chance
Showers then
Slight Chance
T-storms
 Thursday

Thursday: A 50 percent chance of showers and thunderstorms after 1pm. Mostly sunny and hot, with a high near 95. South southeast wind 5 to 10 mph increasing to 10 to 15 mph in the afternoon. Winds could gust as high as 25 mph.
Partly Sunny
then Chance
T-storms
 Thursday
Night
Thursday Night: Showers likely and possibly a thunderstorm before 1am. Partly cloudy, with a low around 70. Chance of precipitation is 70%.
Showers
Likely

 Friday

Friday: Mostly sunny and hot, with a high near 96.
Hot

 Friday
Night
Friday Night: Showers likely and possibly a thunderstorm before 1am, then a chance of showers. Partly cloudy, with a low around 72. Chance of precipitation is 60%.
Showers
Likely
Lo 68 °F Hi 96 °F Lo 69 °F Hi 93 °F Lo 68 °F Hi 95 °F Lo 70 °F Hi 96 °F Lo 72 °F

Hazardous Weather Outlook
Severe Thunderstorm Watch
 

Overnight
 
 Showers likely and possibly a thunderstorm before 4am, then a chance of showers. Mostly cloudy, with a low around 68. South southwest wind around 5 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tuesday
 
 Sunny and hot, with a high near 96. West wind around 5 mph.
Tuesday Night
 
 A chance of showers and thunderstorms before 4am, then showers likely and possibly a thunderstorm between 4am and 5am, then a chance of showers and thunderstorms after 5am. Increasing clouds, with a low around 69. South wind around 5 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday
 
 Rain and thunderstorms likely before 2pm, then a chance of rain after 3pm. Mostly cloudy, then gradually becoming sunny, with a high near 93. Southeast wind around 10 mph becoming west southwest in the afternoon. Chance of precipitation is 60%.
Wednesday Night
 
 A chance of rain and thunderstorms before 7pm, then a slight chance of showers and thunderstorms between 7pm and 1am. Partly cloudy, with a low around 68. West wind 5 to 10 mph becoming light and variable in the evening. Chance of precipitation is 20%.
Thursday
 
 A 50 percent chance of showers and thunderstorms after 1pm. Mostly sunny and hot, with a high near 95. South southeast wind 5 to 10 mph increasing to 10 to 15 mph in the afternoon. Winds could gust as high as 25 mph.
Thursday Night
 
 Showers likely and possibly a thunderstorm before 1am. Partly cloudy, with a low around 70. Chance of precipitation is 70%.
Friday
 
 Mostly sunny and hot, with a high near 96.
Friday Night
 
 Showers likely and possibly a thunderstorm before 1am, then a chance of showers. Partly cloudy, with a low around 72. Chance of precipitation is 60%.
Independence Day
 
 Partly sunny, with a high near 94.
Saturday Night
 
 Showers likely and possibly a thunderstorm. Partly cloudy, with a low around 67. Chance of precipitation is 70%.
Sunday
 
 Partly sunny, with a high near 90.
Sunday Night
 
 Mostly clear, with a low around 66.
Monday
 
 Mostly sunny, with a high near 92.

 

Forecast from NOAA-NWS for Yankton SD.