National Weather Service Forecast for: Harrisburg 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 69. Southeast wind around 5 mph.
Patchy Smoke


 Wednesday

Wednesday: Patchy smoke. Sunny, with a high near 91. South southeast wind 5 to 10 mph.
Patchy Smoke


 Wednesday
Night
Wednesday Night: A 20 percent chance of showers and thunderstorms after 1am. Patchy smoke. Partly cloudy, with a low around 70. South southeast wind around 10 mph.
Patchy Smoke
then Slight
Chance
T-storms
 Thursday

Thursday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Patchy smoke before 8am. Mostly cloudy, with a high near 83. South southeast wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 70%.
Showers
Likely

 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. Low around 66. South southeast wind 10 to 15 mph becoming west northwest after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 90%.
Showers


 Friday

Friday: A slight chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 81. Breezy, with a north wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 20%.
Breezy.
Slight Chance
Showers then
Slight Chance
T-storms
 Friday
Night
Friday Night: Mostly clear, with a low around 61.
Mostly Clear


 Saturday

Saturday: Sunny, with a high near 80.
Sunny


 Saturday
Night
Saturday Night: Clear, with a low around 62.
Clear
Lo 69 °F Hi 91 °F Lo 70 °F Hi 83 °F Lo 66 °F Hi 81 °F Lo 61 °F Hi 80 °F Lo 62 °F

Hazardous Weather Outlook
 

Tonight
 
 Patchy smoke. Mostly clear, with a low around 69. Southeast wind around 5 mph.
Wednesday
 
 Patchy smoke. Sunny, with a high near 91. South southeast wind 5 to 10 mph.
Wednesday Night
 
 A 20 percent chance of showers and thunderstorms after 1am. Patchy smoke. Partly cloudy, with a low around 70. South southeast wind around 10 mph.
Thursday
 
 A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Patchy smoke before 8am. Mostly cloudy, with a high near 83. South southeast wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 70%.
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. Low around 66. South southeast wind 10 to 15 mph becoming west northwest after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 90%.
Friday
 
 A slight chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 81. Breezy, with a north wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 20%.
Friday Night
 
 Mostly clear, with a low around 61.
Saturday
 
 Sunny, with a high near 80.
Saturday Night
 
 Clear, with a low around 62.
Sunday
 
 Sunny, with a high near 81.
Sunday Night
 
 Mostly clear, with a low around 64.
Monday
 
 Sunny, with a high near 84. Breezy.
Monday Night
 
 Mostly clear, with a low around 64.
Tuesday
 
 Partly sunny, with a high near 80.

 

Forecast from NOAA-NWS for Harrisburg SD.