National Weather Service Forecast for: Harrisburg 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. East southeast wind around 5 mph becoming southwest. 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, with a high near 90. West southwest wind 5 to 10 mph.
Sunny

 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 68. Calm wind becoming south around 5 mph after midnight. 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: Showers and thunderstorms likely, mainly before 1pm. Partly sunny, with a high near 88. South southwest wind around 10 mph. Chance of precipitation is 60%.
Showers
Likely
 Wednesday
Night
Wednesday Night: A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 66. West wind 5 to 10 mph becoming light and variable in the evening.
Slight Chance
T-storms
 Thursday

Thursday: A chance of showers between 1pm and 4pm, then a chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 91. South southeast wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.
Partly Sunny
then Chance
T-storms
 Thursday
Night
Thursday Night: Showers and possibly a thunderstorm before 1am, then a chance of showers. Low around 69. Chance of precipitation is 80%.
Showers

 Friday

Friday: Mostly sunny, with a high near 91.
Mostly Sunny

 Friday
Night
Friday Night: Showers likely and possibly a thunderstorm. Partly cloudy, with a low around 70. Chance of precipitation is 60%.
Showers
Likely
Lo 68 °F Hi 90 °F Lo 68 °F Hi 88 °F Lo 66 °F Hi 91 °F Lo 69 °F Hi 91 °F Lo 70 °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. East southeast wind around 5 mph becoming southwest. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tuesday
 
 Sunny, with a high near 90. West southwest wind 5 to 10 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 68. Calm wind becoming south around 5 mph after midnight. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday
 
 Showers and thunderstorms likely, mainly before 1pm. Partly sunny, with a high near 88. South southwest wind around 10 mph. Chance of precipitation is 60%.
Wednesday Night
 
 A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 66. West wind 5 to 10 mph becoming light and variable in the evening.
Thursday
 
 A chance of showers between 1pm and 4pm, then a chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 91. South southeast wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.
Thursday Night
 
 Showers and possibly a thunderstorm before 1am, then a chance of showers. Low around 69. Chance of precipitation is 80%.
Friday
 
 Mostly sunny, with a high near 91.
Friday Night
 
 Showers likely and possibly a thunderstorm. Partly cloudy, with a low around 70. Chance of precipitation is 60%.
Independence Day
 
 Partly sunny, with a high near 89.
Saturday Night
 
 Showers likely and possibly a thunderstorm. Partly cloudy, with a low around 66. Chance of precipitation is 60%.
Sunday
 
 Mostly sunny, with a high near 86.
Sunday Night
 
 Partly cloudy, with a low around 65.
Monday
 
 Mostly sunny, with a high near 87.

 

Forecast from NOAA-NWS for Harrisburg SD.