National Weather Service Forecast for: Harrisburg SD
Issued by: National Weather Service Sioux Falls, SD
Updated: 12:11 am CDT Aug 13, 2025
 
Overnight

Overnight: Mostly clear, with a low around 57. Calm wind.
Mostly Clear

 Wednesday

Wednesday: Sunny, with a high near 82. South southeast wind 5 to 15 mph, with gusts as high as 20 mph.
Sunny

 Wednesday
Night
Wednesday Night: A 40 percent chance of showers and thunderstorms after 1am. Increasing clouds, with a low around 65. South southeast wind 10 to 15 mph, with gusts as high as 20 mph.
Partly Cloudy
then Chance
T-storms
 Thursday

Thursday: A 20 percent chance of showers and thunderstorms before 1pm. Mostly cloudy, then gradually becoming sunny, with a high near 84. Breezy, with a south wind 10 to 20 mph, with gusts as high as 30 mph.
Slight Chance
T-storms and
Breezy
 Thursday
Night
Thursday Night: A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 70. South southeast wind 10 to 15 mph, with gusts as high as 20 mph.
Mostly Clear
then Slight
Chance
T-storms
 Friday

Friday: Mostly sunny, with a high near 88. South wind around 10 mph.
Mostly Sunny

 Friday
Night
Friday Night: Mostly cloudy, with a low around 72.
Mostly Cloudy

 Saturday

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

 Saturday
Night
Saturday Night: A 30 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 70.
Partly Cloudy
then Chance
T-storms
Lo 57 °F Hi 82 °F Lo 65 °F Hi 84 °F Lo 70 °F Hi 88 °F Lo 72 °F Hi 91 °F Lo 70 °F

 

Overnight
 
 Mostly clear, with a low around 57. Calm wind.
Wednesday
 
 Sunny, with a high near 82. South southeast wind 5 to 15 mph, with gusts as high as 20 mph.
Wednesday Night
 
 A 40 percent chance of showers and thunderstorms after 1am. Increasing clouds, with a low around 65. South southeast wind 10 to 15 mph, with gusts as high as 20 mph.
Thursday
 
 A 20 percent chance of showers and thunderstorms before 1pm. Mostly cloudy, then gradually becoming sunny, with a high near 84. Breezy, with a south wind 10 to 20 mph, with gusts as high as 30 mph.
Thursday Night
 
 A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 70. South southeast wind 10 to 15 mph, with gusts as high as 20 mph.
Friday
 
 Mostly sunny, with a high near 88. South wind around 10 mph.
Friday Night
 
 Mostly cloudy, with a low around 72.
Saturday
 
 Mostly sunny, with a high near 91.
Saturday Night
 
 A 30 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 70.
Sunday
 
 Mostly sunny, with a high near 88.
Sunday Night
 
 A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 68.
Monday
 
 Mostly sunny, with a high near 85.
Monday Night
 
 Partly cloudy, with a low around 66.
Tuesday
 
 Mostly sunny, with a high near 82.

 

Forecast from NOAA-NWS for Harrisburg SD.