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

Overnight: A chance of showers and thunderstorms before 3am, then showers likely and possibly a thunderstorm between 3am and 4am, then a chance of showers after 4am. Mostly cloudy, with a low around 67. Calm wind becoming south southwest around 5 mph. Chance of precipitation is 70%. 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 around 5 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 67. Calm wind becoming south southeast around 5 mph after midnight. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Partly Cloudy
then Showers
Likely
 Wednesday

Wednesday: Showers and thunderstorms likely before 8am, then showers likely and possibly a thunderstorm between 8am and 10am, then a chance of showers and thunderstorms after 10am. Partly sunny, with a high near 87. Southwest wind 5 to 10 mph becoming south southeast in the morning. Chance of precipitation is 70%.
Showers
Likely then
Chance
Showers
 Wednesday
Night
Wednesday Night: Partly cloudy, with a low around 66. West wind around 5 mph becoming calm in the evening.
Partly Cloudy

 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. Light east wind becoming southeast 5 to 10 mph in the morning. Winds could gust 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 90.
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 67 °F Hi 90 °F Lo 67 °F Hi 87 °F Lo 66 °F Hi 91 °F Lo 69 °F Hi 90 °F Lo 70 °F

Hazardous Weather Outlook
Severe Thunderstorm Watch
 

Overnight
 
 A chance of showers and thunderstorms before 3am, then showers likely and possibly a thunderstorm between 3am and 4am, then a chance of showers after 4am. Mostly cloudy, with a low around 67. Calm wind becoming south southwest around 5 mph. Chance of precipitation is 70%. 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 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 67. Calm wind becoming south southeast around 5 mph after midnight. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday
 
 Showers and thunderstorms likely before 8am, then showers likely and possibly a thunderstorm between 8am and 10am, then a chance of showers and thunderstorms after 10am. Partly sunny, with a high near 87. Southwest wind 5 to 10 mph becoming south southeast in the morning. Chance of precipitation is 70%.
Wednesday Night
 
 Partly cloudy, with a low around 66. West wind around 5 mph becoming calm 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. Light east wind becoming southeast 5 to 10 mph in the morning. Winds could gust 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 90.
Friday Night
 
 Showers likely and possibly a thunderstorm. Partly cloudy, with a low around 70. Chance of precipitation is 60%.
Independence Day
 
 A 30 percent chance of showers and thunderstorms after 1pm. 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
 
 Partly sunny, with a high near 85.
Sunday Night
 
 Partly cloudy, with a low around 65.
Monday
 
 Mostly sunny, with a high near 86.

 

Forecast from NOAA-NWS for Sioux Falls SD.