National Weather Service Forecast for: Flandreau SD
Issued by: National Weather Service Sioux Falls, SD
Updated: 3:03 pm CDT Jul 28, 2026
 
Tonight

Tonight: A chance of rain and thunderstorms before 11pm, then a chance of rain between 11pm and midnight. Patchy smoke. Partly cloudy, with a low around 67. South southeast wind around 5 mph becoming west southwest in the evening. Chance of precipitation is 20%.
Chance
Showers then
Patchy Smoke
 Wednesday

Wednesday: A chance of sprinkles after 4pm. Patchy smoke. Sunny, with a high near 90. South southwest wind 5 to 10 mph.
Chance
Sprinkles

 Wednesday
Night
Wednesday Night: Patchy smoke. Increasing clouds, with a low around 69. South wind around 10 mph.
Patchy Smoke

 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 wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 70%.
Chance
Showers then
Showers
Likely
 Thursday
Night
Thursday Night: Showers and possibly a thunderstorm. Low around 64. South southeast wind 5 to 15 mph becoming north northwest after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 90%.
Showers

 Friday

Friday: A slight chance of showers and thunderstorms before 7am, then a slight chance of showers between 7am and 1pm, then a slight chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 80. Breezy, with a north wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 20%.
Slight Chance
T-storms and
Breezy
 Friday
Night
Friday Night: Mostly clear, with a low around 59.
Mostly Clear

 Saturday

Saturday: Sunny, with a high near 79.
Sunny

 Saturday
Night
Saturday Night: Clear, with a low around 60.
Clear
Lo 67 °F Hi 90 °F Lo 69 °F Hi 83 °F Lo 64 °F Hi 80 °F Lo 59 °F Hi 79 °F Lo 60 °F

Hazardous Weather Outlook
 

Tonight
 
 A chance of rain and thunderstorms before 11pm, then a chance of rain between 11pm and midnight. Patchy smoke. Partly cloudy, with a low around 67. South southeast wind around 5 mph becoming west southwest in the evening. Chance of precipitation is 20%.
Wednesday
 
 A chance of sprinkles after 4pm. Patchy smoke. Sunny, with a high near 90. South southwest wind 5 to 10 mph.
Wednesday Night
 
 Patchy smoke. Increasing clouds, with a low around 69. South 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 wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 70%.
Thursday Night
 
 Showers and possibly a thunderstorm. Low around 64. South southeast wind 5 to 15 mph becoming north northwest after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 90%.
Friday
 
 A slight chance of showers and thunderstorms before 7am, then a slight chance of showers between 7am and 1pm, then a slight chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 80. 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 59.
Saturday
 
 Sunny, with a high near 79.
Saturday Night
 
 Clear, with a low around 60.
Sunday
 
 Sunny, with a high near 81.
Sunday Night
 
 Mostly clear, with a low around 63.
Monday
 
 Sunny, with a high near 83. Breezy.
Monday Night
 
 Mostly clear, with a low around 62. Breezy.
Tuesday
 
 A 30 percent chance of showers. Partly sunny, with a high near 78.

 

Forecast from NOAA-NWS for Flandreau SD.