National Weather Service Forecast for: Sisseton SD
Issued by: National Weather Service Aberdeen, SD
Updated: 2:36 am CDT Aug 20, 2026
 
Overnight

Overnight: A slight chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 63. Southwest wind 6 to 8 mph. Chance of precipitation is 20%.
Slight Chance
T-storms
 Thursday

Thursday: A slight chance of showers and thunderstorms before 8am, then a chance of rain between 8am and 10am. Mostly cloudy, then gradually becoming sunny, with a high near 84. South southwest wind 10 to 18 mph becoming northwest in the afternoon. Winds could gust as high as 28 mph. Chance of precipitation is 20%.
Chance
Showers then
Sunny
 Thursday
Night
Thursday Night: Mostly clear, with a low around 59. Northwest wind 6 to 13 mph, with gusts as high as 21 mph.
Mostly Clear

 Friday

Friday: Increasing clouds, with a high near 82. North northwest wind 6 to 10 mph.
Increasing
Clouds
 Friday
Night
Friday Night: Partly cloudy, with a low around 59. North northwest wind 7 to 9 mph.
Partly Cloudy

 Saturday

Saturday: Sunny, with a high near 79. North wind 6 to 10 mph.
Sunny

 Saturday
Night
Saturday Night: Partly cloudy, with a low around 56. North northeast wind 5 to 7 mph becoming light and variable in the evening.
Partly Cloudy

 Sunday

Sunday: Mostly sunny, with a high near 79. Southeast wind 5 to 11 mph, with gusts as high as 20 mph.
Mostly Sunny

 Sunday
Night
Sunday Night: A chance of showers after 1am. Mostly cloudy, with a low around 60. South southeast wind around 11 mph. Chance of precipitation is 30%.
Partly Cloudy
then Chance
Showers
Lo 63 °F Hi 84 °F Lo 59 °F Hi 82 °F Lo 59 °F Hi 79 °F Lo 56 °F Hi 79 °F Lo 60 °F

 

Overnight
 
 A slight chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 63. Southwest wind 6 to 8 mph. Chance of precipitation is 20%.
Thursday
 
 A slight chance of showers and thunderstorms before 8am, then a chance of rain between 8am and 10am. Mostly cloudy, then gradually becoming sunny, with a high near 84. South southwest wind 10 to 18 mph becoming northwest in the afternoon. Winds could gust as high as 28 mph. Chance of precipitation is 20%.
Thursday Night
 
 Mostly clear, with a low around 59. Northwest wind 6 to 13 mph, with gusts as high as 21 mph.
Friday
 
 Increasing clouds, with a high near 82. North northwest wind 6 to 10 mph.
Friday Night
 
 Partly cloudy, with a low around 59. North northwest wind 7 to 9 mph.
Saturday
 
 Sunny, with a high near 79. North wind 6 to 10 mph.
Saturday Night
 
 Partly cloudy, with a low around 56. North northeast wind 5 to 7 mph becoming light and variable in the evening.
Sunday
 
 Mostly sunny, with a high near 79. Southeast wind 5 to 11 mph, with gusts as high as 20 mph.
Sunday Night
 
 A chance of showers after 1am. Mostly cloudy, with a low around 60. South southeast wind around 11 mph. Chance of precipitation is 30%.
Monday
 
 A slight chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 82. Chance of precipitation is 20%.
Monday Night
 
 A slight chance of showers and thunderstorms. Partly cloudy, with a low around 63. Chance of precipitation is 20%.
Tuesday
 
 Mostly sunny, with a high near 83.
Tuesday Night
 
 Mostly clear, with a low around 61.
Wednesday
 
 Mostly sunny, with a high near 81.

 

Forecast from NOAA-NWS for Sisseton SD.