National Weather Service Forecast for: Sisseton SD
Issued by: National Weather Service Aberdeen, SD
Updated: 9:36 pm CDT Jun 18, 2026
 
Tonight

Tonight: A slight chance of showers and thunderstorms between 4am and 5am, then showers likely and possibly a thunderstorm after 5am. Increasing clouds, with a low around 51. Calm wind becoming south southwest 5 to 7 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.
Mostly Clear
then Showers
Likely

 Juneteenth

Juneteenth: A chance of showers and thunderstorms, mainly between 1pm and 4pm. Cloudy through mid morning, then gradual clearing, with a high near 74. Breezy, with a southwest wind 10 to 15 mph becoming northwest 16 to 21 mph in the afternoon. Winds could gust as high as 31 mph. Chance of precipitation is 50%.
Chance
Showers then
Chance
T-storms and
Breezy
 Friday
Night
Friday Night: Mostly clear, with a low around 50. West northwest wind 12 to 17 mph decreasing to 6 to 11 mph after midnight. Winds could gust as high as 26 mph.
Mostly Clear


 Saturday

Saturday: Sunny, with a high near 75. Light and variable wind becoming northeast around 6 mph in the morning.
Sunny


 Saturday
Night
Saturday Night: Mostly cloudy, with a low around 52. East northeast wind 6 to 8 mph.
Mostly Cloudy


 Sunday

Sunday: A slight chance of showers after 1pm. Partly sunny, with a high near 72. East northeast wind 8 to 11 mph. Chance of precipitation is 20%.
Partly Sunny
then Slight
Chance
Showers
 Sunday
Night
Sunday Night: A slight chance of showers before 1am. Mostly cloudy, with a low around 52. East northeast wind 5 to 10 mph becoming light and variable after midnight. Chance of precipitation is 20%.
Slight Chance
Showers

 Monday

Monday: Partly sunny, with a high near 74. North wind 5 to 7 mph becoming southeast in the afternoon.
Partly Sunny


 Monday
Night
Monday Night: A slight chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 54. Southeast wind 6 to 8 mph becoming southwest after midnight. Chance of precipitation is 60%.
Slight Chance
T-storms then
Showers
Likely
Lo 51 °F Hi 74 °F Lo 50 °F Hi 75 °F Lo 52 °F Hi 72 °F Lo 52 °F Hi 74 °F Lo 54 °F

Hazardous Weather Outlook
 

Tonight
 
 A slight chance of showers and thunderstorms between 4am and 5am, then showers likely and possibly a thunderstorm after 5am. Increasing clouds, with a low around 51. Calm wind becoming south southwest 5 to 7 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.
Juneteenth
 
 A chance of showers and thunderstorms, mainly between 1pm and 4pm. Cloudy through mid morning, then gradual clearing, with a high near 74. Breezy, with a southwest wind 10 to 15 mph becoming northwest 16 to 21 mph in the afternoon. Winds could gust as high as 31 mph. Chance of precipitation is 50%.
Friday Night
 
 Mostly clear, with a low around 50. West northwest wind 12 to 17 mph decreasing to 6 to 11 mph after midnight. Winds could gust as high as 26 mph.
Saturday
 
 Sunny, with a high near 75. Light and variable wind becoming northeast around 6 mph in the morning.
Saturday Night
 
 Mostly cloudy, with a low around 52. East northeast wind 6 to 8 mph.
Sunday
 
 A slight chance of showers after 1pm. Partly sunny, with a high near 72. East northeast wind 8 to 11 mph. Chance of precipitation is 20%.
Sunday Night
 
 A slight chance of showers before 1am. Mostly cloudy, with a low around 52. East northeast wind 5 to 10 mph becoming light and variable after midnight. Chance of precipitation is 20%.
Monday
 
 Partly sunny, with a high near 74. North wind 5 to 7 mph becoming southeast in the afternoon.
Monday Night
 
 A slight chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 54. Southeast wind 6 to 8 mph becoming southwest after midnight. Chance of precipitation is 60%.
Tuesday
 
 A chance of showers and thunderstorms. Partly sunny, with a high near 73. Chance of precipitation is 50%.
Tuesday Night
 
 A slight chance of showers and thunderstorms. Partly cloudy, with a low around 53. Chance of precipitation is 20%.
Wednesday
 
 A slight chance of showers. Mostly sunny, with a high near 75. Chance of precipitation is 20%.
Wednesday Night
 
 A slight chance of showers and thunderstorms. Partly cloudy, with a low around 53. Chance of precipitation is 20%.
Thursday
 
 A slight chance of showers and thunderstorms. Mostly sunny, with a high near 77. Chance of precipitation is 20%.

 

Forecast from NOAA-NWS for Sisseton SD.