National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Sisseton, Sisseton Municipal Airport (K8D3)

Lat: 45.67°NLon: 96.99°WElev: 1161ft.

Breezy

50°F

10°C

Humidity 80%
Wind Speed N 24 mph
Barometer 29.72 in (1006.3 mb)
Dewpoint 44°F (7°C)
Visibility NA
Wind Chill43°F (6°C)
Last update 21 Mar 5:56 pm CDT
Extended Forecast for

Grenville SD

  • Tonight

    Tonight: A chance of rain and snow before 4am, then a slight chance of snow between 4am and 5am, then a chance of flurries after 5am. Increasing clouds, with a low around 29. Blustery, with a north northeast wind 11 to 16 mph increasing to 18 to 23 mph in the evening. Winds could gust as high as 34 mph. Chance of precipitation is 30%.

    Low: 29 °F

    Blustery.
    Mostly Cloudy
    then Chance
    Rain/Snow

  • Sunday

    Sunday: Cloudy through mid morning, then gradual clearing, with a high near 40. North wind 10 to 16 mph, with gusts as high as 24 mph.

    High: 40 °F

    Gradual
    Clearing

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 26. Northwest wind 6 to 9 mph becoming south southeast after midnight.

    Low: 26 °F

    Partly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 51. Southeast wind 6 to 15 mph, with gusts as high as 23 mph.

    High: 51 °F

    Partly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 33. South wind 11 to 13 mph.

    Low: 33 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 52. East northeast wind 10 to 15 mph, with gusts as high as 23 mph.

    High: 52 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 34. East wind 11 to 14 mph, with gusts as high as 22 mph.

    Low: 34 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 61. East wind 10 to 16 mph becoming west in the afternoon. Winds could gust as high as 24 mph.

    High: 61 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: A slight chance of rain after 1am. Mostly cloudy, with a low around 30. West wind around 14 mph becoming north after midnight. Winds could gust as high as 23 mph. Chance of precipitation is 20%.

    Low: 30 °F

    Mostly Cloudy
    then Slight
    Chance Rain

Detailed Forecast

Tonight
A chance of rain and snow before 4am, then a slight chance of snow between 4am and 5am, then a chance of flurries after 5am. Increasing clouds, with a low around 29. Blustery, with a north northeast wind 11 to 16 mph increasing to 18 to 23 mph in the evening. Winds could gust as high as 34 mph. Chance of precipitation is 30%.
Sunday
Cloudy through mid morning, then gradual clearing, with a high near 40. North wind 10 to 16 mph, with gusts as high as 24 mph.
Sunday Night
Partly cloudy, with a low around 26. Northwest wind 6 to 9 mph becoming south southeast after midnight.
Monday
Partly sunny, with a high near 51. Southeast wind 6 to 15 mph, with gusts as high as 23 mph.
Monday Night
Mostly cloudy, with a low around 33. South wind 11 to 13 mph.
Tuesday
Mostly cloudy, with a high near 52. East northeast wind 10 to 15 mph, with gusts as high as 23 mph.
Tuesday Night
Mostly cloudy, with a low around 34. East wind 11 to 14 mph, with gusts as high as 22 mph.
Wednesday
Partly sunny, with a high near 61. East wind 10 to 16 mph becoming west in the afternoon. Winds could gust as high as 24 mph.
Wednesday Night
A slight chance of rain after 1am. Mostly cloudy, with a low around 30. West wind around 14 mph becoming north after midnight. Winds could gust as high as 23 mph. Chance of precipitation is 20%.
Thursday
Partly sunny, with a high near 40. Breezy.
Thursday Night
Mostly cloudy, with a low around 20.
Friday
Partly sunny, with a high near 41.
Friday Night
Partly cloudy, with a low around 23.
Saturday
Mostly sunny, with a high near 47.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Grenville SD
 45.46°N 97.4°W (Elev. 1821 ft)
Last Update:
5:36 pm CDT Mar 21, 2026
Forecast Valid:
6pm CDT Mar 21, 2026-6pm CDT Mar 28, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation