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.

33°F

1°C

Humidity 49%
Wind Speed E 5 mph
Barometer 30.27 in (1027.0 mb)
Dewpoint 16°F (-9°C)
Visibility NA
Wind Chill28°F (-2°C)
Last update 19 Apr 9:56 pm CDT
Extended Forecast for

Grenville SD

  • Tonight

    Tonight: Mostly clear, with a low around 28. South southeast wind 7 to 11 mph, with gusts as high as 21 mph.

    Low: 28 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 64. Breezy, with a south wind 15 to 25 mph, with gusts as high as 36 mph.

    High: 64 °F

    Mostly Sunny
    and Breezy

  • Monday Night

    Monday Night: Partly cloudy, with a low around 40. Southwest wind 6 to 15 mph becoming north northeast after midnight.

    Low: 40 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 69. Northeast wind around 8 mph becoming east southeast in the afternoon.

    High: 69 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 50. Southeast wind 10 to 14 mph, with gusts as high as 24 mph.

    Low: 50 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 83. Breezy, with a south southeast wind 14 to 23 mph, with gusts as high as 36 mph.

    High: 83 °F

    Mostly Sunny
    and Breezy

  • Wednesday Night

    Wednesday Night: A slight chance of showers, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 57. Breezy, with a south wind 23 to 25 mph, with gusts as high as 38 mph. Chance of precipitation is 50%.

    Low: 57 °F

    Breezy.
    Slight Chance
    Showers then
    Chance
    Showers

  • Thursday

    Thursday: A chance of showers. Mostly sunny, with a high near 69. Breezy, with a south southwest wind 22 to 29 mph, with gusts as high as 43 mph. Chance of precipitation is 40%.

    High: 69 °F

    Chance
    Showers and
    Breezy

  • Thursday Night

    Thursday Night: A chance of rain showers before 1am, then a slight chance of rain and snow showers between 1am and 4am, then a slight chance of snow showers after 4am. Mostly cloudy, with a low around 34. Breezy, with a west wind 24 to 28 mph, with gusts as high as 41 mph. Chance of precipitation is 30%.

    Low: 34 °F

    Breezy.
    Chance
    Showers then
    Chance
    Rain/Snow

Detailed Forecast

Tonight
Mostly clear, with a low around 28. South southeast wind 7 to 11 mph, with gusts as high as 21 mph.
Monday
Mostly sunny, with a high near 64. Breezy, with a south wind 15 to 25 mph, with gusts as high as 36 mph.
Monday Night
Partly cloudy, with a low around 40. Southwest wind 6 to 15 mph becoming north northeast after midnight.
Tuesday
Sunny, with a high near 69. Northeast wind around 8 mph becoming east southeast in the afternoon.
Tuesday Night
Mostly clear, with a low around 50. Southeast wind 10 to 14 mph, with gusts as high as 24 mph.
Wednesday
Mostly sunny, with a high near 83. Breezy, with a south southeast wind 14 to 23 mph, with gusts as high as 36 mph.
Wednesday Night
A slight chance of showers, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 57. Breezy, with a south wind 23 to 25 mph, with gusts as high as 38 mph. Chance of precipitation is 50%.
Thursday
A chance of showers. Mostly sunny, with a high near 69. Breezy, with a south southwest wind 22 to 29 mph, with gusts as high as 43 mph. Chance of precipitation is 40%.
Thursday Night
A chance of rain showers before 1am, then a slight chance of rain and snow showers between 1am and 4am, then a slight chance of snow showers after 4am. Mostly cloudy, with a low around 34. Breezy, with a west wind 24 to 28 mph, with gusts as high as 41 mph. Chance of precipitation is 30%.
Friday
Partly sunny, with a high near 49. Breezy.
Friday Night
Partly cloudy, with a low around 29. Blustery.
Saturday
Mostly sunny, with a high near 47.
Saturday Night
Mostly cloudy, with a low around 29.
Sunday
Partly sunny, with a high near 51.
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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:
9:36 pm CDT Apr 19, 2026
Forecast Valid:
10pm CDT Apr 19, 2026-6pm CDT Apr 26, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation