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.

38°F

3°C

Humidity 79%
Wind Speed E 13 mph
Barometer 29.79 in (1009.5 mb)
Dewpoint 32°F (0°C)
Visibility NA
Wind Chill30°F (-1°C)
Last update 25 Mar 2:56 am CDT
Extended Forecast for

Grenville SD

  • Overnight

    Overnight: Mostly cloudy, with a low around 38. South wind around 9 mph.

    Low: 38 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 66. South southwest wind 6 to 11 mph becoming northwest in the morning.

    High: 66 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A chance of sprinkles before 11pm, then a chance of rain, mainly between 11pm and 4am. Increasing clouds, with a low around 30. South southwest wind 7 to 12 mph becoming north 13 to 18 mph after midnight. Winds could gust as high as 30 mph. Chance of precipitation is 30%.

    Low: 30 °F

    Chance Rain

  • Thursday

    Thursday: A chance of rain and snow showers before 1pm, then a chance of flurries between 1pm and 2pm. Mostly cloudy, with a high near 37. Breezy, with a north wind 20 to 22 mph, with gusts as high as 32 mph. Chance of precipitation is 20%.

    High: 37 °F

    Breezy.
    Chance
    Sprinkles/Flurries
    then Slight
    Chance Snow

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 16. North wind 8 to 16 mph, with gusts as high as 25 mph.

    Low: 16 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 37. West northwest wind 7 to 13 mph, with gusts as high as 21 mph.

    High: 37 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 27. West northwest wind 9 to 14 mph becoming south southwest after midnight. Winds could gust as high as 23 mph.

    Low: 27 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 55. South wind 14 to 16 mph, with gusts as high as 25 mph.

    High: 55 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 36. East southeast wind around 11 mph, with gusts as high as 20 mph.

    Low: 36 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 38. South wind around 9 mph.
Wednesday
Mostly sunny, with a high near 66. South southwest wind 6 to 11 mph becoming northwest in the morning.
Wednesday Night
A chance of sprinkles before 11pm, then a chance of rain, mainly between 11pm and 4am. Increasing clouds, with a low around 30. South southwest wind 7 to 12 mph becoming north 13 to 18 mph after midnight. Winds could gust as high as 30 mph. Chance of precipitation is 30%.
Thursday
A chance of rain and snow showers before 1pm, then a chance of flurries between 1pm and 2pm. Mostly cloudy, with a high near 37. Breezy, with a north wind 20 to 22 mph, with gusts as high as 32 mph. Chance of precipitation is 20%.
Thursday Night
Partly cloudy, with a low around 16. North wind 8 to 16 mph, with gusts as high as 25 mph.
Friday
Sunny, with a high near 37. West northwest wind 7 to 13 mph, with gusts as high as 21 mph.
Friday Night
Mostly clear, with a low around 27. West northwest wind 9 to 14 mph becoming south southwest after midnight. Winds could gust as high as 23 mph.
Saturday
Mostly sunny, with a high near 55. South wind 14 to 16 mph, with gusts as high as 25 mph.
Saturday Night
Partly cloudy, with a low around 36. East southeast wind around 11 mph, with gusts as high as 20 mph.
Sunday
Mostly sunny, with a high near 67.
Sunday Night
Partly cloudy, with a low around 38.
Monday
Partly sunny, with a high near 64.
Monday Night
Mostly cloudy, with a low around 41.
Tuesday
A slight chance of rain. Mostly cloudy, with a high near 64. Breezy. Chance of precipitation is 20%.
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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:
3:36 am CDT Mar 25, 2026
Forecast Valid:
3am CDT Mar 25, 2026-6pm CDT Mar 31, 2026
 
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Additional Resources

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High Temperature

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Chance of Precipitation