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

Prolonged Extreme Cold; Eastern U.S. Winter Storm

Another Arctic blast will surge south across the northern Plains tonight, crossing the Midwest and reaching the Gulf Coast Friday night. Dangerously cold temperatures will persist across the eastern U.S. into early February. There is increasing confidence for significant heavy snow across much of the Southern Appalachians, Carolinas, and southern Mid-Atlantic Friday into Sunday. Read More >

Current conditions at

Sisseton, Sisseton Municipal Airport (K8D3)

Lat: 45.67°NLon: 96.99°WElev: 1161ft.

8°F

-13°C

Humidity 66%
Wind Speed Calm
Barometer 30.37 in (1033.5 mb)
Dewpoint -1°F (-18°C)
Visibility NA
Last update 29 Jan 10:56 am CST
Extended Forecast for

Grenville SD

  • Today

    Today: Sunny, with a high near 11. Calm wind becoming north northwest around 6 mph in the afternoon.

    High: 11 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around -9. Wind chill values as low as -24. North northeast wind 6 to 10 mph.

    Low: -9 °F

    Partly Cloudy

  • Friday

    Friday: Sunny and cold, with a high near 2. Wind chill values as low as -25. North northeast wind 5 to 9 mph.

    High: 2 °F

    Cold

  • Friday Night

    Friday Night: Mostly clear, with a low around -8. Wind chill values as low as -23. Light and variable wind becoming south 6 to 11 mph in the evening.

    Low: -8 °F

    Mostly Clear

  • Saturday

    Saturday: A chance of snow after noon. Patchy blowing snow after noon. Mostly sunny, with a high near 22. Breezy, with a south wind 13 to 22 mph, with gusts as high as 34 mph. Chance of precipitation is 40%.

    High: 22 °F

    Mostly Sunny
    then Chance
    Snow and
    Patchy
    Blowing Snow

  • Saturday Night

    Saturday Night: Snow. Patchy blowing snow before 10pm. Low around 16. Breezy, with a south wind 17 to 21 mph becoming west after midnight. Winds could gust as high as 33 mph. Chance of precipitation is 80%. New snow accumulation of around an inch possible.

    Low: 16 °F

    Snow and
    Patchy
    Blowing Snow

  • Sunday

    Sunday: A chance of snow before noon. Patchy blowing snow between noon and 5pm. Mostly cloudy, with a high near 32. Northwest wind 15 to 18 mph, with gusts as high as 29 mph. Chance of precipitation is 30%.

    High: 32 °F

    Chance Snow
    then Patchy
    Blowing Snow

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 8. North northwest wind 7 to 14 mph, with gusts as high as 24 mph.

    Low: 8 °F

    Mostly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 21. North wind around 8 mph becoming east southeast in the afternoon.

    High: 21 °F

    Partly Sunny

Detailed Forecast

Today
Sunny, with a high near 11. Calm wind becoming north northwest around 6 mph in the afternoon.
Tonight
Partly cloudy, with a low around -9. Wind chill values as low as -24. North northeast wind 6 to 10 mph.
Friday
Sunny and cold, with a high near 2. Wind chill values as low as -25. North northeast wind 5 to 9 mph.
Friday Night
Mostly clear, with a low around -8. Wind chill values as low as -23. Light and variable wind becoming south 6 to 11 mph in the evening.
Saturday
A chance of snow after noon. Patchy blowing snow after noon. Mostly sunny, with a high near 22. Breezy, with a south wind 13 to 22 mph, with gusts as high as 34 mph. Chance of precipitation is 40%.
Saturday Night
Snow. Patchy blowing snow before 10pm. Low around 16. Breezy, with a south wind 17 to 21 mph becoming west after midnight. Winds could gust as high as 33 mph. Chance of precipitation is 80%. New snow accumulation of around an inch possible.
Sunday
A chance of snow before noon. Patchy blowing snow between noon and 5pm. Mostly cloudy, with a high near 32. Northwest wind 15 to 18 mph, with gusts as high as 29 mph. Chance of precipitation is 30%.
Sunday Night
Mostly cloudy, with a low around 8. North northwest wind 7 to 14 mph, with gusts as high as 24 mph.
Monday
Partly sunny, with a high near 21. North wind around 8 mph becoming east southeast in the afternoon.
Monday Night
A slight chance of snow after midnight. Mostly cloudy, with a low around 9. Chance of precipitation is 20%.
Tuesday
A slight chance of snow. Mostly cloudy, with a high near 21. Chance of precipitation is 20%.
Tuesday Night
A slight chance of snow. Mostly cloudy, with a low around 11. Chance of precipitation is 20%.
Wednesday
A slight chance of snow. Partly sunny, with a high near 25. 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 97.37°W (Elev. 1795 ft)
Last Update:
10:57 am CST Jan 29, 2026
Forecast Valid:
11am CST Jan 29, 2026-6pm CST Feb 4, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation