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 Thursday night, crossing the Midwest and reaching the Gulf Coast Friday night. Confidence continues to increase 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.

-7°F

-22°C

Humidity 82%
Wind Speed Calm
Barometer 30.34 in (1032.6 mb)
Dewpoint -11°F (-24°C)
Visibility NA
Last update 29 Jan 1:56 am CST
Extended Forecast for

Grenville SD

  • Overnight

    Overnight: Mostly cloudy, with a steady temperature around -3. Calm wind.

    Low: -3 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny and cold, with a high near 10. Calm wind becoming north around 6 mph in the afternoon.

    High: 10 °F

    Cold

  • Thursday Night

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

    High: 2 °F

    Cold

  • Friday Night

    Friday Night: Mostly clear, with a low around -8. North wind 5 to 11 mph becoming south after midnight.

    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%.

    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 23 mph.

    Low: 8 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a steady temperature around -3. Calm wind.
Thursday
Mostly sunny and cold, with a high near 10. Calm wind becoming north around 6 mph in the afternoon.
Thursday Night
Partly cloudy, with a low around -9. Wind chill values as low as -24. North northeast wind 6 to 9 mph.
Friday
Sunny and cold, with a high near 2. Wind chill values as low as -25. North northeast wind 6 to 9 mph.
Friday Night
Mostly clear, with a low around -8. North wind 5 to 11 mph becoming south after midnight.
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%.
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 23 mph.
Monday
Partly sunny, with a high near 21.
Monday Night
A slight chance of snow. 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 97.4°W (Elev. 1821 ft)
Last Update:
1:57 am CST Jan 29, 2026
Forecast Valid:
2am 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