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.

-4°F

-20°C

Humidity 86%
Wind Speed NW 5 mph
Barometer 30.34 in (1032.8 mb)
Dewpoint -7°F (-22°C)
Visibility NA
Wind Chill-15°F (-26°C)
Last update 28 Jan 8:56 pm CST
Extended Forecast for

Grenville SD

  • Tonight

    Tonight: Mostly cloudy, with a low around -5. Calm wind.

    Low: -5 °F

    Mostly Cloudy

  • Thursday

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

    High: 10 °F

    Cold

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around -10. Wind chill values as low as -24. North northeast wind 7 to 9 mph.

    Low: -10 °F

    Partly Cloudy

  • Friday

    Friday: Sunny and cold, with a high near 2. Wind chill values as low as -27. North northeast wind 6 to 10 mph.

    High: 2 °F

    Cold

  • Friday Night

    Friday Night: Mostly clear, with a low around -8. North wind 6 to 9 mph becoming south after midnight.

    Low: -8 °F

    Mostly Clear

  • Saturday

    Saturday: A chance of snow after noon. Patchy blowing snow between 1pm and 5pm. Mostly sunny, with a high near 19. Breezy, with a south wind 10 to 20 mph, with gusts as high as 31 mph. Chance of precipitation is 30%.

    High: 19 °F

    Sunny then
    Chance Snow
    and Patchy
    Blowing Snow

  • Saturday Night

    Saturday Night: Snow likely. Mostly cloudy, with a low around 12. South southwest wind 14 to 18 mph, with gusts as high as 31 mph. Chance of precipitation is 70%.

    Low: 12 °F

    Snow Likely

  • Sunday

    Sunday: A slight chance of snow before noon. Mostly cloudy, with a high near 28. West northwest wind 14 to 16 mph, with gusts as high as 26 mph. Chance of precipitation is 20%.

    High: 28 °F

    Slight Chance
    Snow then
    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 13. West northwest wind 7 to 13 mph, with gusts as high as 21 mph.

    Low: 13 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around -5. Calm wind.
Thursday
Mostly sunny and cold, with a high near 10. Calm wind becoming northwest around 6 mph in the morning.
Thursday Night
Partly cloudy, with a low around -10. Wind chill values as low as -24. North northeast wind 7 to 9 mph.
Friday
Sunny and cold, with a high near 2. Wind chill values as low as -27. North northeast wind 6 to 10 mph.
Friday Night
Mostly clear, with a low around -8. North wind 6 to 9 mph becoming south after midnight.
Saturday
A chance of snow after noon. Patchy blowing snow between 1pm and 5pm. Mostly sunny, with a high near 19. Breezy, with a south wind 10 to 20 mph, with gusts as high as 31 mph. Chance of precipitation is 30%.
Saturday Night
Snow likely. Mostly cloudy, with a low around 12. South southwest wind 14 to 18 mph, with gusts as high as 31 mph. Chance of precipitation is 70%.
Sunday
A slight chance of snow before noon. Mostly cloudy, with a high near 28. West northwest wind 14 to 16 mph, with gusts as high as 26 mph. Chance of precipitation is 20%.
Sunday Night
Mostly cloudy, with a low around 13. West northwest wind 7 to 13 mph, with gusts as high as 21 mph.
Monday
Partly sunny, with a high near 23.
Monday Night
Mostly cloudy, with a low around 13.
Tuesday
A slight chance of snow. Mostly cloudy, with a high near 26. Chance of precipitation is 20%.
Tuesday Night
A slight chance of snow. Mostly cloudy, with a low around 16. Chance of precipitation is 20%.
Wednesday
Mostly cloudy, with a high near 26.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Grenville SD
 45.46°N 97.4°W (Elev. 1821 ft)
Last Update:
9:42 pm CST Jan 28, 2026
Forecast Valid:
9pm CST Jan 28, 2026-6pm CST Feb 4, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation