Winter Weather in the Eastern U.S.; Heavy Rains Begin Across the Southern Plains into the Ohio Valley

A wintry mix may impact travel across portions of the Mid-Atlantic through the morning and the Northeast U.S. through Tuesday. Heavy rain and thunderstorms may cause a flooding threat across the Southern Plains into the Ohio Valley beginning Tuesday. Fire weather concerns will continue across portions of the central and southern High Plains through Wednesday. Read More >

Current conditions at

Sisseton, Sisseton Municipal Airport (K8D3)

Lat: 45.67°NLon: 96.99°WElev: 1161ft.

33°F

1°C

Humidity 92%
Wind Speed S 9 mph
Barometer 30.00 in (1017.5 mb)
Dewpoint 31°F (-1°C)
Visibility NA
Wind Chill25°F (-4°C)
Last update 2 Mar 10:56 pm CST
Extended Forecast for

Grenville SD

  • Tonight

    Tonight: Mostly cloudy, with a low around 29. South southwest wind 6 to 9 mph.

    Low: 29 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 42. South southwest wind 5 to 7 mph becoming west northwest in the afternoon.

    High: 42 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Widespread dense fog, mainly between 9pm and 1am.  Otherwise, partly cloudy, with a low around 31. South wind 5 to 11 mph.

    Low: 31 °F

    Dense Fog

  • Wednesday

    Wednesday: Areas of fog before 11am.  Otherwise, sunny, with a high near 52. South southwest wind 11 to 16 mph, with gusts as high as 25 mph.

    High: 52 °F

    Areas Fog
    then Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 32. South wind around 10 mph.

    Low: 32 °F

    Mostly Clear

  • Thursday

    Thursday: Partly sunny, with a high near 57. Southeast wind 9 to 15 mph.

    High: 57 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: A chance of rain after midnight.  Mostly cloudy, with a low around 33. Southeast wind around 11 mph becoming northeast after midnight. Winds could gust as high as 20 mph.  Chance of precipitation is 30%.

    Low: 33 °F

    Mostly Cloudy
    then Chance
    Rain

  • Friday

    Friday: A chance of rain before noon, then a chance of rain and snow.  Mostly cloudy, with a high near 41. North wind 11 to 18 mph, with gusts as high as 28 mph.  Chance of precipitation is 40%.

    High: 41 °F

    Chance Rain
    then Chance
    Rain/Snow

  • Friday Night

    Friday Night: A chance of rain and snow before midnight.  Mostly cloudy, with a low around 24. North wind 10 to 17 mph, with gusts as high as 25 mph.  Chance of precipitation is 30%.

    Low: 24 °F

    Chance
    Rain/Snow
    then Partly
    Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 29. South southwest wind 6 to 9 mph.
Tuesday
Mostly sunny, with a high near 42. South southwest wind 5 to 7 mph becoming west northwest in the afternoon.
Tuesday Night
Widespread dense fog, mainly between 9pm and 1am. Otherwise, partly cloudy, with a low around 31. South wind 5 to 11 mph.
Wednesday
Areas of fog before 11am. Otherwise, sunny, with a high near 52. South southwest wind 11 to 16 mph, with gusts as high as 25 mph.
Wednesday Night
Mostly clear, with a low around 32. South wind around 10 mph.
Thursday
Partly sunny, with a high near 57. Southeast wind 9 to 15 mph.
Thursday Night
A chance of rain after midnight. Mostly cloudy, with a low around 33. Southeast wind around 11 mph becoming northeast after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 30%.
Friday
A chance of rain before noon, then a chance of rain and snow. Mostly cloudy, with a high near 41. North wind 11 to 18 mph, with gusts as high as 28 mph. Chance of precipitation is 40%.
Friday Night
A chance of rain and snow before midnight. Mostly cloudy, with a low around 24. North wind 10 to 17 mph, with gusts as high as 25 mph. Chance of precipitation is 30%.
Saturday
Sunny, with a high near 44. Breezy.
Saturday Night
Mostly clear, with a low around 33.
Sunday
Mostly sunny, with a high near 51. Breezy.
Sunday Night
Partly cloudy, with a low around 30.
Monday
A slight chance of rain and snow. Partly sunny, with a high near 50. Breezy. Chance of precipitation is 20%.
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ABOUT THIS FORECAST

 
Point Forecast:
Grenville SD
 45.46°N 97.4°W (Elev. 1821 ft)
11:16 pm CST Mar 2, 2026
11pm CST Mar 2, 2026-6pm CDT Mar 9, 2026
 
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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