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

Heavy Rain Across the Southern US; Unsettled Pattern in the Pacific Northwest

A storm system will bring heavy rainfall, thunderstorms, and flooding threats to portions of the Southern Plains Friday, the Lower Mississippi Valley Saturday, and the Southeast into the Mid-Atlantic on Sunday. High elevation snow and mixed precipitation and rain in the lower elevations will impact the Pacific Northwest this weekend before a stronger system moves in early next week. Read More >

Current conditions at

Sisseton, Sisseton Municipal Airport (K8D3)

Lat: 45.67°NLon: 96.99°WElev: 1161ft.

30°F

-1°C

Humidity 85%
Wind Speed W 5 mph
Barometer 30.05 in (1018.7 mb)
Dewpoint 26°F (-3°C)
Visibility NA
Wind Chill25°F (-4°C)
Last update 13 Feb 12:56 am CST
Extended Forecast for

Grenville SD

  • Overnight

    Overnight: Partly cloudy, with a low around 27. Calm wind becoming west southwest around 6 mph.

    Low: 27 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 51. South southwest wind around 7 mph.

    High: 51 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 32. South southwest wind 6 to 8 mph.

    Low: 32 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 50. West wind 6 to 9 mph.

    High: 50 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 32. West wind around 7 mph.

    Low: 32 °F

    Mostly Clear

  • Sunday

    Sunday: Partly sunny, with a high near 54. South southwest wind 7 to 11 mph, with gusts as high as 20 mph.

    High: 54 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 32. South wind 7 to 10 mph becoming north northwest after midnight.

    Low: 32 °F

    Partly Cloudy

  • Washington's Birthday

    Washington's Birthday: Sunny, with a high near 50. North northwest wind 7 to 10 mph becoming east in the afternoon.

    High: 50 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 34. East southeast wind 9 to 14 mph.

    Low: 34 °F

    Partly Cloudy

Detailed Forecast

Overnight
Partly cloudy, with a low around 27. Calm wind becoming west southwest around 6 mph.
Friday
Sunny, with a high near 51. South southwest wind around 7 mph.
Friday Night
Mostly clear, with a low around 32. South southwest wind 6 to 8 mph.
Saturday
Sunny, with a high near 50. West wind 6 to 9 mph.
Saturday Night
Mostly clear, with a low around 32. West wind around 7 mph.
Sunday
Partly sunny, with a high near 54. South southwest wind 7 to 11 mph, with gusts as high as 20 mph.
Sunday Night
Partly cloudy, with a low around 32. South wind 7 to 10 mph becoming north northwest after midnight.
Washington's Birthday
Sunny, with a high near 50. North northwest wind 7 to 10 mph becoming east in the afternoon.
Monday Night
Partly cloudy, with a low around 34. East southeast wind 9 to 14 mph.
Tuesday
A chance of rain after noon. Mostly cloudy, with a high near 48. Breezy. Chance of precipitation is 30%.
Tuesday Night
Rain and snow likely. Mostly cloudy, with a low around 28. Chance of precipitation is 70%.
Wednesday
A chance of rain and snow. Mostly cloudy, with a high near 36. Chance of precipitation is 50%.
Wednesday Night
A chance of snow. Mostly cloudy, with a low around 18. Chance of precipitation is 30%.
Thursday
A chance of snow. Mostly cloudy, with a high near 29. Chance of precipitation is 30%.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Grenville SD
 45.46°N 97.4°W (Elev. 1821 ft)
Last Update:
12:31 am CST Feb 13, 2026
Forecast Valid:
1am CST Feb 13, 2026-6pm CST Feb 19, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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