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

Sisseton, Sisseton Municipal Airport (K8D3)

Lat: 45.67°NLon: 96.99°WElev: 1161ft.

67°F

19°C

Humidity 51%
Wind Speed NW 12 mph
Barometer 29.91 in (1012.2 mb)
Dewpoint 48°F (9°C)
Visibility NA
Last update 23 May 4:56 pm CDT
Extended Forecast for

Grenville SD

  • Tonight

    Tonight: Mostly clear, with a low around 45. West wind 5 to 8 mph becoming south southeast in the evening.

    Low: 45 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 75. South wind around 8 mph.

    High: 75 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 51. Light and variable wind becoming south 5 to 8 mph in the evening.

    Low: 51 °F

    Partly Cloudy

  • Memorial Day

    Memorial Day: Partly sunny, then gradually becoming sunny, with a high near 82. South southwest wind around 8 mph.

    High: 82 °F

    Becoming
    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 55. South wind 6 to 9 mph.

    Low: 55 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 83. South southeast wind 10 to 14 mph, with gusts as high as 24 mph.

    High: 83 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 57. Southeast wind 8 to 10 mph, with gusts as high as 20 mph.

    Low: 57 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 81. Southeast wind 8 to 14 mph, with gusts as high as 23 mph.

    High: 81 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 56. East southeast wind 9 to 11 mph, with gusts as high as 20 mph.

    Low: 56 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 45. West wind 5 to 8 mph becoming south southeast in the evening.
Sunday
Sunny, with a high near 75. South wind around 8 mph.
Sunday Night
Partly cloudy, with a low around 51. Light and variable wind becoming south 5 to 8 mph in the evening.
Memorial Day
Partly sunny, then gradually becoming sunny, with a high near 82. South southwest wind around 8 mph.
Monday Night
Mostly clear, with a low around 55. South wind 6 to 9 mph.
Tuesday
Sunny, with a high near 83. South southeast wind 10 to 14 mph, with gusts as high as 24 mph.
Tuesday Night
Partly cloudy, with a low around 57. Southeast wind 8 to 10 mph, with gusts as high as 20 mph.
Wednesday
Mostly sunny, with a high near 81. Southeast wind 8 to 14 mph, with gusts as high as 23 mph.
Wednesday Night
Partly cloudy, with a low around 56. East southeast wind 9 to 11 mph, with gusts as high as 20 mph.
Thursday
Partly sunny, with a high near 78.
Thursday Night
Mostly cloudy, with a low around 54.
Friday
A chance of showers and thunderstorms. Partly sunny, with a high near 75. Chance of precipitation is 30%.
Friday Night
A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 52. Chance of precipitation is 20%.
Saturday
A slight chance of showers. Partly sunny, with a high near 73. 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:
4:36 pm CDT May 23, 2026
Forecast Valid:
5pm CDT May 23, 2026-6pm CDT May 30, 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