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.

54°F

12°C

Humidity 97%
Wind Speed Calm
Barometer 30.15 in (1020.1 mb)
Dewpoint 53°F (12°C)
Visibility NA
Last update 22 Aug 10:56 pm CDT
Extended Forecast for

Grenville SD

  • Tonight

    Tonight: Partly cloudy, with a low around 57. Southeast wind 3 to 6 mph.

    Low: 57 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 77. South southeast wind 6 to 9 mph.

    High: 77 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: A chance of showers before 1am, then a chance of showers and thunderstorms between 1am and 4am, then a chance of showers after 4am. Mostly cloudy, with a low around 62. Southeast wind 9 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 40%.

    Low: 62 °F

    Mostly Cloudy
    then Chance
    Showers

  • Monday

    Monday: A chance of showers before 1pm. Cloudy, then gradually becoming mostly sunny, with a high near 78. South southeast wind 9 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 30%.

    High: 78 °F

    Chance
    Showers

  • Monday Night

    Monday Night: A chance of showers before 10pm, then a chance of showers and thunderstorms between 10pm and 4am, then a chance of showers after 4am. Partly cloudy, with a low around 64. South wind around 8 mph. Chance of precipitation is 30%.

    Low: 64 °F

    Chance
    Showers

  • Tuesday

    Tuesday: Sunny, with a high near 80. West wind 8 to 17 mph, with gusts as high as 30 mph.

    High: 80 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 62. West northwest wind 7 to 14 mph.

    Low: 62 °F

    Mostly Clear

  • Wednesday

    Wednesday: A slight chance of showers and thunderstorms after 1pm. Sunny, with a high near 77. Northwest wind 8 to 15 mph. Chance of precipitation is 20%.

    High: 77 °F

    Sunny then
    Slight Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 60. North northwest wind 5 to 10 mph becoming light north after midnight.

    Low: 60 °F

    Mostly Clear

Detailed Forecast

Tonight
Partly cloudy, with a low around 57. Southeast wind 3 to 6 mph.
Sunday
Mostly sunny, with a high near 77. South southeast wind 6 to 9 mph.
Sunday Night
A chance of showers before 1am, then a chance of showers and thunderstorms between 1am and 4am, then a chance of showers after 4am. Mostly cloudy, with a low around 62. Southeast wind 9 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 40%.
Monday
A chance of showers before 1pm. Cloudy, then gradually becoming mostly sunny, with a high near 78. South southeast wind 9 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 30%.
Monday Night
A chance of showers before 10pm, then a chance of showers and thunderstorms between 10pm and 4am, then a chance of showers after 4am. Partly cloudy, with a low around 64. South wind around 8 mph. Chance of precipitation is 30%.
Tuesday
Sunny, with a high near 80. West wind 8 to 17 mph, with gusts as high as 30 mph.
Tuesday Night
Mostly clear, with a low around 62. West northwest wind 7 to 14 mph.
Wednesday
A slight chance of showers and thunderstorms after 1pm. Sunny, with a high near 77. Northwest wind 8 to 15 mph. Chance of precipitation is 20%.
Wednesday Night
Mostly clear, with a low around 60. North northwest wind 5 to 10 mph becoming light north after midnight.
Thursday
Sunny, with a high near 78.
Thursday Night
A slight chance of showers and thunderstorms. Mostly clear, with a low around 62. Chance of precipitation is 20%.
Friday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 79. Chance of precipitation is 20%.
Friday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 64. Chance of precipitation is 40%.
Saturday
A slight chance of showers. Mostly sunny, with a high near 79. Chance of precipitation is 20%.
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ABOUT THIS FORECAST

 
Point Forecast:
Grenville SD
 45.46°N 97.37°W (Elev. 1795 ft)
Last Update:
11:06 pm CDT Aug 22, 2026
Forecast Valid:
11pm CDT Aug 22, 2026-6pm CDT Aug 29, 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