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.

52°F

11°C

Humidity 93%
Wind Speed Calm
Barometer 29.95 in (1013.3 mb)
Dewpoint 50°F (10°C)
Visibility NA
Last update 21 Jun 5:56 am CDT
Extended Forecast for

Grenville SD

  • Today

    Today: Mostly cloudy, with a high near 69. East wind 6 to 13 mph, with gusts as high as 21 mph.

    High: 69 °F

    Mostly Cloudy

  • Tonight

    Tonight: Mostly cloudy, with a low around 52. Northeast wind 5 to 8 mph.

    Low: 52 °F

    Mostly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 72. Southeast wind around 5 mph.

    High: 72 °F

    Partly Sunny

  • Monday Night

    Monday Night: A chance of showers and thunderstorms between 10pm and 1am, then showers and possibly a thunderstorm after 1am. Low around 56. Southeast wind 6 to 8 mph. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 56 °F

    Chance
    Showers then
    Showers

  • Tuesday

    Tuesday: Showers and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. High near 72. South southwest wind 10 to 15 mph becoming west in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 72 °F

    Showers

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 52. West northwest wind 7 to 15 mph, with gusts as high as 24 mph.

    Low: 52 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 68. Northwest wind 11 to 14 mph, with gusts as high as 24 mph.

    High: 68 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 51. North northwest wind 6 to 11 mph becoming light north after midnight.

    Low: 51 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 72. North wind around 6 mph.

    High: 72 °F

    Mostly Sunny

Detailed Forecast

Today
Mostly cloudy, with a high near 69. East wind 6 to 13 mph, with gusts as high as 21 mph.
Tonight
Mostly cloudy, with a low around 52. Northeast wind 5 to 8 mph.
Monday
Partly sunny, with a high near 72. Southeast wind around 5 mph.
Monday Night
A chance of showers and thunderstorms between 10pm and 1am, then showers and possibly a thunderstorm after 1am. Low around 56. Southeast wind 6 to 8 mph. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tuesday
Showers and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. High near 72. South southwest wind 10 to 15 mph becoming west in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tuesday Night
Partly cloudy, with a low around 52. West northwest wind 7 to 15 mph, with gusts as high as 24 mph.
Wednesday
Mostly sunny, with a high near 68. Northwest wind 11 to 14 mph, with gusts as high as 24 mph.
Wednesday Night
Partly cloudy, with a low around 51. North northwest wind 6 to 11 mph becoming light north after midnight.
Thursday
Mostly sunny, with a high near 72. North wind around 6 mph.
Thursday Night
Partly cloudy, with a low around 54.
Friday
A chance of showers and thunderstorms. Partly sunny, with a high near 75. Chance of precipitation is 40%.
Friday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 59. Chance of precipitation is 50%.
Saturday
A chance of showers and thunderstorms. Mostly cloudy, with a high near 78. Breezy. Chance of precipitation is 40%.
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ABOUT THIS FORECAST

 
Point Forecast:
Grenville SD
 45.46°N 97.37°W (Elev. 1795 ft)
Last Update:
6:36 am CDT Jun 21, 2026
Forecast Valid:
6am CDT Jun 21, 2026-6pm CDT Jun 27, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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