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.

57°F

14°C

Humidity 58%
Wind Speed S 8 mph
Barometer 29.94 in (1013.6 mb)
Dewpoint 42°F (6°C)
Visibility NA
Last update 3 Oct 8:56 am CDT
Extended Forecast for

Grenville SD

  • Today

    Today: Scattered showers, mainly between 11am and 3pm. Mostly cloudy, then gradually becoming sunny, with a high near 67. Breezy, with a south southwest wind 17 to 22 mph becoming west 11 to 16 mph in the afternoon. Chance of precipitation is 50%.

    High: 67 °F

    Scattered
    Showers and
    Breezy

  • Tonight

    Tonight: Mostly clear, with a low around 46. Northwest wind 7 to 13 mph, with gusts as high as 24 mph.

    Low: 46 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 64. West northwest wind 5 to 9 mph.

    High: 64 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 46. Light and variable wind becoming southeast around 6 mph after midnight.

    Low: 46 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 67. South southeast wind 8 to 17 mph, with gusts as high as 30 mph.

    High: 67 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 55. South wind 13 to 16 mph, with gusts as high as 28 mph.

    Low: 55 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 74. South southwest wind 9 to 11 mph becoming west northwest in the afternoon. Winds could gust as high as 22 mph.

    High: 74 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 52. North northwest wind around 6 mph.

    Low: 52 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 69. West northwest wind 6 to 8 mph.

    High: 69 °F

    Sunny

Detailed Forecast

Today
Scattered showers, mainly between 11am and 3pm. Mostly cloudy, then gradually becoming sunny, with a high near 67. Breezy, with a south southwest wind 17 to 22 mph becoming west 11 to 16 mph in the afternoon. Chance of precipitation is 50%.
Tonight
Mostly clear, with a low around 46. Northwest wind 7 to 13 mph, with gusts as high as 24 mph.
Sunday
Sunny, with a high near 64. West northwest wind 5 to 9 mph.
Sunday Night
Clear, with a low around 46. Light and variable wind becoming southeast around 6 mph after midnight.
Monday
Sunny, with a high near 67. South southeast wind 8 to 17 mph, with gusts as high as 30 mph.
Monday Night
Mostly clear, with a low around 55. South wind 13 to 16 mph, with gusts as high as 28 mph.
Tuesday
Sunny, with a high near 74. South southwest wind 9 to 11 mph becoming west northwest in the afternoon. Winds could gust as high as 22 mph.
Tuesday Night
Mostly clear, with a low around 52. North northwest wind around 6 mph.
Wednesday
Sunny, with a high near 69. West northwest wind 6 to 8 mph.
Wednesday Night
Partly cloudy, with a low around 52.
Thursday
Mostly sunny, with a high near 67.
Thursday Night
Mostly clear, with a low around 51.
Friday
Sunny, with a high near 70.
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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:
9:11 am CDT Oct 3, 2026
Forecast Valid:
9am CDT Oct 3, 2026-6pm CDT Oct 9, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation