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.

65°F

18°C

Humidity 73%
Wind Speed SE 3 mph
Barometer 30.03 in (1016.3 mb)
Dewpoint 56°F (13°C)
Visibility NA
Last update 29 Sep 7:56 pm CDT
Extended Forecast for

Grenville SD

  • Tonight

    Tonight: Partly cloudy, with a low around 62. Light southeast wind becoming south 5 to 10 mph in the evening.

    Low: 62 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 79. South wind 9 to 16 mph, with gusts as high as 28 mph.

    High: 79 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 65. South wind 14 to 18 mph, with gusts as high as 29 mph.

    Low: 65 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 80. Breezy, with a south wind 18 to 20 mph, with gusts as high as 33 mph.

    High: 80 °F

    Sunny and
    Breezy

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 64. South wind 14 to 16 mph, with gusts as high as 28 mph.

    Low: 64 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 83. South southwest wind 11 to 14 mph, with gusts as high as 23 mph.

    High: 83 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 66. South wind 9 to 14 mph, with gusts as high as 23 mph.

    Low: 66 °F

    Mostly Clear

  • Friday

    Friday: A slight chance of showers. Mostly sunny, with a high near 81. South southwest wind 11 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 20%.

    High: 81 °F

    Slight Chance
    Showers

  • Friday Night

    Friday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 55. North northwest wind around 11 mph, with gusts as high as 21 mph. Chance of precipitation is 40%.

    Low: 55 °F

    Chance
    Showers

Detailed Forecast

Tonight
Partly cloudy, with a low around 62. Light southeast wind becoming south 5 to 10 mph in the evening.
Tuesday
Mostly sunny, with a high near 79. South wind 9 to 16 mph, with gusts as high as 28 mph.
Tuesday Night
Mostly clear, with a low around 65. South wind 14 to 18 mph, with gusts as high as 29 mph.
Wednesday
Sunny, with a high near 80. Breezy, with a south wind 18 to 20 mph, with gusts as high as 33 mph.
Wednesday Night
Mostly clear, with a low around 64. South wind 14 to 16 mph, with gusts as high as 28 mph.
Thursday
Sunny, with a high near 83. South southwest wind 11 to 14 mph, with gusts as high as 23 mph.
Thursday Night
Mostly clear, with a low around 66. South wind 9 to 14 mph, with gusts as high as 23 mph.
Friday
A slight chance of showers. Mostly sunny, with a high near 81. South southwest wind 11 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 20%.
Friday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 55. North northwest wind around 11 mph, with gusts as high as 21 mph. Chance of precipitation is 40%.
Saturday
A chance of showers, mainly before 1pm. Mostly sunny, with a high near 71. Chance of precipitation is 30%.
Saturday Night
A chance of showers. Partly cloudy, with a low around 56. Chance of precipitation is 30%.
Sunday
A chance of showers. Partly sunny, with a high near 68. Chance of precipitation is 40%.
Sunday Night
A chance of showers. Mostly cloudy, with a low around 47. Chance of precipitation is 30%.
Monday
A chance of showers. Mostly sunny, with a high near 60. Chance of precipitation is 30%.
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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:
8:46 pm CDT Sep 29, 2025
Forecast Valid:
8pm CDT Sep 29, 2025-6pm CDT Oct 6, 2025
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation