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.

43°F

6°C

Humidity 86%
Wind Speed Calm
Barometer 30.09 in (1019.0 mb)
Dewpoint 39°F (4°C)
Visibility NA
Last update 8 Oct 6:56 am CDT
Extended Forecast for

Grenville SD

  • Today

    Today: Mostly cloudy, then gradually becoming sunny, with a high near 65. Calm wind becoming south southeast around 5 mph in the afternoon.

    High: 65 °F

    Decreasing
    Clouds

  • Tonight

    Tonight: Partly cloudy, with a low around 48. Southeast wind 5 to 10 mph.

    Low: 48 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 75. South southeast wind 11 to 15 mph, with gusts as high as 26 mph.

    High: 75 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 65. Breezy, with a south wind 14 to 20 mph, with gusts as high as 31 mph.

    Low: 65 °F

    Mostly Clear
    then Mostly
    Clear and
    Breezy

  • Saturday

    Saturday: Sunny, with a high near 79. Breezy, with a south wind 21 to 23 mph, with gusts as high as 37 mph.

    High: 79 °F

    Sunny and
    Breezy

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 58. South wind 15 to 17 mph, with gusts as high as 29 mph.

    Low: 58 °F

    Mostly Clear

  • Sunday

    Sunday: Partly sunny, with a high near 66. Southeast wind 14 to 16 mph becoming north in the afternoon. Winds could gust as high as 25 mph.

    High: 66 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: A slight chance of showers after 1am. Mostly cloudy, with a low around 41. North wind around 14 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.

    Low: 41 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Columbus Day

    Columbus Day: Showers likely, mainly before 1pm. Mostly cloudy, with a high near 50. North wind around 14 mph, with gusts as high as 25 mph. Chance of precipitation is 60%.

    High: 50 °F

    Showers
    Likely

Detailed Forecast

Today
Mostly cloudy, then gradually becoming sunny, with a high near 65. Calm wind becoming south southeast around 5 mph in the afternoon.
Tonight
Partly cloudy, with a low around 48. Southeast wind 5 to 10 mph.
Friday
Sunny, with a high near 75. South southeast wind 11 to 15 mph, with gusts as high as 26 mph.
Friday Night
Mostly clear, with a low around 65. Breezy, with a south wind 14 to 20 mph, with gusts as high as 31 mph.
Saturday
Sunny, with a high near 79. Breezy, with a south wind 21 to 23 mph, with gusts as high as 37 mph.
Saturday Night
Mostly clear, with a low around 58. South wind 15 to 17 mph, with gusts as high as 29 mph.
Sunday
Partly sunny, with a high near 66. Southeast wind 14 to 16 mph becoming north in the afternoon. Winds could gust as high as 25 mph.
Sunday Night
A slight chance of showers after 1am. Mostly cloudy, with a low around 41. North wind around 14 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.
Columbus Day
Showers likely, mainly before 1pm. Mostly cloudy, with a high near 50. North wind around 14 mph, with gusts as high as 25 mph. Chance of precipitation is 60%.
Monday Night
Mostly cloudy, with a low around 38.
Tuesday
Partly sunny, with a high near 53.
Tuesday Night
A slight chance of showers. Partly cloudy, with a low around 41. Chance of precipitation is 20%.
Wednesday
A chance of showers. Mostly sunny, with a high near 59. Chance of precipitation is 40%.
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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:
6:21 am CDT Oct 8, 2026
Forecast Valid:
7am CDT Oct 8, 2026-6pm CDT Oct 14, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation