National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Sisseton, Sisseton Municipal Airport (K8D3)

Lat: 45.67°NLon: 96.99°WElev: 1161ft.

65°F

18°C

Humidity 97%
Wind Speed SE 6 mph
Barometer 29.92 in (1012.1 mb)
Dewpoint 64°F (18°C)
Visibility NA
Last update 26 Sep 6:56 pm CDT
Extended Forecast for

Grenville SD

  • Tonight

    Tonight: A slight chance of showers between 1am and 2am. Patchy fog before 10pm, then patchy fog after 11pm. Otherwise, mostly cloudy, with a low around 59. South southeast wind 5 to 7 mph becoming light and variable after midnight. Chance of precipitation is 20%.

    Low: 59 °F

    Patchy Fog
    then Slight
    Chance
    Showers and
    Patchy Fog

  • Sunday

    Sunday: Widespread dense fog, mainly before 9am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 69. North northwest wind 5 to 8 mph becoming northeast in the afternoon.

    High: 69 °F

    Dense Fog
    then Mostly
    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 55. East wind around 7 mph.

    Low: 55 °F

    Partly Cloudy

  • Monday

    Monday: Mostly cloudy, with a high near 68. South southeast wind 9 to 15 mph, with gusts as high as 28 mph.

    High: 68 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: A chance of showers and thunderstorms before 1am, then showers and possibly a thunderstorm between 1am and 4am, then showers after 4am. Low around 59. South wind 13 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 59 °F

    Chance
    T-storms then
    Showers

  • Tuesday

    Tuesday: A chance of showers. Mostly cloudy, with a high near 67. Southwest wind 7 to 10 mph becoming west northwest in the afternoon. Chance of precipitation is 50%.

    High: 67 °F

    Chance
    Showers

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 54. Northwest wind around 5 mph becoming southwest after midnight.

    Low: 54 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 69. South southwest wind 6 to 8 mph.

    High: 69 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 53. Southwest wind 5 to 9 mph becoming northwest after midnight.

    Low: 53 °F

    Partly Cloudy

Detailed Forecast

Tonight
A slight chance of showers between 1am and 2am. Patchy fog before 10pm, then patchy fog after 11pm. Otherwise, mostly cloudy, with a low around 59. South southeast wind 5 to 7 mph becoming light and variable after midnight. Chance of precipitation is 20%.
Sunday
Widespread dense fog, mainly before 9am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 69. North northwest wind 5 to 8 mph becoming northeast in the afternoon.
Sunday Night
Partly cloudy, with a low around 55. East wind around 7 mph.
Monday
Mostly cloudy, with a high near 68. South southeast wind 9 to 15 mph, with gusts as high as 28 mph.
Monday Night
A chance of showers and thunderstorms before 1am, then showers and possibly a thunderstorm between 1am and 4am, then showers after 4am. Low around 59. South wind 13 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Tuesday
A chance of showers. Mostly cloudy, with a high near 67. Southwest wind 7 to 10 mph becoming west northwest in the afternoon. Chance of precipitation is 50%.
Tuesday Night
Partly cloudy, with a low around 54. Northwest wind around 5 mph becoming southwest after midnight.
Wednesday
Mostly sunny, with a high near 69. South southwest wind 6 to 8 mph.
Wednesday Night
Partly cloudy, with a low around 53. Southwest wind 5 to 9 mph becoming northwest after midnight.
Thursday
Mostly sunny, with a high near 64.
Thursday Night
Mostly clear, with a low around 49.
Friday
A slight chance of showers. Mostly sunny, with a high near 63. Chance of precipitation is 20%.
Friday Night
Partly cloudy, with a low around 49.
Saturday
Partly sunny, with a high near 60.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Grenville SD
 45.46°N 97.4°W (Elev. 1821 ft)
Last Update:
7:21 pm CDT Sep 26, 2026
Forecast Valid:
7pm CDT Sep 26, 2026-6pm CDT Oct 3, 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