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.

48°F

9°C

Humidity 100%
Wind Speed SE 5 mph
Barometer 29.64 in (1004.4 mb)
Dewpoint 48°F (9°C)
Visibility NA
Wind Chill46°F (8°C)
Last update 11 Apr 11:56 pm CDT
Extended Forecast for

Grenville SD

Dense Fog Advisory April 12, 12:08am until April 12, 07:00am
Click here for hazard details and duration
Dense Fog Advisory
  •  
    Dense Fog Advisory April 12, 12:08am until April 12, 07:00am

    NOW until 7:00am Sun

    Dense Fog Advisory

  • Overnight

    Low: 54 °F

    Patchy Dense
    Fog

  • Sunday

    Sunday: Mostly cloudy through mid morning, then gradual clearing, with a high near 72. Breezy, with a south wind 15 to 21 mph becoming west in the afternoon. Winds could gust as high as 31 mph.

    High: 72 °F

    Mostly Sunny
    then Sunny
    and Breezy

  • Sunday Night

    Sunday Night: Patchy fog after 3am. Otherwise, increasing clouds, with a low around 43. West northwest wind 8 to 14 mph becoming east northeast after midnight. Winds could gust as high as 22 mph.

    Low: 43 °F

    Mostly Clear
    then Patchy
    Fog

  • Monday

    Monday: A chance of showers before 1pm, then a chance of showers and thunderstorms between 1pm and 4pm, then a chance of showers after 4pm. Patchy fog before 7am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 60. East wind 10 to 14 mph. Chance of precipitation is 40%.

    High: 60 °F

    Chance
    Showers and
    Patchy Fog

  • Monday Night

    Monday Night: A slight chance of showers before 1am. Partly cloudy, with a low around 39. North northeast wind 8 to 11 mph. Chance of precipitation is 20%.

    Low: 39 °F

    Slight Chance
    Showers

  • Tuesday

    Tuesday: A chance of showers, mainly after 1pm. Mostly cloudy, with a high near 60. North northwest wind 7 to 9 mph. Chance of precipitation is 40%.

    High: 60 °F

    Chance
    Showers

  • Tuesday Night

    Tuesday Night: A chance of showers, mainly before 1am. Mostly cloudy, with a low around 42. North wind 6 to 8 mph becoming south southeast after midnight. Chance of precipitation is 40%.

    Low: 42 °F

    Chance
    Showers

  • Wednesday

    Wednesday: A slight chance of showers before 1pm. Mostly sunny, with a high near 67. South wind 6 to 10 mph. Chance of precipitation is 20%.

    High: 67 °F

    Slight Chance
    Showers

Detailed Forecast

Overnight
Patchy dense fog before 3am. Otherwise, mostly cloudy, with a steady temperature around 54. South wind 11 to 17 mph, with gusts as high as 28 mph.
Sunday
Mostly cloudy through mid morning, then gradual clearing, with a high near 72. Breezy, with a south wind 15 to 21 mph becoming west in the afternoon. Winds could gust as high as 31 mph.
Sunday Night
Patchy fog after 3am. Otherwise, increasing clouds, with a low around 43. West northwest wind 8 to 14 mph becoming east northeast after midnight. Winds could gust as high as 22 mph.
Monday
A chance of showers before 1pm, then a chance of showers and thunderstorms between 1pm and 4pm, then a chance of showers after 4pm. Patchy fog before 7am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 60. East wind 10 to 14 mph. Chance of precipitation is 40%.
Monday Night
A slight chance of showers before 1am. Partly cloudy, with a low around 39. North northeast wind 8 to 11 mph. Chance of precipitation is 20%.
Tuesday
A chance of showers, mainly after 1pm. Mostly cloudy, with a high near 60. North northwest wind 7 to 9 mph. Chance of precipitation is 40%.
Tuesday Night
A chance of showers, mainly before 1am. Mostly cloudy, with a low around 42. North wind 6 to 8 mph becoming south southeast after midnight. Chance of precipitation is 40%.
Wednesday
A slight chance of showers before 1pm. Mostly sunny, with a high near 67. South wind 6 to 10 mph. Chance of precipitation is 20%.
Wednesday Night
Mostly clear, with a low around 45. Southeast wind 8 to 10 mph.
Thursday
Mostly sunny, with a high near 63.
Thursday Night
A chance of showers. Partly cloudy, with a low around 34. Chance of precipitation is 40%.
Friday
A chance of rain and snow showers. Mostly cloudy, with a high near 42. Breezy. Chance of precipitation is 40%.
Friday Night
A slight chance of snow showers. Mostly cloudy, with a low around 22. Blustery. Chance of precipitation is 20%.
Saturday
A slight chance of snow showers. Partly sunny, with a high near 42. Chance of precipitation is 20%.
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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:
11:56 pm CDT Apr 11, 2026
Forecast Valid:
12am CDT Apr 12, 2026-6pm CDT Apr 18, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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