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.

37°F

3°C

Humidity 100%
Wind Speed E 5 mph
Barometer 29.74 in (1008.0 mb)
Dewpoint 37°F (3°C)
Visibility NA
Wind Chill33°F (1°C)
Last update 15 Apr 7:56 am CDT
Extended Forecast for

Grenville SD

Fire Weather Watch April 16, 11:00am until April 16, 08:00pm
Dense Fog Advisory until April 15, 09:00am
Click here for hazard details and duration
Fire Weather Watch
...
  •  
    Dense Fog Advisory until April 15, 09:00am

    NOW until 9:00am Wed

    Dense Fog Advisory

  • Today

    High: 68 °F

    Patchy Dense
    Fog then
    Slight Chance
    Showers

  • Tonight

    Tonight: Mostly clear, with a low around 46. South wind 6 to 10 mph, with gusts as high as 20 mph.

    Low: 46 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 75. South wind 13 to 18 mph, with gusts as high as 29 mph.

    High: 75 °F

    Sunny

  • Thursday Night

    Thursday Night: A slight chance of showers after 1am. Increasing clouds, with a low around 33. Southwest wind 14 to 18 mph becoming north northeast in the evening. Winds could gust as high as 28 mph. Chance of precipitation is 20%.

    Low: 33 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

  • Friday

    Friday: A chance of snow showers, mainly before 1pm. Mostly cloudy, with a high near 40. Breezy, with a north northwest wind 18 to 23 mph, with gusts as high as 36 mph. Chance of precipitation is 40%.

    High: 40 °F

    Chance Snow
    Showers and
    Breezy

  • Friday Night

    Friday Night: A slight chance of snow showers after 1am. Mostly cloudy, with a low around 23. Blustery, with a north northwest wind 18 to 23 mph, with gusts as high as 34 mph. Chance of precipitation is 20%.

    Low: 23 °F

    Blustery.
    Mostly Cloudy
    then Slight
    Chance Snow
    Showers

  • Saturday

    Saturday: A slight chance of snow showers before 1pm. Partly sunny, with a high near 38. Breezy, with a northwest wind 18 to 22 mph, with gusts as high as 33 mph. Chance of precipitation is 20%.

    High: 38 °F

    Slight Chance
    Snow Showers
    and Breezy

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 24. Blustery, with a northwest wind 17 to 22 mph decreasing to 8 to 13 mph after midnight. Winds could gust as high as 34 mph.

    Low: 24 °F

    Partly Cloudy
    and Blustery
    then Mostly
    Clear

Detailed Forecast

Today
A slight chance of showers after 3pm. Patchy dense fog before 10am. Otherwise, partly sunny, then gradually becoming sunny, with a high near 68. South southeast wind 6 to 10 mph becoming west southwest in the afternoon. Chance of precipitation is 20%.
Tonight
Mostly clear, with a low around 46. South wind 6 to 10 mph, with gusts as high as 20 mph.
Thursday
Sunny, with a high near 75. South wind 13 to 18 mph, with gusts as high as 29 mph.
Thursday Night
A slight chance of showers after 1am. Increasing clouds, with a low around 33. Southwest wind 14 to 18 mph becoming north northeast in the evening. Winds could gust as high as 28 mph. Chance of precipitation is 20%.
Friday
A chance of snow showers, mainly before 1pm. Mostly cloudy, with a high near 40. Breezy, with a north northwest wind 18 to 23 mph, with gusts as high as 36 mph. Chance of precipitation is 40%.
Friday Night
A slight chance of snow showers after 1am. Mostly cloudy, with a low around 23. Blustery, with a north northwest wind 18 to 23 mph, with gusts as high as 34 mph. Chance of precipitation is 20%.
Saturday
A slight chance of snow showers before 1pm. Partly sunny, with a high near 38. Breezy, with a northwest wind 18 to 22 mph, with gusts as high as 33 mph. Chance of precipitation is 20%.
Saturday Night
Mostly clear, with a low around 24. Blustery, with a northwest wind 17 to 22 mph decreasing to 8 to 13 mph after midnight. Winds could gust as high as 34 mph.
Sunday
Sunny, with a high near 49. Northwest wind around 9 mph.
Sunday Night
Mostly clear, with a low around 33.
Monday
Mostly sunny, with a high near 66.
Monday Night
Mostly clear, with a low around 43.
Tuesday
Sunny, with a high near 66.
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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:
7:36 am CDT Apr 15, 2026
Forecast Valid:
7am CDT Apr 15, 2026-6pm CDT Apr 21, 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