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.

78°F

26°C

Humidity 19%
Wind Speed S 9 mph
Barometer 30.00 in (1015.2 mb)
Dewpoint 33°F (1°C)
Visibility NA
Heat Index77°F (25°C)
Last update 13 May 4:56 pm CDT
Extended Forecast for

Grenville SD

Fire Weather Watch May 15, 10:00am until May 15, 10:00pm
Red Flag Warning May 14, 10:00am until May 14, 07:00pm
Click here for hazard details and duration
Fire Weather Watch
Red Flag Warning

  • Tonight

    Tonight: Patchy blowing dust after 3am. Increasing clouds, with a low around 52. Breezy, with a southeast wind 7 to 12 mph increasing to 18 to 23 mph after midnight. Winds could gust as high as 38 mph.

    Low: 52 °F

    Mostly Clear
    then Patchy
    Blowing Dust
    and Breezy

  • Thursday

    Thursday: Patchy blowing dust before 4pm. Mostly cloudy, then gradually becoming sunny, with a high near 76. Windy, with a south wind 27 to 32 mph becoming west southwest 21 to 26 mph in the afternoon. Winds could gust as high as 47 mph.

    High: 76 °F

    Patchy
    Blowing Dust
    and Windy

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 48. West southwest wind 10 to 16 mph, with gusts as high as 26 mph.

    Low: 48 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 74. Breezy, with a west wind 13 to 18 mph increasing to 19 to 24 mph in the afternoon. Winds could gust as high as 38 mph.

    High: 74 °F

    Sunny and
    Breezy

  • Friday Night

    Friday Night: Partly cloudy, with a low around 45. Breezy, with a west wind 15 to 20 mph decreasing to 7 to 12 mph after midnight. Winds could gust as high as 32 mph.

    Low: 45 °F

    Mostly Clear
    and Breezy
    then Partly
    Cloudy

  • Saturday

    Saturday: Sunny, with a high near 69. North northwest wind 6 to 10 mph.

    High: 69 °F

    Sunny

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 44. East wind 10 to 16 mph, with gusts as high as 29 mph. Chance of precipitation is 30%.

    Low: 44 °F

    Partly Cloudy
    then Chance
    Showers

  • Sunday

    Sunday: Showers and possibly a thunderstorm. High near 64. Breezy, with a southeast wind 20 to 23 mph, with gusts as high as 37 mph. Chance of precipitation is 80%.

    High: 64 °F

    Showers and
    Breezy

  • Sunday Night

    Sunday Night: Showers and possibly a thunderstorm. Low around 45. East northeast wind 13 to 15 mph becoming north after midnight. Winds could gust as high as 23 mph. Chance of precipitation is 80%.

    Low: 45 °F

    Showers

Detailed Forecast

Tonight
Patchy blowing dust after 3am. Increasing clouds, with a low around 52. Breezy, with a southeast wind 7 to 12 mph increasing to 18 to 23 mph after midnight. Winds could gust as high as 38 mph.
Thursday
Patchy blowing dust before 4pm. Mostly cloudy, then gradually becoming sunny, with a high near 76. Windy, with a south wind 27 to 32 mph becoming west southwest 21 to 26 mph in the afternoon. Winds could gust as high as 47 mph.
Thursday Night
Mostly clear, with a low around 48. West southwest wind 10 to 16 mph, with gusts as high as 26 mph.
Friday
Sunny, with a high near 74. Breezy, with a west wind 13 to 18 mph increasing to 19 to 24 mph in the afternoon. Winds could gust as high as 38 mph.
Friday Night
Partly cloudy, with a low around 45. Breezy, with a west wind 15 to 20 mph decreasing to 7 to 12 mph after midnight. Winds could gust as high as 32 mph.
Saturday
Sunny, with a high near 69. North northwest wind 6 to 10 mph.
Saturday Night
A chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 44. East wind 10 to 16 mph, with gusts as high as 29 mph. Chance of precipitation is 30%.
Sunday
Showers and possibly a thunderstorm. High near 64. Breezy, with a southeast wind 20 to 23 mph, with gusts as high as 37 mph. Chance of precipitation is 80%.
Sunday Night
Showers and possibly a thunderstorm. Low around 45. East northeast wind 13 to 15 mph becoming north after midnight. Winds could gust as high as 23 mph. Chance of precipitation is 80%.
Monday
A chance of showers and thunderstorms. Mostly cloudy, with a high near 57. Breezy. Chance of precipitation is 50%.
Monday Night
A chance of showers. Mostly cloudy, with a low around 38. Breezy. Chance of precipitation is 30%.
Tuesday
A slight chance of showers. Mostly cloudy, with a high near 52. Chance of precipitation is 20%.
Tuesday Night
Partly cloudy, with a low around 38.
Wednesday
A slight chance of showers. Partly sunny, with a high near 61. 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 97.37°W (Elev. 1795 ft)
Last Update:
5:36 pm CDT May 13, 2026
Forecast Valid:
5pm CDT May 13, 2026-6pm CDT May 20, 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