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

Tropical Storm Edouard Along the Gulf Coast; Heat Expands Eastward

Tropical Storm Edouard off the central Gulf Coast will bring tropical storm conditions and heavy rainfall to portions of Upper Texas and southwestern Louisiana coasts Tuesday into Wednesday. Storm Surge Watches and Tropical Storm Warnings are in effect. Hot and humid conditions will continue to expand from the Central Plains into the Ohio Valley and Mid-Atlantic this week. Read More >

Current conditions at

Sisseton, Sisseton Municipal Airport (K8D3)

Lat: 45.67°NLon: 96.99°WElev: 1161ft.

66°F

19°C

Humidity 73%
Wind Speed W 8 mph
Barometer 29.92 in (1011.2 mb)
Dewpoint 57°F (14°C)
Visibility NA
Last update 1 Sep 2:56 am CDT
Extended Forecast for

Grenville SD

  • Overnight

    Overnight: Partly cloudy, with a steady temperature around 66. Light west wind.

    Low: 66 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Increasing clouds, with a high near 77. Calm wind becoming northwest around 5 mph in the afternoon.

    High: 77 °F

    Increasing
    Clouds

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms, mainly before 3am. Cloudy, then gradually becoming partly cloudy, with a low around 61. Light and variable wind becoming east around 5 mph in the evening. Chance of precipitation is 50%.

    Low: 61 °F

    Chance
    Showers

  • Wednesday

    Wednesday: Partly sunny, then gradually becoming sunny, with a high near 79. East southeast wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 79 °F

    Becoming
    Sunny

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 65. East southeast wind around 11 mph, with gusts as high as 21 mph. Chance of precipitation is 30%.

    Low: 65 °F

    Mostly Clear
    then Chance
    T-storms

  • Thursday

    Thursday: Sunny, with a high near 84. Southeast wind around 11 mph, with gusts as high as 23 mph.

    High: 84 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 67. Southeast wind 7 to 9 mph.

    Low: 67 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 86. Southeast wind 7 to 11 mph, with gusts as high as 21 mph.

    High: 86 °F

    Sunny

  • Friday Night

    Friday Night: A chance of showers and thunderstorms after 1am. Mostly clear, with a low around 70. Southeast wind around 11 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.

    Low: 70 °F

    Mostly Clear
    then Chance
    T-storms

Detailed Forecast

Overnight
Partly cloudy, with a steady temperature around 66. Light west wind.
Tuesday
Increasing clouds, with a high near 77. Calm wind becoming northwest around 5 mph in the afternoon.
Tuesday Night
A chance of showers and thunderstorms, mainly before 3am. Cloudy, then gradually becoming partly cloudy, with a low around 61. Light and variable wind becoming east around 5 mph in the evening. Chance of precipitation is 50%.
Wednesday
Partly sunny, then gradually becoming sunny, with a high near 79. East southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Wednesday Night
A chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 65. East southeast wind around 11 mph, with gusts as high as 21 mph. Chance of precipitation is 30%.
Thursday
Sunny, with a high near 84. Southeast wind around 11 mph, with gusts as high as 23 mph.
Thursday Night
Mostly clear, with a low around 67. Southeast wind 7 to 9 mph.
Friday
Sunny, with a high near 86. Southeast wind 7 to 11 mph, with gusts as high as 21 mph.
Friday Night
A chance of showers and thunderstorms after 1am. Mostly clear, with a low around 70. Southeast wind around 11 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.
Saturday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 84. Chance of precipitation is 20%.
Saturday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 67. Chance of precipitation is 30%.
Sunday
Mostly sunny, with a high near 79.
Sunday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 62. Chance of precipitation is 40%.
Labor Day
A chance of showers. Partly sunny, with a high near 75. Chance of precipitation is 40%.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Grenville SD
 45.46°N 97.4°W (Elev. 1821 ft)
Last Update:
3:06 am CDT Sep 1, 2026
Forecast Valid:
3am CDT Sep 1, 2026-6pm CDT Sep 7, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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