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.

81°F

27°C

Humidity 67%
Wind Speed S 16 mph
Barometer 29.87 in (1009.7 mb)
Dewpoint 69°F (21°C)
Visibility NA
Heat Index84°F (29°C)
Last update 24 Jul 1:56 pm CDT
Extended Forecast for

Grenville SD

Heat Advisory July 25, 01:00pm until July 26, 09:00pm
Click here for hazard details and duration
Heat Advisory

  • This Afternoon

    This Afternoon: Sunny, with a high near 84. South southwest wind around 11 mph, with gusts as high as 24 mph.

    High: 84 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 70. South southwest wind 11 to 15 mph, with gusts as high as 26 mph.

    Low: 70 °F

    Mostly Clear

  • Saturday

    Saturday: Patchy smoke after 1pm. Sunny and hot, with a high near 94. South southwest wind 5 to 8 mph becoming west northwest in the morning.

    High: 94 °F

    Sunny then
    Patchy Smoke

  • Saturday Night

    Saturday Night: A slight chance of showers and thunderstorms after 4am. Increasing clouds, with a low around 75. South wind 8 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.

    Low: 75 °F

    Mostly Cloudy
    then Slight
    Chance
    T-storms

  • Sunday

    Sunday: A slight chance of showers and thunderstorms before 1pm. Mostly sunny and hot, with a high near 91. South wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.

    High: 91 °F

    Slight Chance
    T-storms

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 72. South wind around 8 mph becoming north after midnight.

    Low: 72 °F

    Mostly Clear

  • Monday

    Monday: Sunny and hot, with a high near 91. North wind 7 to 9 mph, with gusts as high as 20 mph.

    High: 91 °F

    Hot

  • Monday Night

    Monday Night: Mostly clear, with a low around 69. North wind 5 to 7 mph becoming east after midnight.

    Low: 69 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 89. East wind 5 to 8 mph becoming west in the afternoon.

    High: 89 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 84. South southwest wind around 11 mph, with gusts as high as 24 mph.
Tonight
Mostly clear, with a low around 70. South southwest wind 11 to 15 mph, with gusts as high as 26 mph.
Saturday
Patchy smoke after 1pm. Sunny and hot, with a high near 94. South southwest wind 5 to 8 mph becoming west northwest in the morning.
Saturday Night
A slight chance of showers and thunderstorms after 4am. Increasing clouds, with a low around 75. South wind 8 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Sunday
A slight chance of showers and thunderstorms before 1pm. Mostly sunny and hot, with a high near 91. South wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Sunday Night
Mostly clear, with a low around 72. South wind around 8 mph becoming north after midnight.
Monday
Sunny and hot, with a high near 91. North wind 7 to 9 mph, with gusts as high as 20 mph.
Monday Night
Mostly clear, with a low around 69. North wind 5 to 7 mph becoming east after midnight.
Tuesday
Mostly sunny, with a high near 89. East wind 5 to 8 mph becoming west in the afternoon.
Tuesday Night
Mostly clear, with a low around 69.
Wednesday
Mostly sunny, with a high near 88.
Wednesday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 70. Chance of precipitation is 30%.
Thursday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 88. Chance of precipitation is 20%.
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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:
1:56 pm CDT Jul 24, 2026
Forecast Valid:
2pm CDT Jul 24, 2026-6pm CDT Jul 30, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation