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

Hazardous Weather Conditions

Current conditions at

Watertown, Watertown Municipal Airport (KATY)

Lat: 44.9°NLon: 97.15°WElev: 1745ft.

Fair

86°F

30°C

Humidity 61%
Wind Speed S 10 mph
Barometer 29.82 in (1008.3 mb)
Dewpoint 71°F (22°C)
Visibility 10.00 mi
Heat Index91°F (33°C)
Last update 26 Jul 11:53 am CDT
Extended Forecast for

Henry SD

Extreme Heat Warning July 26, 12:34pm until July 26, 09:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning July 26, 12:34pm until July 26, 09:00pm

    NOW until 9:00pm Sun

    Extreme Heat Warning

  • This Afternoon

    High: 95 °F

    Slight Chance
    Showers

  • Tonight

    Tonight: Mostly clear, with a low around 73. Southwest wind 5 to 8 mph becoming north northwest after midnight.

    Low: 73 °F

    Mostly Clear

  • Monday

    Monday: Patchy smoke before 1pm. Mostly sunny and hot, with a high near 92. North wind 10 to 13 mph.

    High: 92 °F

    Patchy Smoke

  • Monday Night

    Monday Night: Increasing clouds, with a low around 70. North wind 5 to 7 mph.

    Low: 70 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: Mostly sunny and hot, with a high near 91. South southwest wind 5 to 8 mph.

    High: 91 °F

    Hot

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 70. South wind 7 to 9 mph.

    Low: 70 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 92. South wind 9 to 13 mph.

    High: 92 °F

    Hot

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 71. South wind around 10 mph. Chance of precipitation is 30%.

    Low: 71 °F

    Chance
    Showers

Detailed Forecast

This Afternoon
A slight chance of showers before 1pm. Mostly sunny and hot, with a high near 95. Heat index values as high as 103. South wind 5 to 10 mph. Chance of precipitation is 20%.
Tonight
Mostly clear, with a low around 73. Southwest wind 5 to 8 mph becoming north northwest after midnight.
Monday
Patchy smoke before 1pm. Mostly sunny and hot, with a high near 92. North wind 10 to 13 mph.
Monday Night
Increasing clouds, with a low around 70. North wind 5 to 7 mph.
Tuesday
Mostly sunny and hot, with a high near 91. South southwest wind 5 to 8 mph.
Tuesday Night
Mostly clear, with a low around 70. South wind 7 to 9 mph.
Wednesday
Sunny and hot, with a high near 92. South wind 9 to 13 mph.
Wednesday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 71. South wind around 10 mph. Chance of precipitation is 30%.
Thursday
A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 84. South wind 10 to 13 mph. Chance of precipitation is 60%.
Thursday Night
A chance of showers and thunderstorms, mainly before 1am. Partly cloudy, with a low around 67. Chance of precipitation is 50%.
Friday
Sunny, with a high near 85.
Friday Night
Mostly clear, with a low around 66.
Saturday
Sunny, with a high near 86.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Henry SD
 44.88°N 97.45°W (Elev. 1801 ft)
Last Update:
12:11 pm CDT Jul 26, 2026
Forecast Valid:
12pm CDT Jul 26, 2026-6pm CDT Aug 1, 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