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

Dangerous Heat and Possible Flooding

Dangerous heat will persist across the Southwest U.S. through Saturday with daytime highs of 110-115°F. Extreme Heat Warnings remain in effect. Dangerous heat will build across the southern Plains again beginning this weekend. Heavy to excessive rain over the Carolinas Friday may lead to isolated areas of flash flooding. Read More >

Hazardous Weather Conditions

Current conditions at

Watertown, Watertown Municipal Airport (KATY)

Lat: 44.9°NLon: 97.15°WElev: 1745ft.

Fair

80°F

27°C

Humidity 51%
Wind Speed S 16 mph
Barometer 30.02 in (1015.8 mb)
Dewpoint 60°F (16°C)
Visibility 10.00 mi
Heat Index81°F (27°C)
Last update 28 Aug 1:53 pm CDT
Extended Forecast for

2 Miles SSE Clark SD

  • This Afternoon

    This Afternoon: A slight chance of showers between 3pm and 5pm. Mostly cloudy, with a high near 83. South wind around 15 mph, with gusts as high as 23 mph. Chance of precipitation is 20%.

    High: 83 °F

    Slight Chance
    Showers

  • Tonight

    Tonight: Showers and thunderstorms likely before 4am, then a chance of showers. Increasing clouds, with a low around 66. South southeast wind 14 to 16 mph, with gusts as high as 26 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 66 °F

    Chance
    T-storms then
    Showers
    Likely

  • Saturday

    Saturday: Mostly sunny, with a high near 85. Southeast wind 7 to 11 mph, with gusts as high as 20 mph.

    High: 85 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A slight chance of showers and thunderstorms between 3am and 4am, then a chance of showers after 4am. Increasing clouds, with a low around 67. East wind 7 to 10 mph. Chance of precipitation is 30%.

    Low: 67 °F

    Partly Cloudy
    then Chance
    Showers

  • Sunday

    Sunday: Mostly sunny, with a high near 87. East wind around 11 mph becoming south in the afternoon. Winds could gust as high as 21 mph.

    High: 87 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 66. South wind around 9 mph becoming northwest after midnight.

    Low: 66 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 82. North northwest wind 9 to 11 mph, with gusts as high as 20 mph.

    High: 82 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 63. North wind around 6 mph becoming east after midnight.

    Low: 63 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 82. South southeast wind 7 to 9 mph. Chance of precipitation is 30%.

    High: 82 °F

    Mostly Sunny
    then Chance
    T-storms

Detailed Forecast

This Afternoon
A slight chance of showers between 3pm and 5pm. Mostly cloudy, with a high near 83. South wind around 15 mph, with gusts as high as 23 mph. Chance of precipitation is 20%.
Tonight
Showers and thunderstorms likely before 4am, then a chance of showers. Increasing clouds, with a low around 66. South southeast wind 14 to 16 mph, with gusts as high as 26 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Saturday
Mostly sunny, with a high near 85. Southeast wind 7 to 11 mph, with gusts as high as 20 mph.
Saturday Night
A slight chance of showers and thunderstorms between 3am and 4am, then a chance of showers after 4am. Increasing clouds, with a low around 67. East wind 7 to 10 mph. Chance of precipitation is 30%.
Sunday
Mostly sunny, with a high near 87. East wind around 11 mph becoming south in the afternoon. Winds could gust as high as 21 mph.
Sunday Night
Partly cloudy, with a low around 66. South wind around 9 mph becoming northwest after midnight.
Monday
Mostly sunny, with a high near 82. North northwest wind 9 to 11 mph, with gusts as high as 20 mph.
Monday Night
Partly cloudy, with a low around 63. North wind around 6 mph becoming east after midnight.
Tuesday
A chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 82. South southeast wind 7 to 9 mph. Chance of precipitation is 30%.
Tuesday Night
A chance of showers and thunderstorms before 1am, then a slight chance of showers. Partly cloudy, with a low around 63. Chance of precipitation is 30%.
Wednesday
Mostly sunny, with a high near 85.
Wednesday Night
A slight chance of showers and thunderstorms. Mostly clear, with a low around 66. Chance of precipitation is 20%.
Thursday
Mostly sunny, with a high near 85.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SSE Clark SD
 44.86°N 97.72°W (Elev. 1795 ft)
Last Update:
2:06 pm CDT Aug 28, 2026
Forecast Valid:
2pm CDT Aug 28, 2026-6pm CDT Sep 3, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation