Dangerous Heat in the Southwest; Severe Thunderstorms and Heavy Rain in the Northeast and Mid-Atlantic

Dangerous heat will persist across the Southwest U.S. through Friday with daytime highs of 110-115°F. Heat across the southern Plains will briefly ease to near-normal by late week. Strong to severe thunderstorms may produce damaging wind, hail, a tornado or two, heavy rain and flash flooding across parts of the Mid-Atlantic and Northeast. Heavy rainfall threat continues across the Gulf Coast. Read More >

Current conditions at

Watertown, Watertown Municipal Airport (KATY)

Lat: 44.9°NLon: 97.15°WElev: 1745ft.

Fair

76°F

24°C

Humidity 47%
Wind Speed N 9 mph
Barometer 30.16 in (1020.7 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 27 Aug 11:53 am CDT
Extended Forecast for

Watertown Municipal Airport SD

  • This Afternoon

    This Afternoon: Sunny, with a high near 80. North wind around 7 mph.

    High: 80 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 55. Light and variable wind becoming east southeast around 6 mph in the evening.

    Low: 55 °F

    Mostly Clear

  • Friday

    Friday: A slight chance of showers and thunderstorms after 4pm.  Increasing clouds, with a high near 84. South wind 7 to 15 mph, with gusts as high as 25 mph.  Chance of precipitation is 20%.

    High: 84 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Friday Night

    Friday Night: A chance of showers and thunderstorms before 1am, then showers likely and possibly a thunderstorm between 1am and 5am, then a chance of showers and thunderstorms after 5am.  Increasing clouds, with a low around 65. South wind 11 to 15 mph, with gusts as high as 28 mph.  Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 65 °F

    Chance
    T-storms then
    Showers
    Likely

  • Saturday

    Saturday: A slight chance of showers and thunderstorms before 7am.  Mostly sunny, with a high near 86. South wind 8 to 11 mph, with gusts as high as 21 mph.  Chance of precipitation is 10%.

    High: 86 °F

    Slight Chance
    T-storms then
    Mostly Sunny

  • Saturday Night

    Saturday Night: A slight chance of showers and thunderstorms after 1am.  Partly cloudy, with a low around 66. East southeast wind around 8 mph.  Chance of precipitation is 20%.

    Low: 66 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

  • Sunday

    Sunday: Mostly sunny, with a high near 86. East wind 8 to 11 mph becoming south southwest in the afternoon. Winds could gust as high as 21 mph.

    High: 86 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: A slight chance of showers before 1am.  Partly cloudy, with a low around 64. Southwest wind 6 to 9 mph becoming north northeast after midnight.  Chance of precipitation is 20%.

    Low: 64 °F

    Slight Chance
    Showers

  • Monday

    Monday: Mostly sunny, with a high near 84. North northwest wind 7 to 10 mph, with gusts as high as 21 mph.

    High: 84 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 80. North wind around 7 mph.
Tonight
Mostly clear, with a low around 55. Light and variable wind becoming east southeast around 6 mph in the evening.
Friday
A slight chance of showers and thunderstorms after 4pm. Increasing clouds, with a high near 84. South wind 7 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.
Friday Night
A chance of showers and thunderstorms before 1am, then showers likely and possibly a thunderstorm between 1am and 5am, then a chance of showers and thunderstorms after 5am. Increasing clouds, with a low around 65. South wind 11 to 15 mph, with gusts as high as 28 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Saturday
A slight chance of showers and thunderstorms before 7am. Mostly sunny, with a high near 86. South wind 8 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 10%.
Saturday Night
A slight chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 66. East southeast wind around 8 mph. Chance of precipitation is 20%.
Sunday
Mostly sunny, with a high near 86. East wind 8 to 11 mph becoming south southwest in the afternoon. Winds could gust as high as 21 mph.
Sunday Night
A slight chance of showers before 1am. Partly cloudy, with a low around 64. Southwest wind 6 to 9 mph becoming north northeast after midnight. Chance of precipitation is 20%.
Monday
Mostly sunny, with a high near 84. North northwest wind 7 to 10 mph, with gusts as high as 21 mph.
Monday Night
Partly cloudy, with a low around 60.
Tuesday
Partly sunny, with a high near 83.
Tuesday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 61. Chance of precipitation is 30%.
Wednesday
Mostly sunny, with a high near 85.
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ABOUT THIS FORECAST

 
Point Forecast:
Watertown Municipal Airport SD
 44.93°N 97.15°W (Elev. 1709 ft)
12:06 pm CDT Aug 27, 2026
12pm CDT Aug 27, 2026-6pm CDT Sep 2, 2026
 
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Additional Resources

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