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.

Fog

49°F

9°C

Humidity 100%
Wind Speed N 3 mph
Barometer 30.14 in (1020.4 mb)
Dewpoint 49°F (9°C)
Visibility 0.25 mi
Last update 27 Aug 6:53 am CDT
Extended Forecast for

Watertown SD

  • Today

    Today: Patchy fog before 9am.  Otherwise, sunny, with a high near 79. North wind 3 to 7 mph.

    High: 79 °F

    Patchy Fog
    then Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 55. Northeast wind around 6 mph becoming southeast after midnight.

    Low: 55 °F

    Mostly Clear

  • Friday

    Friday: A chance of showers and thunderstorms, mainly between 1pm and 2pm.  Increasing clouds, with a high near 83. South wind 8 to 15 mph, with gusts as high as 25 mph.  Chance of precipitation is 30%.

    High: 83 °F

    Mostly Sunny
    then Chance
    Showers

  • Friday Night

    Friday Night: Showers and possibly a thunderstorm.  Low around 63. South southeast wind 14 to 16 mph, with gusts as high as 28 mph.  Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 63 °F

    Showers

  • Saturday

    Saturday: Mostly sunny, with a high near 85. South wind 8 to 11 mph, with gusts as high as 21 mph.

    High: 85 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A slight chance of showers and thunderstorms after 1am.  Mostly cloudy, with a low around 65. East southeast wind around 8 mph.  Chance of precipitation is 20%.

    Low: 65 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

  • Sunday

    Sunday: Mostly sunny, with a high near 85. East wind 8 to 11 mph becoming south southwest in the afternoon. Winds could gust as high as 21 mph.

    High: 85 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: A slight chance of showers before 1am.  Partly cloudy, with a low around 63. Southwest wind 6 to 9 mph becoming north northeast after midnight.  Chance of precipitation is 20%.

    Low: 63 °F

    Slight Chance
    Showers

  • Monday

    Monday: Mostly sunny, with a high near 83. North northwest wind 7 to 11 mph, with gusts as high as 21 mph.

    High: 83 °F

    Mostly Sunny

Detailed Forecast

Today
Patchy fog before 9am. Otherwise, sunny, with a high near 79. North wind 3 to 7 mph.
Tonight
Mostly clear, with a low around 55. Northeast wind around 6 mph becoming southeast after midnight.
Friday
A chance of showers and thunderstorms, mainly between 1pm and 2pm. Increasing clouds, with a high near 83. South wind 8 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 30%.
Friday Night
Showers and possibly a thunderstorm. Low around 63. South southeast wind 14 to 16 mph, with gusts as high as 28 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Saturday
Mostly sunny, with a high near 85. South wind 8 to 11 mph, with gusts as high as 21 mph.
Saturday Night
A slight chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 65. East southeast wind around 8 mph. Chance of precipitation is 20%.
Sunday
Mostly sunny, with a high near 85. 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 63. Southwest wind 6 to 9 mph becoming north northeast after midnight. Chance of precipitation is 20%.
Monday
Mostly sunny, with a high near 83. North northwest wind 7 to 11 mph, with gusts as high as 21 mph.
Monday Night
Partly cloudy, with a low around 61.
Tuesday
Partly sunny, with a high near 82.
Tuesday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 62. Chance of precipitation is 30%.
Wednesday
Mostly sunny, with a high near 85.
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ABOUT THIS FORECAST

 
Point Forecast:
Watertown SD
 44.91°N 97.14°W (Elev. 1736 ft)
7:06 am CDT Aug 27, 2026
7am CDT Aug 27, 2026-6pm CDT Sep 2, 2026
 
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Additional Resources

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