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

Heavy Rainfall for the Mid-Atlantic; Heat and Wildfire Concerns for the West

Slow moving showers and thunderstorms may result in flash flooding for portions of the mid-Atlantic region today into tonight. Meanwhile, excessive heat will continue to build across the West through Tuesday. Heat Advisories and Extreme Heat Warnings are in effect. Fire Weather concerns continue for the interior Northwest with dry and breezy conditions. Watching the tropics across the Southeast. Read More >

Hazardous Weather Conditions

Current conditions at

Watertown, Watertown Municipal Airport (KATY)

Lat: 44.9°NLon: 97.15°WElev: 1745ft.

Fair

88°F

31°C

Humidity 52%
Wind Speed S 10 G 18 mph
Barometer 29.93 in (1012.1 mb)
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Heat Index92°F (33°C)
Last update 14 Jul 3:53 pm CDT
Extended Forecast for

Watertown Municipal Airport SD

  • This Afternoon

    This Afternoon: Sunny and hot, with a high near 90. South southeast wind around 13 mph.

    High: 90 °F

    Hot

  • Tonight

    Tonight: A slight chance of showers and thunderstorms between 2am and 3am. Increasing clouds, with a low around 70. South southeast wind 10 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 20%.

    Low: 70 °F

    Mostly Clear
    then Slight
    Chance
    T-storms

  • Tuesday

    Tuesday: A chance of showers and thunderstorms after 4pm. Some of the storms could produce heavy rainfall. Mostly sunny, with a high near 85. South wind 10 to 13 mph becoming north in the afternoon. Winds could gust as high as 22 mph. Chance of precipitation is 30%.

    High: 85 °F

    Mostly Sunny
    then Heavy
    Rain

  • Tuesday Night

    Tuesday Night: Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Low around 59. North northeast wind around 14 mph, with gusts as high as 24 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 59 °F

    Heavy Rain

  • Wednesday

    Wednesday: A chance of showers, with thunderstorms also possible after 4pm. Mostly cloudy, with a high near 65. North northeast wind 14 to 16 mph, with gusts as high as 28 mph. Chance of precipitation is 40%.

    High: 65 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: A slight chance of showers and thunderstorms, then a chance of showers after 7pm. Mostly cloudy, with a low around 52. North northeast wind 8 to 16 mph, with gusts as high as 25 mph. Chance of precipitation is 30%.

    Low: 52 °F

    Slight Chance
    T-storms then
    Chance
    Showers

  • Thursday

    Thursday: Mostly sunny, with a high near 69. East northeast wind around 8 mph.

    High: 69 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 54. East wind around 8 mph.

    Low: 54 °F

    Partly Cloudy

  • Friday

    Friday: A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 74. South southeast wind 8 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 30%.

    High: 74 °F

    Slight Chance
    Showers then
    Chance
    T-storms

Detailed Forecast

This Afternoon
Sunny and hot, with a high near 90. South southeast wind around 13 mph.
Tonight
A slight chance of showers and thunderstorms between 2am and 3am. Increasing clouds, with a low around 70. South southeast wind 10 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 20%.
Tuesday
A chance of showers and thunderstorms after 4pm. Some of the storms could produce heavy rainfall. Mostly sunny, with a high near 85. South wind 10 to 13 mph becoming north in the afternoon. Winds could gust as high as 22 mph. Chance of precipitation is 30%.
Tuesday Night
Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Low around 59. North northeast wind around 14 mph, with gusts as high as 24 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
Wednesday
A chance of showers, with thunderstorms also possible after 4pm. Mostly cloudy, with a high near 65. North northeast wind 14 to 16 mph, with gusts as high as 28 mph. Chance of precipitation is 40%.
Wednesday Night
A slight chance of showers and thunderstorms, then a chance of showers after 7pm. Mostly cloudy, with a low around 52. North northeast wind 8 to 16 mph, with gusts as high as 25 mph. Chance of precipitation is 30%.
Thursday
Mostly sunny, with a high near 69. East northeast wind around 8 mph.
Thursday Night
Partly cloudy, with a low around 54. East wind around 8 mph.
Friday
A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 74. South southeast wind 8 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 30%.
Friday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 61. Chance of precipitation is 50%.
Saturday
A slight chance of showers. Mostly sunny, with a high near 77. Chance of precipitation is 20%.
Saturday Night
A slight chance of showers. Partly cloudy, with a low around 59. Chance of precipitation is 20%.
Sunday
Mostly sunny, with a high near 77.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Watertown Municipal Airport SD
 44.93°N 97.18°W (Elev. 1680 ft)
Last Update:
4:02 pm CDT Jul 14, 2025
Forecast Valid:
4pm CDT Jul 14, 2025-6pm CDT Jul 20, 2025
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation