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

Watertown, Watertown Municipal Airport (KATY)

Lat: 44.9°NLon: 97.15°WElev: 1745ft.

Fair

76°F

24°C

Humidity 74%
Wind Speed SE 6 mph
Barometer 30.03 in (1015.8 mb)
Dewpoint 67°F (19°C)
Visibility 10.00 mi
Heat Index77°F (25°C)
Last update 5 Jul 9:53 pm CDT
Extended Forecast for

Watertown Municipal Airport SD

  • Tonight

    Tonight: Mostly clear, with a low around 66. Southeast wind 6 to 9 mph.

    Low: 66 °F

    Mostly Clear

  • Monday

    Monday: Increasing clouds, with a high near 88. South wind 10 to 14 mph, with gusts as high as 23 mph.

    High: 88 °F

    Increasing
    Clouds

  • Monday Night

    Monday Night: Showers and thunderstorms likely, mainly before 3am. Increasing clouds, with a low around 69. South wind 7 to 9 mph becoming east in the evening. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 69 °F

    T-storms
    Likely

  • Tuesday

    Tuesday: A chance of showers and thunderstorms, mainly after 1pm. Mostly cloudy, with a high near 87. Southeast wind 8 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 50%.

    High: 87 °F

    Slight Chance
    T-storms then
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Showers and possibly a thunderstorm. Low around 67. East southeast wind 10 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 90%. New rainfall amounts between 1 and 2 inches possible.

    Low: 67 °F

    Showers

  • Wednesday

    Wednesday: A chance of showers and thunderstorms, mainly before 1pm. Mostly cloudy, with a high near 79. North wind around 11 mph, with gusts as high as 21 mph. Chance of precipitation is 40%.

    High: 79 °F

    Chance
    T-storms then
    Chance
    Showers

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 59. North northeast wind 5 to 11 mph, with gusts as high as 20 mph.

    Low: 59 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 80. East wind 6 to 8 mph.

    High: 80 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 61. East wind around 5 mph becoming light and variable after midnight.

    Low: 61 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 66. Southeast wind 6 to 9 mph.
Monday
Increasing clouds, with a high near 88. South wind 10 to 14 mph, with gusts as high as 23 mph.
Monday Night
Showers and thunderstorms likely, mainly before 3am. Increasing clouds, with a low around 69. South wind 7 to 9 mph becoming east in the evening. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Tuesday
A chance of showers and thunderstorms, mainly after 1pm. Mostly cloudy, with a high near 87. Southeast wind 8 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 50%.
Tuesday Night
Showers and possibly a thunderstorm. Low around 67. East southeast wind 10 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 90%. New rainfall amounts between 1 and 2 inches possible.
Wednesday
A chance of showers and thunderstorms, mainly before 1pm. Mostly cloudy, with a high near 79. North wind around 11 mph, with gusts as high as 21 mph. Chance of precipitation is 40%.
Wednesday Night
Partly cloudy, with a low around 59. North northeast wind 5 to 11 mph, with gusts as high as 20 mph.
Thursday
Mostly sunny, with a high near 80. East wind 6 to 8 mph.
Thursday Night
Partly cloudy, with a low around 61. East wind around 5 mph becoming light and variable after midnight.
Friday
Mostly sunny, with a high near 83.
Friday Night
Mostly clear, with a low around 63.
Saturday
Mostly sunny, with a high near 87.
Saturday Night
Mostly clear, with a low around 69.
Sunday
Sunny and hot, with a high near 93.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Watertown Municipal Airport SD
 44.91°N 97.14°W (Elev. 1736 ft)
Last Update:
10:36 pm CDT Jul 5, 2026
Forecast Valid:
10pm CDT Jul 5, 2026-6pm CDT Jul 12, 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