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

50°F

10°C

Humidity 57%
Wind Speed Calm
Barometer 30.11 in (1019.8 mb)
Dewpoint 35°F (2°C)
Visibility 10.00 mi
Last update 12 May 10:53 pm CDT
Extended Forecast for

3 Miles N Altamont SD

  • Tonight

    Tonight: Mostly clear, with a low around 43. North northwest wind 5 to 9 mph.

    Low: 43 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 75. Light and variable wind becoming north northwest around 6 mph in the afternoon.

    High: 75 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 50. Breezy, with an east northeast wind 5 to 10 mph becoming south southeast 15 to 20 mph after midnight. Winds could gust as high as 32 mph.

    Low: 50 °F

    Mostly Clear
    then Partly
    Cloudy and
    Breezy

  • Thursday

    Thursday: A chance of showers, with thunderstorms also possible after 4pm. Patchy blowing dust before 4pm. Increasing clouds, with a high near 79. Windy, with a south wind 24 to 31 mph, with gusts as high as 45 mph. Chance of precipitation is 30%.

    High: 79 °F

    Chance
    Showers and
    Windy

  • Thursday Night

    Thursday Night: A slight chance of showers and thunderstorms before 7pm, then a slight chance of showers between 7pm and 1am. Partly cloudy, with a low around 49. Southwest wind 10 to 17 mph, with gusts as high as 28 mph. Chance of precipitation is 20%.

    Low: 49 °F

    Slight Chance
    T-storms then
    Slight Chance
    Showers

  • Friday

    Friday: Sunny, with a high near 77. Breezy, with a west wind 16 to 24 mph, with gusts as high as 39 mph.

    High: 77 °F

    Sunny and
    Breezy

  • Friday Night

    Friday Night: Mostly clear, with a low around 47. Breezy, with a west wind 15 to 20 mph decreasing to 7 to 12 mph after midnight. Winds could gust as high as 32 mph.

    Low: 47 °F

    Clear and
    Breezy then
    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 75. Northwest wind 6 to 11 mph becoming east in the afternoon. Winds could gust as high as 22 mph.

    High: 75 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A chance of showers, mainly after 1am. Mostly cloudy, with a low around 49. East southeast wind 11 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 40%.

    Low: 49 °F

    Chance
    Showers

Detailed Forecast

Tonight
Mostly clear, with a low around 43. North northwest wind 5 to 9 mph.
Wednesday
Sunny, with a high near 75. Light and variable wind becoming north northwest around 6 mph in the afternoon.
Wednesday Night
Partly cloudy, with a low around 50. Breezy, with an east northeast wind 5 to 10 mph becoming south southeast 15 to 20 mph after midnight. Winds could gust as high as 32 mph.
Thursday
A chance of showers, with thunderstorms also possible after 4pm. Patchy blowing dust before 4pm. Increasing clouds, with a high near 79. Windy, with a south wind 24 to 31 mph, with gusts as high as 45 mph. Chance of precipitation is 30%.
Thursday Night
A slight chance of showers and thunderstorms before 7pm, then a slight chance of showers between 7pm and 1am. Partly cloudy, with a low around 49. Southwest wind 10 to 17 mph, with gusts as high as 28 mph. Chance of precipitation is 20%.
Friday
Sunny, with a high near 77. Breezy, with a west wind 16 to 24 mph, with gusts as high as 39 mph.
Friday Night
Mostly clear, with a low around 47. Breezy, with a west wind 15 to 20 mph decreasing to 7 to 12 mph after midnight. Winds could gust as high as 32 mph.
Saturday
Mostly sunny, with a high near 75. Northwest wind 6 to 11 mph becoming east in the afternoon. Winds could gust as high as 22 mph.
Saturday Night
A chance of showers, mainly after 1am. Mostly cloudy, with a low around 49. East southeast wind 11 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 40%.
Sunday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 74. Breezy. Chance of precipitation is 60%.
Sunday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 48. Chance of precipitation is 50%.
Monday
A slight chance of showers. Mostly cloudy, with a high near 66. Breezy. Chance of precipitation is 20%.
Monday Night
A slight chance of showers. Mostly cloudy, with a low around 42. Chance of precipitation is 20%.
Tuesday
Mostly sunny, with a high near 68.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles N Altamont SD
 44.89°N 96.69°W (Elev. 1729 ft)
Last Update:
10:36 pm CDT May 12, 2026
Forecast Valid:
11pm CDT May 12, 2026-6pm CDT May 19, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation