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.

A Few Clouds

41°F

5°C

Humidity 57%
Wind Speed SE 5 mph
Barometer 30.26 in (1026.2 mb)
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Wind Chill38°F (3°C)
Last update 10 Apr 10:53 pm CDT
Extended Forecast for

4 Miles ESE Castlewood SD

  • Tonight

    Tonight: Mostly cloudy, with a steady temperature around 41. South southeast wind 5 to 13 mph, with gusts as high as 21 mph.

    Low: 41 °F

    Mostly Cloudy

  • Saturday

    Saturday: A chance of showers, mainly before 1pm. Mostly cloudy, with a high near 58. Breezy, with a south southeast wind 16 to 22 mph, with gusts as high as 33 mph. Chance of precipitation is 50%.

    High: 58 °F

    Chance
    Showers and
    Breezy

  • Saturday Night

    Saturday Night: A slight chance of showers between 10pm and 11pm. Mostly cloudy, with a low around 50. Breezy, with a south wind 18 to 21 mph, with gusts as high as 33 mph. Chance of precipitation is 20%.

    Low: 50 °F

    Breezy.
    Slight Chance
    Showers then
    Mostly Cloudy

  • Sunday

    Sunday: A slight chance of showers before 7am. Sunny, with a high near 78. Breezy, with a south southwest wind 18 to 22 mph, with gusts as high as 31 mph. Chance of precipitation is 10%.

    High: 78 °F

    Breezy.
    Slight Chance
    Showers then
    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 45. West wind 7 to 14 mph becoming northeast after midnight.

    Low: 45 °F

    Mostly Clear

  • Monday

    Monday: A chance of showers, with thunderstorms also possible after 4pm. Partly sunny, with a high near 71. East wind 9 to 14 mph. Chance of precipitation is 40%.

    High: 71 °F

    Chance
    Showers

  • Monday Night

    Monday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 48. East northeast wind 7 to 11 mph. Chance of precipitation is 30%.

    Low: 48 °F

    Chance
    Showers

  • Tuesday

    Tuesday: A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 66. North northeast wind 8 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 50%.

    High: 66 °F

    Chance
    Showers

  • Tuesday Night

    Tuesday Night: A chance of showers, mainly before 1am. Mostly cloudy, with a low around 42. North wind 8 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 40%.

    Low: 42 °F

    Chance
    Showers

Detailed Forecast

Tonight
Mostly cloudy, with a steady temperature around 41. South southeast wind 5 to 13 mph, with gusts as high as 21 mph.
Saturday
A chance of showers, mainly before 1pm. Mostly cloudy, with a high near 58. Breezy, with a south southeast wind 16 to 22 mph, with gusts as high as 33 mph. Chance of precipitation is 50%.
Saturday Night
A slight chance of showers between 10pm and 11pm. Mostly cloudy, with a low around 50. Breezy, with a south wind 18 to 21 mph, with gusts as high as 33 mph. Chance of precipitation is 20%.
Sunday
A slight chance of showers before 7am. Sunny, with a high near 78. Breezy, with a south southwest wind 18 to 22 mph, with gusts as high as 31 mph. Chance of precipitation is 10%.
Sunday Night
Mostly clear, with a low around 45. West wind 7 to 14 mph becoming northeast after midnight.
Monday
A chance of showers, with thunderstorms also possible after 4pm. Partly sunny, with a high near 71. East wind 9 to 14 mph. Chance of precipitation is 40%.
Monday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 48. East northeast wind 7 to 11 mph. Chance of precipitation is 30%.
Tuesday
A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 66. North northeast wind 8 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 50%.
Tuesday Night
A chance of showers, mainly before 1am. Mostly cloudy, with a low around 42. North wind 8 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 40%.
Wednesday
A chance of showers, mainly before 1pm. Mostly sunny, with a high near 67. Chance of precipitation is 30%.
Wednesday Night
A slight chance of showers. Mostly clear, with a low around 46. Chance of precipitation is 20%.
Thursday
A slight chance of showers. Sunny, with a high near 73. Breezy. Chance of precipitation is 20%.
Thursday Night
A chance of showers. Partly cloudy, with a low around 42. Chance of precipitation is 40%.
Friday
A chance of showers. Mostly sunny, with a high near 57. Breezy. Chance of precipitation is 30%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles ESE Castlewood SD
 44.72°N 96.96°W (Elev. 1749 ft)
Last Update:
11:06 pm CDT Apr 10, 2026
Forecast Valid:
11pm CDT Apr 10, 2026-6pm CDT Apr 17, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation