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

71°F

22°C

Humidity 32%
Wind Speed N 12 mph
Barometer 29.64 in (1003.8 mb)
Dewpoint 40°F (4°C)
Visibility 10.00 mi
Last update 21 Mar 4:53 pm CDT
Extended Forecast for

4 Miles ESE Castlewood SD

  • Tonight

    Tonight: A chance of sprinkles before 4am, then a slight chance of rain between 4am and 5am, then a slight chance of rain and snow after 5am. Mostly cloudy, with a low around 31. Blustery, with a north northeast wind 7 to 12 mph increasing to 19 to 24 mph in the evening. Winds could gust as high as 37 mph. Chance of precipitation is 20%.

    Low: 31 °F

    Blustery.
    Partly Cloudy
    then Slight
    Chance
    Rain/Snow

  • Sunday

    Sunday: Cloudy through mid morning, then gradual clearing, with a high near 43. North wind 11 to 17 mph, with gusts as high as 26 mph.

    High: 43 °F

    Gradual
    Clearing

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 25. Northwest wind 5 to 9 mph becoming southeast after midnight.

    Low: 25 °F

    Mostly Clear

  • Monday

    Monday: Increasing clouds, with a high near 51. South wind 5 to 15 mph, with gusts as high as 23 mph.

    High: 51 °F

    Increasing
    Clouds

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 36. South wind 11 to 13 mph, with gusts as high as 22 mph.

    Low: 36 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 55. South wind 10 to 15 mph becoming east in the afternoon.

    High: 55 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 36. East wind 11 to 13 mph, with gusts as high as 21 mph.

    Low: 36 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 65. East wind 10 to 14 mph becoming west in the afternoon. Winds could gust as high as 22 mph.

    High: 65 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 35. West wind 10 to 14 mph becoming north after midnight. Winds could gust as high as 22 mph.

    Low: 35 °F

    Mostly Cloudy

Detailed Forecast

Tonight
A chance of sprinkles before 4am, then a slight chance of rain between 4am and 5am, then a slight chance of rain and snow after 5am. Mostly cloudy, with a low around 31. Blustery, with a north northeast wind 7 to 12 mph increasing to 19 to 24 mph in the evening. Winds could gust as high as 37 mph. Chance of precipitation is 20%.
Sunday
Cloudy through mid morning, then gradual clearing, with a high near 43. North wind 11 to 17 mph, with gusts as high as 26 mph.
Sunday Night
Mostly clear, with a low around 25. Northwest wind 5 to 9 mph becoming southeast after midnight.
Monday
Increasing clouds, with a high near 51. South wind 5 to 15 mph, with gusts as high as 23 mph.
Monday Night
Mostly cloudy, with a low around 36. South wind 11 to 13 mph, with gusts as high as 22 mph.
Tuesday
Mostly cloudy, with a high near 55. South wind 10 to 15 mph becoming east in the afternoon.
Tuesday Night
Mostly cloudy, with a low around 36. East wind 11 to 13 mph, with gusts as high as 21 mph.
Wednesday
Partly sunny, with a high near 65. East wind 10 to 14 mph becoming west in the afternoon. Winds could gust as high as 22 mph.
Wednesday Night
Mostly cloudy, with a low around 35. West wind 10 to 14 mph becoming north after midnight. Winds could gust as high as 22 mph.
Thursday
Partly sunny, with a high near 45. Breezy.
Thursday Night
Mostly cloudy, with a low around 21.
Friday
Partly sunny, with a high near 43.
Friday Night
Partly cloudy, with a low around 23.
Saturday
Mostly sunny, with a high near 47.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles ESE Castlewood SD
 44.72°N 96.96°W (Elev. 1749 ft)
Last Update:
5:36 pm CDT Mar 21, 2026
Forecast Valid:
5pm CDT Mar 21, 2026-6pm CDT Mar 28, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation