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

64°F

18°C

Humidity 33%
Wind Speed Calm
Barometer 29.83 in (1010.6 mb)
Dewpoint 34°F (1°C)
Visibility 10.00 mi
Last update 29 Mar 2:53 pm CDT
Extended Forecast for

4 Miles ESE Castlewood SD

  • This Afternoon

    This Afternoon: Sunny, with a high near 70. Light west northwest wind.

    High: 70 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 36. North wind 6 to 10 mph becoming east northeast after midnight.

    Low: 36 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 70. East northeast wind 10 to 15 mph becoming west in the afternoon. Winds could gust as high as 24 mph.

    High: 70 °F

    Mostly Sunny

  • Monday Night

    Monday Night: A slight chance of rain after 1am. Mostly cloudy, with a low around 35. Breezy, with an east northeast wind 10 to 15 mph increasing to 18 to 23 mph after midnight. Winds could gust as high as 40 mph. Chance of precipitation is 20%.

    Low: 35 °F

    Partly Cloudy
    then Slight
    Chance Rain
    and Breezy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 45. Breezy, with a north northwest wind 21 to 24 mph, with gusts as high as 36 mph.

    High: 45 °F

    Mostly Cloudy
    and Breezy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 22. Northeast wind 10 to 16 mph, with gusts as high as 25 mph.

    Low: 22 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A chance of snow after 1pm. Mostly cloudy, with a high near 41. East wind 9 to 15 mph, with gusts as high as 23 mph. Chance of precipitation is 30%.

    High: 41 °F

    Mostly Cloudy
    then Chance
    Snow

  • Wednesday Night

    Wednesday Night: A chance of snow. Mostly cloudy, with a low around 27. East wind around 15 mph, with gusts as high as 24 mph. Chance of precipitation is 50%.

    Low: 27 °F

    Chance Snow

  • Thursday

    Thursday: A chance of snow. Mostly cloudy, with a high near 42. Breezy, with an east southeast wind 15 to 20 mph, with gusts as high as 29 mph. Chance of precipitation is 40%.

    High: 42 °F

    Chance Snow
    and Breezy

Detailed Forecast

This Afternoon
Sunny, with a high near 70. Light west northwest wind.
Tonight
Mostly clear, with a low around 36. North wind 6 to 10 mph becoming east northeast after midnight.
Monday
Mostly sunny, with a high near 70. East northeast wind 10 to 15 mph becoming west in the afternoon. Winds could gust as high as 24 mph.
Monday Night
A slight chance of rain after 1am. Mostly cloudy, with a low around 35. Breezy, with an east northeast wind 10 to 15 mph increasing to 18 to 23 mph after midnight. Winds could gust as high as 40 mph. Chance of precipitation is 20%.
Tuesday
Mostly cloudy, with a high near 45. Breezy, with a north northwest wind 21 to 24 mph, with gusts as high as 36 mph.
Tuesday Night
Mostly cloudy, with a low around 22. Northeast wind 10 to 16 mph, with gusts as high as 25 mph.
Wednesday
A chance of snow after 1pm. Mostly cloudy, with a high near 41. East wind 9 to 15 mph, with gusts as high as 23 mph. Chance of precipitation is 30%.
Wednesday Night
A chance of snow. Mostly cloudy, with a low around 27. East wind around 15 mph, with gusts as high as 24 mph. Chance of precipitation is 50%.
Thursday
A chance of snow. Mostly cloudy, with a high near 42. Breezy, with an east southeast wind 15 to 20 mph, with gusts as high as 29 mph. Chance of precipitation is 40%.
Thursday Night
A chance of snow. Mostly cloudy, with a low around 29. Breezy. Chance of precipitation is 30%.
Friday
Rain and snow likely. Mostly cloudy, with a high near 46. Breezy. Chance of precipitation is 60%.
Friday Night
Rain and snow likely. Mostly cloudy, with a low around 29. Chance of precipitation is 60%.
Saturday
A chance of rain and snow. Mostly cloudy, with a high near 39. Breezy. Chance of precipitation is 50%.
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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:
2:36 pm CDT Mar 29, 2026
Forecast Valid:
3pm CDT Mar 29, 2026-6pm CDT Apr 4, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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