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.

Overcast and Breezy

31°F

-1°C

Humidity 89%
Wind Speed N 21 G 28 mph
Barometer 30.00 in (1016.5 mb)
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Wind Chill18°F (-8°C)
Last update 22 Mar 5:53 am CDT
Extended Forecast for

4 Miles ESE Castlewood SD

  • Today

    Today: Cloudy through mid morning, then gradual clearing, with a high near 43. North wind 13 to 16 mph, with gusts as high as 30 mph.

    High: 43 °F

    Gradual
    Clearing

  • Tonight

    Tonight: Mostly clear, with a low around 25. North northwest wind 5 to 9 mph becoming light and variable.

    Low: 25 °F

    Mostly Clear

  • Monday

    Monday: A slight chance of rain after 1pm. Partly sunny, with a high near 50. South southeast wind 6 to 16 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.

    High: 50 °F

    Mostly Sunny
    then Slight
    Chance Rain

  • Monday Night

    Monday Night: Partly cloudy, with a low around 33. South southwest wind 11 to 14 mph, with gusts as high as 24 mph.

    Low: 33 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 53. South wind 10 to 13 mph becoming east in the afternoon.

    High: 53 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 35. East northeast wind around 11 mph.

    Low: 35 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 63. East northeast wind around 11 mph becoming southwest in the afternoon.

    High: 63 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: A slight chance of rain after 1am. Mostly cloudy, with a low around 34. Southwest wind 9 to 14 mph becoming north after midnight. Chance of precipitation is 20%.

    Low: 34 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Thursday

    Thursday: Mostly sunny, with a high near 46. Breezy, with a north wind 15 to 21 mph, with gusts as high as 31 mph.

    High: 46 °F

    Mostly Sunny
    and Breezy

Detailed Forecast

Today
Cloudy through mid morning, then gradual clearing, with a high near 43. North wind 13 to 16 mph, with gusts as high as 30 mph.
Tonight
Mostly clear, with a low around 25. North northwest wind 5 to 9 mph becoming light and variable.
Monday
A slight chance of rain after 1pm. Partly sunny, with a high near 50. South southeast wind 6 to 16 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.
Monday Night
Partly cloudy, with a low around 33. South southwest wind 11 to 14 mph, with gusts as high as 24 mph.
Tuesday
Mostly cloudy, with a high near 53. South wind 10 to 13 mph becoming east in the afternoon.
Tuesday Night
Mostly cloudy, with a low around 35. East northeast wind around 11 mph.
Wednesday
Partly sunny, with a high near 63. East northeast wind around 11 mph becoming southwest in the afternoon.
Wednesday Night
A slight chance of rain after 1am. Mostly cloudy, with a low around 34. Southwest wind 9 to 14 mph becoming north after midnight. Chance of precipitation is 20%.
Thursday
Mostly sunny, with a high near 46. Breezy, with a north wind 15 to 21 mph, with gusts as high as 31 mph.
Thursday Night
Partly cloudy, with a low around 17.
Friday
Mostly sunny, with a high near 42.
Friday Night
Mostly clear, with a low around 24.
Saturday
Mostly sunny, with a high near 51.
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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:
5:56 am CDT Mar 22, 2026
Forecast Valid:
6am CDT Mar 22, 2026-6pm CDT Mar 28, 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