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

43°F

6°C

Humidity 89%
Wind Speed SE 5 mph
Barometer 29.77 in (1008.3 mb)
Dewpoint 40°F (4°C)
Visibility 10.00 mi
Wind Chill40°F (4°C)
Last update 21 Mar 3:53 am CDT
Extended Forecast for

4 Miles ESE Castlewood SD

  • Today

    Today: Sunny, with a high near 78. South wind 6 to 11 mph becoming west northwest in the morning.

    High: 78 °F

    Sunny

  • Tonight

    Tonight: A slight chance of rain between 1am and 3am. Increasing clouds, with a low around 32. Breezy, with a north northeast wind 9 to 14 mph increasing to 16 to 21 mph in the evening. Winds could gust as high as 32 mph. Chance of precipitation is 20%.

    Low: 32 °F

    Breezy.
    Partly Cloudy
    then Slight
    Chance Rain

  • Sunday

    Sunday: Mostly cloudy, then gradually becoming sunny, with a high near 43. North wind 13 to 17 mph, with gusts as high as 26 mph.

    High: 43 °F

    Decreasing
    Clouds

  • Sunday Night

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

    Low: 25 °F

    Mostly Clear

  • Monday

    Monday: A slight chance of rain after 1pm. Partly sunny, with a high near 51. South wind 6 to 16 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.

    High: 51 °F

    Mostly Sunny
    then Slight
    Chance Rain

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 36. South wind around 14 mph, with gusts as high as 24 mph.

    Low: 36 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 56. South wind 10 to 14 mph becoming east in the afternoon. Winds could gust as high as 22 mph.

    High: 56 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 35. East wind around 11 mph, with gusts as high as 20 mph.

    Low: 35 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 62. East southeast wind 10 to 15 mph becoming west southwest in the afternoon. Winds could gust as high as 23 mph.

    High: 62 °F

    Partly Sunny

Detailed Forecast

Today
Sunny, with a high near 78. South wind 6 to 11 mph becoming west northwest in the morning.
Tonight
A slight chance of rain between 1am and 3am. Increasing clouds, with a low around 32. Breezy, with a north northeast wind 9 to 14 mph increasing to 16 to 21 mph in the evening. Winds could gust as high as 32 mph. Chance of precipitation is 20%.
Sunday
Mostly cloudy, then gradually becoming sunny, with a high near 43. North wind 13 to 17 mph, with gusts as high as 26 mph.
Sunday Night
Mostly clear, with a low around 25. North northwest wind 5 to 9 mph becoming east southeast after midnight.
Monday
A slight chance of rain after 1pm. Partly sunny, with a high near 51. South wind 6 to 16 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.
Monday Night
Mostly cloudy, with a low around 36. South wind around 14 mph, with gusts as high as 24 mph.
Tuesday
Mostly cloudy, with a high near 56. South wind 10 to 14 mph becoming east in the afternoon. Winds could gust as high as 22 mph.
Tuesday Night
Mostly cloudy, with a low around 35. East wind around 11 mph, with gusts as high as 20 mph.
Wednesday
Partly sunny, with a high near 62. East southeast wind 10 to 15 mph becoming west southwest in the afternoon. Winds could gust as high as 23 mph.
Wednesday Night
A slight chance of rain after 1am. Mostly cloudy, with a low around 35. Chance of precipitation is 20%.
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.
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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:
4:36 am CDT Mar 21, 2026
Forecast Valid:
4am CDT Mar 21, 2026-6pm CDT Mar 27, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation