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

46°F

8°C

Humidity 56%
Wind Speed SE 8 mph
Barometer 29.95 in (1015.6 mb)
Dewpoint 31°F (-1°C)
Visibility 10.00 mi
Wind Chill42°F (6°C)
Last update 24 Mar 8:53 pm CDT
Extended Forecast for

7 Miles N Castlewood SD

  • Tonight

    Tonight: Partly cloudy, with a low around 36. South wind 5 to 9 mph.

    Low: 36 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 72. South wind 6 to 11 mph becoming west northwest in the afternoon.

    High: 72 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A slight chance of rain after 1am. Mostly cloudy, with a low around 37. West wind 5 to 11 mph becoming east northeast after midnight. Winds could gust as high as 21 mph. Chance of precipitation is 20%.

    Low: 37 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Thursday

    Thursday: Partly sunny, with a high near 45. Breezy, with a north wind 16 to 22 mph, with gusts as high as 32 mph.

    High: 45 °F

    Partly Sunny
    and Breezy

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 16. North wind 8 to 18 mph, with gusts as high as 26 mph.

    Low: 16 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 42. West northwest wind 6 to 11 mph, with gusts as high as 20 mph.

    High: 42 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 26. West northwest wind 7 to 10 mph becoming south southwest after midnight.

    Low: 26 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 58. South southwest wind 11 to 15 mph, with gusts as high as 23 mph.

    High: 58 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 34. Southeast wind around 11 mph, with gusts as high as 20 mph.

    Low: 34 °F

    Partly Cloudy

Detailed Forecast

Tonight
Partly cloudy, with a low around 36. South wind 5 to 9 mph.
Wednesday
Mostly sunny, with a high near 72. South wind 6 to 11 mph becoming west northwest in the afternoon.
Wednesday Night
A slight chance of rain after 1am. Mostly cloudy, with a low around 37. West wind 5 to 11 mph becoming east northeast after midnight. Winds could gust as high as 21 mph. Chance of precipitation is 20%.
Thursday
Partly sunny, with a high near 45. Breezy, with a north wind 16 to 22 mph, with gusts as high as 32 mph.
Thursday Night
Partly cloudy, with a low around 16. North wind 8 to 18 mph, with gusts as high as 26 mph.
Friday
Sunny, with a high near 42. West northwest wind 6 to 11 mph, with gusts as high as 20 mph.
Friday Night
Mostly clear, with a low around 26. West northwest wind 7 to 10 mph becoming south southwest after midnight.
Saturday
Mostly sunny, with a high near 58. South southwest wind 11 to 15 mph, with gusts as high as 23 mph.
Saturday Night
Partly cloudy, with a low around 34. Southeast wind around 11 mph, with gusts as high as 20 mph.
Sunday
Mostly sunny, with a high near 66.
Sunday Night
Mostly clear, with a low around 38.
Monday
Partly sunny, with a high near 66.
Monday Night
Partly cloudy, with a low around 39.
Tuesday
A slight chance of rain. Partly sunny, with a high near 61. Breezy. Chance of precipitation is 20%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
7 Miles N Castlewood SD
 44.82°N 97.05°W (Elev. 1709 ft)
Last Update:
8:36 pm CDT Mar 24, 2026
Forecast Valid:
9pm CDT Mar 24, 2026-6pm CDT Mar 31, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation