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

69°F

21°C

Humidity 45%
Wind Speed W 8 mph
Barometer 29.86 in (1011.8 mb)
Dewpoint 47°F (8°C)
Visibility 10.00 mi
Last update 19 Mar 5:53 pm CDT
Extended Forecast for

4 Miles ESE Castlewood SD

  • Tonight

    Tonight: Partly cloudy, with a low around 37. West southwest wind 7 to 10 mph becoming north northwest after midnight. Winds could gust as high as 20 mph.

    Low: 37 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 68. North northwest wind 6 to 11 mph becoming west in the afternoon. Winds could gust as high as 20 mph.

    High: 68 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 41. West wind 6 to 8 mph becoming south after midnight.

    Low: 41 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 77. Southwest wind 9 to 13 mph, with gusts as high as 21 mph.

    High: 77 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 35. North northeast wind 11 to 18 mph, with gusts as high as 28 mph.

    Low: 35 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 45. North northwest wind 16 to 18 mph, with gusts as high as 28 mph.

    High: 45 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 24. North northwest wind 6 to 13 mph becoming northeast after midnight.

    Low: 24 °F

    Mostly Clear

  • Monday

    Monday: Partly sunny, with a high near 49. South wind 6 to 11 mph increasing to 12 to 17 mph in the afternoon. Winds could gust as high as 26 mph.

    High: 49 °F

    Partly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 33. South wind 10 to 14 mph, with gusts as high as 22 mph.

    Low: 33 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Partly cloudy, with a low around 37. West southwest wind 7 to 10 mph becoming north northwest after midnight. Winds could gust as high as 20 mph.
Friday
Mostly sunny, with a high near 68. North northwest wind 6 to 11 mph becoming west in the afternoon. Winds could gust as high as 20 mph.
Friday Night
Partly cloudy, with a low around 41. West wind 6 to 8 mph becoming south after midnight.
Saturday
Mostly sunny, with a high near 77. Southwest wind 9 to 13 mph, with gusts as high as 21 mph.
Saturday Night
Mostly cloudy, with a low around 35. North northeast wind 11 to 18 mph, with gusts as high as 28 mph.
Sunday
Partly sunny, with a high near 45. North northwest wind 16 to 18 mph, with gusts as high as 28 mph.
Sunday Night
Mostly clear, with a low around 24. North northwest wind 6 to 13 mph becoming northeast after midnight.
Monday
Partly sunny, with a high near 49. South wind 6 to 11 mph increasing to 12 to 17 mph in the afternoon. Winds could gust as high as 26 mph.
Monday Night
Mostly cloudy, with a low around 33. South wind 10 to 14 mph, with gusts as high as 22 mph.
Tuesday
Partly sunny, with a high near 52.
Tuesday Night
Mostly cloudy, with a low around 32.
Wednesday
Mostly cloudy, with a high near 62.
Wednesday Night
A slight chance of rain and snow. Mostly cloudy, with a low around 33. Chance of precipitation is 20%.
Thursday
Mostly sunny, with a high near 44. Breezy.
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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:
5:36 pm CDT Mar 19, 2026
Forecast Valid:
5pm CDT Mar 19, 2026-6pm CDT Mar 26, 2026
 
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Additional Resources

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Chance of Precipitation