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

63°F

17°C

Humidity 34%
Wind Speed SE 5 mph
Barometer 29.77 in (1008.3 mb)
Dewpoint 34°F (1°C)
Visibility 10.00 mi
Last update 25 Mar 11:53 am CDT
Extended Forecast for

4 Miles ESE Castlewood SD

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 74. West northwest wind 5 to 9 mph.

    High: 74 °F

    Mostly Sunny

  • Tonight

    Tonight: A slight chance of rain after 1am. Mostly cloudy, with a low around 37. North northwest wind 5 to 13 mph becoming east in the evening. Winds could gust as high as 21 mph. Chance of precipitation is 20%.

    Low: 37 °F

    Partly Cloudy
    then Slight
    Chance Rain

  • Thursday

    Thursday: A slight chance of rain between 1pm and 3pm. Partly sunny, with a temperature falling to around 38 by 9am. Breezy, with a north wind 18 to 22 mph, with gusts as high as 34 mph. Chance of precipitation is 20%.

    High: 43 °F⇓

    Breezy.
    Partly Sunny
    then Slight
    Chance Rain

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 18. North wind 10 to 16 mph, with gusts as high as 25 mph.

    Low: 18 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 39. North northwest wind 11 to 14 mph, with gusts as high as 23 mph.

    High: 39 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 25. West northwest wind 6 to 13 mph becoming south after midnight. Winds could gust as high as 21 mph.

    Low: 25 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 57. South wind 14 to 18 mph, with gusts as high as 26 mph.

    High: 57 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 35. South southeast wind around 11 mph.

    Low: 35 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 69. South wind 11 to 15 mph, with gusts as high as 24 mph.

    High: 69 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 74. West northwest wind 5 to 9 mph.
Tonight
A slight chance of rain after 1am. Mostly cloudy, with a low around 37. North northwest wind 5 to 13 mph becoming east in the evening. Winds could gust as high as 21 mph. Chance of precipitation is 20%.
Thursday
A slight chance of rain between 1pm and 3pm. Partly sunny, with a temperature falling to around 38 by 9am. Breezy, with a north wind 18 to 22 mph, with gusts as high as 34 mph. Chance of precipitation is 20%.
Thursday Night
Partly cloudy, with a low around 18. North wind 10 to 16 mph, with gusts as high as 25 mph.
Friday
Sunny, with a high near 39. North northwest wind 11 to 14 mph, with gusts as high as 23 mph.
Friday Night
Mostly clear, with a low around 25. West northwest wind 6 to 13 mph becoming south after midnight. Winds could gust as high as 21 mph.
Saturday
Mostly sunny, with a high near 57. South wind 14 to 18 mph, with gusts as high as 26 mph.
Saturday Night
Partly cloudy, with a low around 35. South southeast wind around 11 mph.
Sunday
Mostly sunny, with a high near 69. South wind 11 to 15 mph, with gusts as high as 24 mph.
Sunday Night
Partly cloudy, with a low around 40.
Monday
Partly sunny, with a high near 69.
Monday Night
Partly cloudy, with a low around 44.
Tuesday
A slight chance of rain. Mostly cloudy, with a high near 68. Chance of precipitation is 20%.
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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:
11:46 am CDT Mar 25, 2026
Forecast Valid:
12pm CDT Mar 25, 2026-6pm CDT Mar 31, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation