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

62°F

17°C

Humidity 40%
Wind Speed SE 15 G 26 mph
Barometer 30.15 in (1021.5 mb)
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Last update 5 Oct 10:53 am CDT
Extended Forecast for

Castlewood SD

  • Today

    Today: Sunny, with a high near 73. Breezy, with a south southeast wind 16 to 22 mph, with gusts as high as 33 mph.

    High: 73 °F

    Sunny and
    Breezy

  • Tonight

    Tonight: Mostly clear, with a low around 53. Breezy, with a south wind 10 to 20 mph, with gusts as high as 32 mph.

    Low: 53 °F

    Mostly Clear
    and Breezy
    then Mostly
    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 77. South southwest wind 6 to 11 mph becoming west northwest in the afternoon. Winds could gust as high as 20 mph.

    High: 77 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 49. North northwest wind around 6 mph.

    Low: 49 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 70. Northwest wind 6 to 11 mph, with gusts as high as 20 mph.

    High: 70 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 47. Northwest wind 3 to 5 mph.

    Low: 47 °F

    Partly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 67. Light and variable wind becoming west 5 to 8 mph in the morning.

    High: 67 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 46. East wind 3 to 5 mph.

    Low: 46 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 68. Southeast wind 5 to 10 mph.

    High: 68 °F

    Mostly Sunny

Detailed Forecast

Today
Sunny, with a high near 73. Breezy, with a south southeast wind 16 to 22 mph, with gusts as high as 33 mph.
Tonight
Mostly clear, with a low around 53. Breezy, with a south wind 10 to 20 mph, with gusts as high as 32 mph.
Tuesday
Sunny, with a high near 77. South southwest wind 6 to 11 mph becoming west northwest in the afternoon. Winds could gust as high as 20 mph.
Tuesday Night
Mostly clear, with a low around 49. North northwest wind around 6 mph.
Wednesday
Sunny, with a high near 70. Northwest wind 6 to 11 mph, with gusts as high as 20 mph.
Wednesday Night
Partly cloudy, with a low around 47. Northwest wind 3 to 5 mph.
Thursday
Partly sunny, with a high near 67. Light and variable wind becoming west 5 to 8 mph in the morning.
Thursday Night
Mostly cloudy, with a low around 46. East wind 3 to 5 mph.
Friday
Mostly sunny, with a high near 68. Southeast wind 5 to 10 mph.
Friday Night
Partly cloudy, with a low around 54.
Saturday
Mostly sunny, with a high near 75. Breezy.
Saturday Night
Partly cloudy, with a low around 56. Breezy.
Sunday
Mostly sunny, with a high near 66. Breezy.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Castlewood SD
 44.72°N 97.02°W (Elev. 1683 ft)
Last Update:
11:21 am CDT Oct 5, 2026
Forecast Valid:
11am CDT Oct 5, 2026-6pm CDT Oct 11, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation