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

56°F

13°C

Humidity 90%
Wind Speed W 6 mph
Barometer 30.02 in (1016.1 mb)
Dewpoint 53°F (12°C)
Visibility 10.00 mi
Last update 25 Jun 3:53 am CDT
Extended Forecast for

Castlewood SD

  • Today

    Today: Increasing clouds, with a high near 76. Light and variable wind becoming north northwest 5 to 7 mph.

    High: 76 °F

    Increasing
    Clouds

  • Tonight

    Tonight: Mostly cloudy, with a low around 56. East wind 3 to 7 mph.

    Low: 56 °F

    Mostly Cloudy

  • Friday

    Friday: A slight chance of showers between 8am and 10am. Partly sunny, with a high near 80. Southeast wind 7 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 20%.

    High: 80 °F

    Slight Chance
    Showers then
    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 63. Southeast wind 13 to 15 mph, with gusts as high as 25 mph.

    Low: 63 °F

    Partly Cloudy

  • Saturday

    Saturday: A slight chance of showers between 1pm and 4pm, then a slight chance of showers and thunderstorms after 4pm. Partly sunny, with a high near 84. Breezy, with a south southeast wind 16 to 25 mph, with gusts as high as 34 mph. Chance of precipitation is 20%.

    High: 84 °F

    Breezy.
    Partly Sunny
    then Slight
    Chance
    T-storms

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 70. Breezy, with a southeast wind 17 to 22 mph, with gusts as high as 32 mph. Chance of precipitation is 50%.

    Low: 70 °F

    Chance
    Showers and
    Breezy then
    Chance
    T-storms

  • Sunday

    Sunday: A slight chance of showers and thunderstorms before 1pm. Mostly sunny and hot, with a high near 96. Breezy, with a southeast wind 17 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 20%.

    High: 96 °F

    Slight Chance
    T-storms and
    Breezy

  • Sunday Night

    Sunday Night: A slight chance of showers and thunderstorms after 1am. Mostly clear, with a low around 71. South wind 8 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.

    Low: 71 °F

    Clear then
    Slight Chance
    T-storms

  • Monday

    Monday: Sunny and hot, with a high near 94. South southeast wind 13 to 17 mph becoming southwest in the afternoon. Winds could gust as high as 28 mph.

    High: 94 °F

    Hot

Detailed Forecast

Today
Increasing clouds, with a high near 76. Light and variable wind becoming north northwest 5 to 7 mph.
Tonight
Mostly cloudy, with a low around 56. East wind 3 to 7 mph.
Friday
A slight chance of showers between 8am and 10am. Partly sunny, with a high near 80. Southeast wind 7 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 20%.
Friday Night
Partly cloudy, with a low around 63. Southeast wind 13 to 15 mph, with gusts as high as 25 mph.
Saturday
A slight chance of showers between 1pm and 4pm, then a slight chance of showers and thunderstorms after 4pm. Partly sunny, with a high near 84. Breezy, with a south southeast wind 16 to 25 mph, with gusts as high as 34 mph. Chance of precipitation is 20%.
Saturday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 70. Breezy, with a southeast wind 17 to 22 mph, with gusts as high as 32 mph. Chance of precipitation is 50%.
Sunday
A slight chance of showers and thunderstorms before 1pm. Mostly sunny and hot, with a high near 96. Breezy, with a southeast wind 17 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 20%.
Sunday Night
A slight chance of showers and thunderstorms after 1am. Mostly clear, with a low around 71. South wind 8 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Monday
Sunny and hot, with a high near 94. South southeast wind 13 to 17 mph becoming southwest in the afternoon. Winds could gust as high as 28 mph.
Monday Night
A slight chance of showers and thunderstorms. Mostly clear, with a low around 66. Chance of precipitation is 20%.
Tuesday
A slight chance of showers and thunderstorms. Mostly sunny and hot, with a high near 92. Chance of precipitation is 20%.
Tuesday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 66. Chance of precipitation is 20%.
Wednesday
A slight chance of showers and thunderstorms. Mostly sunny and hot, with a high near 95. Chance of precipitation is 20%.
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ABOUT THIS FORECAST

 
Point Forecast:
Castlewood SD
 44.72°N 97.02°W (Elev. 1683 ft)
Last Update:
3:36 am CDT Jun 25, 2026
Forecast Valid:
4am CDT Jun 25, 2026-6pm CDT Jul 1, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation