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

61°F

16°C

Humidity 90%
Wind Speed Calm
Barometer 29.84 in (1009.7 mb)
Dewpoint 58°F (14°C)
Visibility 10.00 mi
Last update 18 Jun 1:53 am CDT
Extended Forecast for

Castlewood SD

  • Overnight

    Overnight: Mostly cloudy, with a low around 58. Calm wind.

    Low: 58 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A chance of showers, mainly before noon. Cloudy, then gradually becoming mostly sunny, with a high near 78. Light and variable wind becoming northwest 5 to 10 mph in the morning. Chance of precipitation is 30%.

    High: 78 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 56. Northwest wind 5 to 8 mph becoming light and variable.

    Low: 56 °F

    Mostly Clear

  • Juneteenth

    Juneteenth: Sunny, with a high near 88. Southwest wind 7 to 14 mph, with gusts as high as 22 mph.

    High: 88 °F

    Sunny

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 65. South wind 10 to 13 mph, with gusts as high as 23 mph. Chance of precipitation is 40%.

    Low: 65 °F

    Chance
    T-storms

  • Friday

    Friday: A slight chance of thunderstorms before 7am. Sunny and hot, with a high near 92. South wind 11 to 18 mph, with gusts as high as 29 mph. Chance of precipitation is 10%.

    High: 92 °F

    Slight Chance
    T-storms then
    Sunny

  • Friday Night

    Friday Night: A slight chance of showers before 10pm, then a slight chance of showers and thunderstorms between 10pm and 1am. Mostly clear, with a low around 69. South wind 10 to 16 mph, with gusts as high as 28 mph. Chance of precipitation is 20%.

    Low: 69 °F

    Slight Chance
    T-storms

  • Saturday

    Saturday: Sunny and hot, with a high near 95. South wind 10 to 17 mph, with gusts as high as 28 mph.

    High: 95 °F

    Hot

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 75. South wind 14 to 18 mph, with gusts as high as 31 mph.

    Low: 75 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly cloudy, with a low around 58. Calm wind.
Wednesday
A chance of showers, mainly before noon. Cloudy, then gradually becoming mostly sunny, with a high near 78. Light and variable wind becoming northwest 5 to 10 mph in the morning. Chance of precipitation is 30%.
Wednesday Night
Mostly clear, with a low around 56. Northwest wind 5 to 8 mph becoming light and variable.
Juneteenth
Sunny, with a high near 88. Southwest wind 7 to 14 mph, with gusts as high as 22 mph.
Thursday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 65. South wind 10 to 13 mph, with gusts as high as 23 mph. Chance of precipitation is 40%.
Friday
A slight chance of thunderstorms before 7am. Sunny and hot, with a high near 92. South wind 11 to 18 mph, with gusts as high as 29 mph. Chance of precipitation is 10%.
Friday Night
A slight chance of showers before 10pm, then a slight chance of showers and thunderstorms between 10pm and 1am. Mostly clear, with a low around 69. South wind 10 to 16 mph, with gusts as high as 28 mph. Chance of precipitation is 20%.
Saturday
Sunny and hot, with a high near 95. South wind 10 to 17 mph, with gusts as high as 28 mph.
Saturday Night
Mostly clear, with a low around 75. South wind 14 to 18 mph, with gusts as high as 31 mph.
Sunday
Sunny and hot, with a high near 92. Breezy.
Sunday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 60. Chance of precipitation is 50%.
Monday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 72. Chance of precipitation is 60%.
Monday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 53. Chance of precipitation is 50%.
Tuesday
A chance of showers and thunderstorms. Mostly cloudy, with a high near 68. Chance of precipitation is 40%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Castlewood SD
 44.72°N 97.02°W (Elev. 1683 ft)
Last Update:
2:30 am CDT Jun 18, 2025
Forecast Valid:
2am CDT Jun 18, 2025-6pm CDT Jun 24, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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