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

59°F

15°C

Humidity 67%
Wind Speed NW 6 mph
Barometer 30.02 in (1016.2 mb)
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Last update 19 Jun 10:53 pm CDT
Extended Forecast for

6 Miles ESE Castlewood SD

  • Tonight

    Tonight: Mostly clear, with a low around 48. West northwest wind around 5 mph becoming calm after midnight.

    Low: 48 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 76. Calm wind becoming north northwest around 5 mph in the afternoon.

    High: 76 °F

    Sunny

  • Saturday Night

    Saturday Night: Increasing clouds, with a low around 55. East wind 7 to 13 mph, with gusts as high as 21 mph.

    Low: 55 °F

    Increasing
    Clouds

  • Sunday

    Sunday: A chance of showers, mainly after 7am. Cloudy, with a high near 69. East wind 13 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 50%.

    High: 69 °F

    Chance
    Showers

  • Sunday Night

    Sunday Night: A slight chance of showers before 1am. Mostly cloudy, with a low around 52. Northeast wind 6 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.

    Low: 52 °F

    Slight Chance
    Showers

  • Monday

    Monday: Partly sunny, with a high near 73. Northeast wind around 6 mph becoming southeast in the afternoon.

    High: 73 °F

    Partly Sunny

  • Monday Night

    Monday Night: A slight chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 54. Southeast wind 3 to 6 mph. Chance of precipitation is 60%.

    Low: 54 °F

    Slight Chance
    T-storms then
    Showers
    Likely

  • Tuesday

    Tuesday: A chance of showers and thunderstorms. Partly sunny, with a high near 73. Southwest wind 8 to 16 mph becoming west northwest in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 50%.

    High: 73 °F

    Chance
    Showers then
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A slight chance of showers and thunderstorms before 1am. Mostly clear, with a low around 51. Northwest wind 6 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 20%.

    Low: 51 °F

    Slight Chance
    T-storms

Detailed Forecast

Tonight
Mostly clear, with a low around 48. West northwest wind around 5 mph becoming calm after midnight.
Saturday
Sunny, with a high near 76. Calm wind becoming north northwest around 5 mph in the afternoon.
Saturday Night
Increasing clouds, with a low around 55. East wind 7 to 13 mph, with gusts as high as 21 mph.
Sunday
A chance of showers, mainly after 7am. Cloudy, with a high near 69. East wind 13 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 50%.
Sunday Night
A slight chance of showers before 1am. Mostly cloudy, with a low around 52. Northeast wind 6 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Monday
Partly sunny, with a high near 73. Northeast wind around 6 mph becoming southeast in the afternoon.
Monday Night
A slight chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 54. Southeast wind 3 to 6 mph. Chance of precipitation is 60%.
Tuesday
A chance of showers and thunderstorms. Partly sunny, with a high near 73. Southwest wind 8 to 16 mph becoming west northwest in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 50%.
Tuesday Night
A slight chance of showers and thunderstorms before 1am. Mostly clear, with a low around 51. Northwest wind 6 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 20%.
Wednesday
Mostly sunny, with a high near 73.
Wednesday Night
Partly cloudy, with a low around 51.
Thursday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 76. Chance of precipitation is 20%.
Thursday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 54. Chance of precipitation is 20%.
Friday
A chance of showers and thunderstorms. Mostly sunny, with a high near 78. Chance of precipitation is 30%.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
6 Miles ESE Castlewood SD
 44.7°N 96.93°W (Elev. 1703 ft)
Last Update:
11:36 pm CDT Jun 19, 2026
Forecast Valid:
11pm CDT Jun 19, 2026-6pm CDT Jun 26, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation