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.

Overcast

41°F

5°C

Humidity 62%
Wind Speed NE 15 mph
Barometer 30.10 in (1020.0 mb)
Dewpoint 29°F (-2°C)
Visibility 10.00 mi
Wind Chill33°F (1°C)
Last update 29 Apr 11:53 pm CDT
Extended Forecast for

4 Miles ESE Castlewood SD

  • Tonight

    Tonight: A slight chance of showers before 1am. Mostly cloudy, with a low around 31. Northeast wind 6 to 8 mph. Chance of precipitation is 20%.

    Low: 31 °F

    Slight Chance
    Showers

  • Thursday

    Thursday: A chance of showers, mainly after 4pm. Increasing clouds, with a high near 51. North wind 5 to 15 mph. Chance of precipitation is 30%.

    High: 51 °F

    Mostly Sunny
    then Chance
    Showers

  • Thursday Night

    Thursday Night: A chance of showers before 7pm. Partly cloudy, with a low around 29. North wind 5 to 10 mph. Chance of precipitation is 30%.

    Low: 29 °F

    Chance
    Showers then
    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 50. North wind 5 to 11 mph, with gusts as high as 20 mph.

    High: 50 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 31. North wind 5 to 9 mph becoming calm.

    Low: 31 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 64. West southwest wind 6 to 13 mph.

    High: 64 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A slight chance of showers. Partly cloudy, with a low around 41. Southwest wind around 9 mph. Chance of precipitation is 20%.

    Low: 41 °F

    Slight Chance
    Showers

  • Sunday

    Sunday: Mostly sunny, with a high near 62. North northwest wind 9 to 17 mph, with gusts as high as 26 mph.

    High: 62 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 38. West wind 5 to 14 mph, with gusts as high as 22 mph.

    Low: 38 °F

    Partly Cloudy

Detailed Forecast

Tonight
A slight chance of showers before 1am. Mostly cloudy, with a low around 31. Northeast wind 6 to 8 mph. Chance of precipitation is 20%.
Thursday
A chance of showers, mainly after 4pm. Increasing clouds, with a high near 51. North wind 5 to 15 mph. Chance of precipitation is 30%.
Thursday Night
A chance of showers before 7pm. Partly cloudy, with a low around 29. North wind 5 to 10 mph. Chance of precipitation is 30%.
Friday
Mostly sunny, with a high near 50. North wind 5 to 11 mph, with gusts as high as 20 mph.
Friday Night
Mostly clear, with a low around 31. North wind 5 to 9 mph becoming calm.
Saturday
Mostly sunny, with a high near 64. West southwest wind 6 to 13 mph.
Saturday Night
A slight chance of showers. Partly cloudy, with a low around 41. Southwest wind around 9 mph. Chance of precipitation is 20%.
Sunday
Mostly sunny, with a high near 62. North northwest wind 9 to 17 mph, with gusts as high as 26 mph.
Sunday Night
Partly cloudy, with a low around 38. West wind 5 to 14 mph, with gusts as high as 22 mph.
Monday
Mostly sunny, with a high near 61. Breezy.
Monday Night
Partly cloudy, with a low around 37.
Tuesday
Mostly sunny, with a high near 64.
Tuesday Night
Partly cloudy, with a low around 37.
Wednesday
A slight chance of showers. Mostly sunny, with a high near 56. Breezy. Chance of precipitation is 20%.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles ESE Castlewood SD
 44.72°N 96.96°W (Elev. 1749 ft)
Last Update:
11:46 pm CDT Apr 29, 2026
Forecast Valid:
11pm CDT Apr 29, 2026-6pm CDT May 6, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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