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

51°F

11°C

Humidity 74%
Wind Speed Calm
Barometer 30.07 in (1018.2 mb)
Dewpoint 43°F (6°C)
Visibility 10.00 mi
Last update 7 Oct 11:53 pm CDT
Extended Forecast for

4 Miles WSW Castlewood SD

  • Overnight

    Overnight: Isolated sprinkles after 4am. Mostly cloudy, with a low around 48. Light north wind.

    Low: 48 °F

    Isolated
    Sprinkles

  • Thursday

    Thursday: Isolated sprinkles before 8am. Mostly cloudy, then gradually becoming sunny, with a high near 68. Calm wind becoming south southeast 5 to 7 mph in the afternoon.

    High: 68 °F

    Isolated
    Sprinkles

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 48. East southeast wind 6 to 8 mph.

    Low: 48 °F

    Partly Cloudy

  • Friday

    Friday: Partly sunny, then gradually becoming sunny, with a high near 77. Southeast wind 9 to 16 mph, with gusts as high as 25 mph.

    High: 77 °F

    Becoming
    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 65. Breezy, with a south wind 15 to 20 mph, with gusts as high as 32 mph.

    Low: 65 °F

    Mostly Clear
    then Mostly
    Clear and
    Breezy

  • Saturday

    Saturday: Sunny, with a high near 82. Breezy, with a south wind 22 to 25 mph, with gusts as high as 38 mph.

    High: 82 °F

    Sunny and
    Breezy

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 62. Breezy, with a south wind 17 to 21 mph, with gusts as high as 32 mph.

    Low: 62 °F

    Clear and
    Breezy then
    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 73. South wind around 16 mph becoming north in the afternoon. Winds could gust as high as 25 mph.

    High: 73 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 46. North wind 11 to 14 mph, with gusts as high as 23 mph.

    Low: 46 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Isolated sprinkles after 4am. Mostly cloudy, with a low around 48. Light north wind.
Thursday
Isolated sprinkles before 8am. Mostly cloudy, then gradually becoming sunny, with a high near 68. Calm wind becoming south southeast 5 to 7 mph in the afternoon.
Thursday Night
Partly cloudy, with a low around 48. East southeast wind 6 to 8 mph.
Friday
Partly sunny, then gradually becoming sunny, with a high near 77. Southeast wind 9 to 16 mph, with gusts as high as 25 mph.
Friday Night
Mostly clear, with a low around 65. Breezy, with a south wind 15 to 20 mph, with gusts as high as 32 mph.
Saturday
Sunny, with a high near 82. Breezy, with a south wind 22 to 25 mph, with gusts as high as 38 mph.
Saturday Night
Mostly clear, with a low around 62. Breezy, with a south wind 17 to 21 mph, with gusts as high as 32 mph.
Sunday
Mostly sunny, with a high near 73. South wind around 16 mph becoming north in the afternoon. Winds could gust as high as 25 mph.
Sunday Night
Mostly cloudy, with a low around 46. North wind 11 to 14 mph, with gusts as high as 23 mph.
Columbus Day
A chance of showers, mainly before 1pm. Mostly cloudy, with a high near 53. Chance of precipitation is 40%.
Monday Night
Mostly cloudy, with a low around 38.
Tuesday
Partly sunny, with a high near 55.
Tuesday Night
A slight chance of showers. Partly cloudy, with a low around 39. Chance of precipitation is 20%.
Wednesday
A chance of showers. Mostly sunny, with a high near 58. Chance of precipitation is 30%.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles WSW Castlewood SD
 44.69°N 97.11°W (Elev. 1781 ft)
Last Update:
12:16 am CDT Oct 8, 2026
Forecast Valid:
12am CDT Oct 8, 2026-6pm CDT Oct 14, 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