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.

Fog

51°F

11°C

Humidity 96%
Wind Speed NE 10 mph
Barometer 29.71 in (1005.7 mb)
Dewpoint 50°F (10°C)
Visibility 0.25 mi
Wind Chill47°F (8°C)
Last update 13 Apr 2:53 am CDT
Extended Forecast for

4 Miles ESE Castlewood SD

  • Overnight

    Overnight: Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 46. Northeast wind around 7 mph.

    Low: 46 °F

    Patchy Fog

  • Monday

    Monday: A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Areas of fog before 11am. Otherwise, partly sunny, with a high near 70. East wind 10 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 50%.

    High: 70 °F

    Slight Chance
    Showers and
    Areas Fog
    then Chance
    T-storms

  • Monday Night

    Monday Night: A chance of showers and thunderstorms before 9pm, then a slight chance of showers between 9pm and 10pm. Partly cloudy, with a low around 42. Northeast wind 6 to 11 mph becoming north northwest after midnight. Chance of precipitation is 30%.

    Low: 42 °F

    Chance
    T-storms then
    Partly Cloudy

  • Tuesday

    Tuesday: A slight chance of showers after 1pm. Partly sunny, with a high near 63. Northwest wind 6 to 10 mph. Chance of precipitation is 20%.

    High: 63 °F

    Partly Sunny
    then Slight
    Chance
    Showers

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 41. North wind 6 to 8 mph becoming east after midnight.

    Low: 41 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A chance of showers, mainly after 1pm. Partly sunny, with a high near 67. East wind 6 to 10 mph. Chance of precipitation is 40%.

    High: 67 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: A chance of showers before 1am. Partly cloudy, with a low around 44. East northeast wind 7 to 9 mph becoming south southwest after midnight. Chance of precipitation is 30%.

    Low: 44 °F

    Chance
    Showers

  • Thursday

    Thursday: Sunny, with a high near 75. South wind 9 to 16 mph, with gusts as high as 25 mph.

    High: 75 °F

    Sunny

  • Thursday Night

    Thursday Night: A slight chance of showers after 1am. Partly cloudy, with a low around 45. South southeast wind 13 to 17 mph, with gusts as high as 28 mph. Chance of precipitation is 20%.

    Low: 45 °F

    Mostly Clear
    then Slight
    Chance
    Showers

Detailed Forecast

Overnight
Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 46. Northeast wind around 7 mph.
Monday
A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Areas of fog before 11am. Otherwise, partly sunny, with a high near 70. East wind 10 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 50%.
Monday Night
A chance of showers and thunderstorms before 9pm, then a slight chance of showers between 9pm and 10pm. Partly cloudy, with a low around 42. Northeast wind 6 to 11 mph becoming north northwest after midnight. Chance of precipitation is 30%.
Tuesday
A slight chance of showers after 1pm. Partly sunny, with a high near 63. Northwest wind 6 to 10 mph. Chance of precipitation is 20%.
Tuesday Night
Mostly cloudy, with a low around 41. North wind 6 to 8 mph becoming east after midnight.
Wednesday
A chance of showers, mainly after 1pm. Partly sunny, with a high near 67. East wind 6 to 10 mph. Chance of precipitation is 40%.
Wednesday Night
A chance of showers before 1am. Partly cloudy, with a low around 44. East northeast wind 7 to 9 mph becoming south southwest after midnight. Chance of precipitation is 30%.
Thursday
Sunny, with a high near 75. South wind 9 to 16 mph, with gusts as high as 25 mph.
Thursday Night
A slight chance of showers after 1am. Partly cloudy, with a low around 45. South southeast wind 13 to 17 mph, with gusts as high as 28 mph. Chance of precipitation is 20%.
Friday
A chance of showers. Mostly cloudy, with a high near 57. Breezy. Chance of precipitation is 40%.
Friday Night
A slight chance of rain and snow showers. Mostly cloudy, with a low around 25. Blustery. Chance of precipitation is 20%.
Saturday
A slight chance of snow showers. Partly sunny, with a high near 44. Breezy. Chance of precipitation is 20%.
Saturday Night
Partly cloudy, with a low around 24.
Sunday
Sunny, with a high near 55.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles ESE Castlewood SD
 44.72°N 96.96°W (Elev. 1749 ft)
Last Update:
2:36 am CDT Apr 13, 2026
Forecast Valid:
3am CDT Apr 13, 2026-6pm CDT Apr 19, 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