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.

Mostly Cloudy

37°F

3°C

Humidity 76%
Wind Speed NW 12 mph
Barometer 30.32 in (1028.4 mb)
Dewpoint 30°F (-1°C)
Visibility 10.00 mi
Wind Chill29°F (-2°C)
Last update 5 Apr 8:53 pm CDT
Extended Forecast for

4 Miles ESE Castlewood SD

  • Tonight

    Tonight: Mostly cloudy, with a low around 23. North wind 10 to 16 mph, with gusts as high as 26 mph.

    Low: 23 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly cloudy, then gradually becoming sunny, with a high near 31. North wind 10 to 14 mph, with gusts as high as 22 mph.

    High: 31 °F

    Decreasing
    Clouds

  • Monday Night

    Monday Night: Partly cloudy, with a low around 14. North wind 6 to 13 mph becoming east after midnight.

    Low: 14 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 36. Breezy, with a south southeast wind 10 to 20 mph, with gusts as high as 30 mph.

    High: 36 °F

    Partly Sunny
    then Mostly
    Cloudy and
    Breezy

  • Tuesday Night

    Tuesday Night: A slight chance of rain after 1am. Mostly cloudy, with a low around 29. Breezy, with a south southeast wind 18 to 20 mph, with gusts as high as 31 mph. Chance of precipitation is 20%.

    Low: 29 °F

    Breezy.
    Mostly Cloudy
    then Slight
    Chance Rain

  • Wednesday

    Wednesday: A chance of rain before 1pm. Partly sunny, with a high near 53. Breezy, with a south wind 15 to 21 mph becoming west northwest in the afternoon. Winds could gust as high as 31 mph. Chance of precipitation is 40%.

    High: 53 °F

    Chance Rain
    and Breezy

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 29. Breezy, with a west wind 14 to 20 mph, with gusts as high as 29 mph.

    Low: 29 °F

    Partly Cloudy
    and Breezy
    then Partly
    Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 45. Northwest wind 11 to 13 mph.

    High: 45 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A slight chance of rain and snow after 1am. Partly cloudy, with a low around 25. North northwest wind 5 to 9 mph becoming east southeast after midnight. Chance of precipitation is 20%.

    Low: 25 °F

    Partly Cloudy
    then Slight
    Chance
    Rain/Snow

Detailed Forecast

Tonight
Mostly cloudy, with a low around 23. North wind 10 to 16 mph, with gusts as high as 26 mph.
Monday
Mostly cloudy, then gradually becoming sunny, with a high near 31. North wind 10 to 14 mph, with gusts as high as 22 mph.
Monday Night
Partly cloudy, with a low around 14. North wind 6 to 13 mph becoming east after midnight.
Tuesday
Mostly cloudy, with a high near 36. Breezy, with a south southeast wind 10 to 20 mph, with gusts as high as 30 mph.
Tuesday Night
A slight chance of rain after 1am. Mostly cloudy, with a low around 29. Breezy, with a south southeast wind 18 to 20 mph, with gusts as high as 31 mph. Chance of precipitation is 20%.
Wednesday
A chance of rain before 1pm. Partly sunny, with a high near 53. Breezy, with a south wind 15 to 21 mph becoming west northwest in the afternoon. Winds could gust as high as 31 mph. Chance of precipitation is 40%.
Wednesday Night
Partly cloudy, with a low around 29. Breezy, with a west wind 14 to 20 mph, with gusts as high as 29 mph.
Thursday
Mostly sunny, with a high near 45. Northwest wind 11 to 13 mph.
Thursday Night
A slight chance of rain and snow after 1am. Partly cloudy, with a low around 25. North northwest wind 5 to 9 mph becoming east southeast after midnight. Chance of precipitation is 20%.
Friday
A chance of rain and snow before 1pm, then a chance of rain. Mostly sunny, with a high near 53. Chance of precipitation is 30%.
Friday Night
A slight chance of rain. Mostly cloudy, with a low around 36. Chance of precipitation is 20%.
Saturday
A chance of rain. Partly sunny, with a high near 58. Chance of precipitation is 40%.
Saturday Night
A chance of rain. Mostly cloudy, with a low around 46. Chance of precipitation is 50%.
Sunday
Rain likely. Mostly cloudy, with a high near 65. Chance of precipitation is 60%.
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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:
8:51 pm CDT Apr 5, 2026
Forecast Valid:
9pm CDT Apr 5, 2026-6pm CDT Apr 12, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation