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

33°F

1°C

Humidity 75%
Wind Speed S 6 mph
Barometer 30.10 in (1020.6 mb)
Dewpoint 26°F (-3°C)
Visibility 10.00 mi
Wind Chill27°F (-3°C)
Last update 2 May 1:53 am CDT
Extended Forecast for

4 Miles ESE Castlewood SD

  • Overnight

    Overnight: Mostly clear, with a low around 29. Calm wind becoming south southwest around 5 mph.

    Low: 29 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 64. Southwest wind 7 to 17 mph, with gusts as high as 28 mph.

    High: 64 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Cloudy, then gradually becoming partly cloudy, with a low around 38. Southwest wind 9 to 13 mph becoming north after midnight. Winds could gust as high as 22 mph.

    Low: 38 °F

    Decreasing
    Clouds

  • Sunday

    Sunday: Sunny, with a high near 63. North northwest wind 9 to 14 mph, with gusts as high as 22 mph.

    High: 63 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 46. Southwest wind 10 to 14 mph, with gusts as high as 23 mph.

    Low: 46 °F

    Partly Cloudy

  • Monday

    Monday: A slight chance of showers after 1pm. Partly sunny, with a high near 63. Breezy, with a west southwest wind 14 to 21 mph becoming northwest in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 20%.

    High: 63 °F

    Partly Sunny
    then Slight
    Chance
    Showers and
    Breezy

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 32. North northwest wind 13 to 18 mph decreasing to 7 to 12 mph after midnight. Winds could gust as high as 28 mph.

    Low: 32 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 49. North northwest wind 7 to 15 mph, with gusts as high as 23 mph.

    High: 49 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 29. North northwest wind 8 to 13 mph becoming light north northeast after midnight.

    Low: 29 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Mostly clear, with a low around 29. Calm wind becoming south southwest around 5 mph.
Saturday
Mostly sunny, with a high near 64. Southwest wind 7 to 17 mph, with gusts as high as 28 mph.
Saturday Night
Cloudy, then gradually becoming partly cloudy, with a low around 38. Southwest wind 9 to 13 mph becoming north after midnight. Winds could gust as high as 22 mph.
Sunday
Sunny, with a high near 63. North northwest wind 9 to 14 mph, with gusts as high as 22 mph.
Sunday Night
Partly cloudy, with a low around 46. Southwest wind 10 to 14 mph, with gusts as high as 23 mph.
Monday
A slight chance of showers after 1pm. Partly sunny, with a high near 63. Breezy, with a west southwest wind 14 to 21 mph becoming northwest in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 20%.
Monday Night
Mostly cloudy, with a low around 32. North northwest wind 13 to 18 mph decreasing to 7 to 12 mph after midnight. Winds could gust as high as 28 mph.
Tuesday
Partly sunny, with a high near 49. North northwest wind 7 to 15 mph, with gusts as high as 23 mph.
Tuesday Night
Mostly cloudy, with a low around 29. North northwest wind 8 to 13 mph becoming light north northeast after midnight.
Wednesday
Partly sunny, with a high near 49.
Wednesday Night
Mostly cloudy, with a low around 30.
Thursday
Mostly sunny, with a high near 57.
Thursday Night
Partly cloudy, with a low around 35.
Friday
Mostly sunny, with a high near 64.
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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:
1:31 am CDT May 2, 2026
Forecast Valid:
2am CDT May 2, 2026-6pm CDT May 8, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation