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

55°F

13°C

Humidity 53%
Wind Speed Calm
Barometer 30.27 in (1025.7 mb)
Dewpoint 38°F (3°C)
Visibility 10.00 mi
Last update 4 Oct 7:53 pm CDT
Extended Forecast for

4 Miles ESE Castlewood SD

  • Tonight

    Tonight: Mostly clear, with a low around 41. Calm wind becoming east southeast around 5 mph after midnight.

    Low: 41 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 71. Breezy, with a south wind 7 to 12 mph increasing to 18 to 23 mph in the afternoon. Winds could gust as high as 36 mph.

    High: 71 °F

    Mostly Sunny
    then Sunny
    and Breezy

  • Monday Night

    Monday Night: Clear, with a low around 53. Breezy, with a south southwest wind 14 to 23 mph, with gusts as high as 36 mph.

    Low: 53 °F

    Clear and
    Breezy then
    Clear

  • Tuesday

    Tuesday: Partly sunny, then gradually becoming sunny, with a high near 76. Southwest wind 8 to 11 mph becoming northwest in the morning.

    High: 76 °F

    Becoming
    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 50. Northwest wind 3 to 5 mph.

    Low: 50 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 70. North northwest wind 5 to 11 mph, with gusts as high as 20 mph.

    High: 70 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 47. Northwest wind around 5 mph becoming light and variable in the evening.

    Low: 47 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 67. South southeast wind 5 to 10 mph becoming east in the afternoon.

    High: 67 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 46. East southeast wind 3 to 5 mph.

    Low: 46 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 41. Calm wind becoming east southeast around 5 mph after midnight.
Monday
Mostly sunny, with a high near 71. Breezy, with a south wind 7 to 12 mph increasing to 18 to 23 mph in the afternoon. Winds could gust as high as 36 mph.
Monday Night
Clear, with a low around 53. Breezy, with a south southwest wind 14 to 23 mph, with gusts as high as 36 mph.
Tuesday
Partly sunny, then gradually becoming sunny, with a high near 76. Southwest wind 8 to 11 mph becoming northwest in the morning.
Tuesday Night
Mostly clear, with a low around 50. Northwest wind 3 to 5 mph.
Wednesday
Sunny, with a high near 70. North northwest wind 5 to 11 mph, with gusts as high as 20 mph.
Wednesday Night
Partly cloudy, with a low around 47. Northwest wind around 5 mph becoming light and variable in the evening.
Thursday
Mostly sunny, with a high near 67. South southeast wind 5 to 10 mph becoming east in the afternoon.
Thursday Night
Partly cloudy, with a low around 46. East southeast wind 3 to 5 mph.
Friday
Mostly sunny, with a high near 68.
Friday Night
Mostly clear, with a low around 57. Breezy.
Saturday
Sunny, with a high near 75. Breezy.
Saturday Night
Mostly clear, with a low around 58. Breezy.
Sunday
A slight chance of showers. Mostly sunny, with a high near 68. Breezy. Chance of precipitation is 20%.
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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:
8:21 pm CDT Oct 4, 2026
Forecast Valid:
8pm CDT Oct 4, 2026-6pm CDT Oct 11, 2026
 
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Additional Resources

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