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

63°F

17°C

Humidity 58%
Wind Speed SW 9 mph
Barometer 29.92 in (1013.7 mb)
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Last update 20 Mar 1:53 pm CDT
Extended Forecast for

4 Miles ESE Castlewood SD

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 69. West northwest wind 5 to 7 mph.

    High: 69 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 43. Northwest wind 5 to 10 mph becoming southeast after midnight.

    Low: 43 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 78. South southwest wind around 11 mph becoming west in the afternoon.

    High: 78 °F

    Sunny

  • Saturday Night

    Saturday Night: Increasing clouds, with a low around 32. Breezy, with a north northeast wind 11 to 16 mph increasing to 19 to 24 mph in the evening. Winds could gust as high as 41 mph.

    Low: 32 °F

    Increasing
    Clouds and
    Breezy

  • Sunday

    Sunday: Partly sunny, with a high near 44. North wind 14 to 17 mph, with gusts as high as 26 mph.

    High: 44 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 25. North northwest wind 5 to 10 mph becoming east northeast after midnight.

    Low: 25 °F

    Mostly Clear

  • Monday

    Monday: Partly sunny, with a high near 50. East southeast wind 6 to 16 mph becoming south in the afternoon. Winds could gust as high as 25 mph.

    High: 50 °F

    Partly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 32. South wind 11 to 14 mph.

    Low: 32 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 54. East northeast wind 10 to 14 mph.

    High: 54 °F

    Partly Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 69. West northwest wind 5 to 7 mph.
Tonight
Partly cloudy, with a low around 43. Northwest wind 5 to 10 mph becoming southeast after midnight.
Saturday
Sunny, with a high near 78. South southwest wind around 11 mph becoming west in the afternoon.
Saturday Night
Increasing clouds, with a low around 32. Breezy, with a north northeast wind 11 to 16 mph increasing to 19 to 24 mph in the evening. Winds could gust as high as 41 mph.
Sunday
Partly sunny, with a high near 44. North wind 14 to 17 mph, with gusts as high as 26 mph.
Sunday Night
Mostly clear, with a low around 25. North northwest wind 5 to 10 mph becoming east northeast after midnight.
Monday
Partly sunny, with a high near 50. East southeast wind 6 to 16 mph becoming south in the afternoon. Winds could gust as high as 25 mph.
Monday Night
Mostly cloudy, with a low around 32. South wind 11 to 14 mph.
Tuesday
Partly sunny, with a high near 54. East northeast wind 10 to 14 mph.
Tuesday Night
Mostly cloudy, with a low around 32.
Wednesday
Mostly cloudy, with a high near 59.
Wednesday Night
Mostly cloudy, with a low around 35.
Thursday
Mostly sunny, with a high near 47. Breezy.
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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 pm CDT Mar 20, 2026
Forecast Valid:
2pm CDT Mar 20, 2026-6pm CDT Mar 26, 2026
 
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