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 92%
Wind Speed N 3 mph
Barometer 29.91 in (1013.4 mb)
Dewpoint 31°F (-1°C)
Visibility 10.00 mi
Last update 20 Mar 6:53 am CDT
Extended Forecast for

Watertown SD

  • Today

    Today: Mostly sunny, with a high near 67. Light and variable wind becoming west 5 to 10 mph in the afternoon.

    High: 67 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming clear, with a low around 41. West northwest wind 6 to 9 mph becoming south southeast in the evening.

    Low: 41 °F

    Decreasing
    Clouds

  • Saturday

    Saturday: Mostly sunny, with a high near 76. South southwest wind around 11 mph becoming west in the afternoon. Winds could gust as high as 20 mph.

    High: 76 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 32. North wind 9 to 18 mph, with gusts as high as 29 mph.

    Low: 32 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 43. North wind around 16 mph, with gusts as high as 26 mph.

    High: 43 °F

    Partly Sunny

  • Sunday Night

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

    Low: 25 °F

    Mostly Clear

  • Monday

    Monday: Partly sunny, with a high near 50. South wind 6 to 16 mph, with gusts as high as 25 mph.

    High: 50 °F

    Partly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 31. South wind 10 to 13 mph, with gusts as high as 21 mph.

    Low: 31 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 50. Northeast wind 9 to 14 mph.

    High: 50 °F

    Partly Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 67. Light and variable wind becoming west 5 to 10 mph in the afternoon.
Tonight
Mostly cloudy, then gradually becoming clear, with a low around 41. West northwest wind 6 to 9 mph becoming south southeast in the evening.
Saturday
Mostly sunny, with a high near 76. South southwest wind around 11 mph becoming west in the afternoon. Winds could gust as high as 20 mph.
Saturday Night
Mostly cloudy, with a low around 32. North wind 9 to 18 mph, with gusts as high as 29 mph.
Sunday
Partly sunny, with a high near 43. North wind around 16 mph, with gusts as high as 26 mph.
Sunday Night
Mostly clear, with a low around 25. North wind 5 to 10 mph becoming east after midnight.
Monday
Partly sunny, with a high near 50. South wind 6 to 16 mph, with gusts as high as 25 mph.
Monday Night
Mostly cloudy, with a low around 31. South wind 10 to 13 mph, with gusts as high as 21 mph.
Tuesday
Partly sunny, with a high near 50. Northeast wind 9 to 14 mph.
Tuesday Night
Mostly cloudy, with a low around 33.
Wednesday
Mostly sunny, with a high near 62.
Wednesday Night
A slight chance of rain. Partly cloudy, with a low around 33. Chance of precipitation is 20%.
Thursday
Mostly sunny, with a high near 46. Breezy.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Watertown SD
 44.91°N 97.14°W (Elev. 1736 ft)
Last Update:
7:36 am CDT Mar 20, 2026
Forecast Valid:
7am CDT Mar 20, 2026-6pm CDT Mar 26, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation