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

43°F

6°C

Humidity 89%
Wind Speed SE 5 mph
Barometer 29.77 in (1008.3 mb)
Dewpoint 40°F (4°C)
Visibility 10.00 mi
Wind Chill40°F (4°C)
Last update 21 Mar 3:53 am CDT
Extended Forecast for

Watertown SD

  • Today

    Today: Sunny, with a high near 77. South wind 6 to 11 mph becoming west northwest in the morning.

    High: 77 °F

    Sunny

  • Tonight

    Tonight: A slight chance of rain after 1am. Mostly cloudy, with a low around 30. North northeast wind 10 to 18 mph, with gusts as high as 30 mph. Chance of precipitation is 20%.

    Low: 30 °F

    Partly Cloudy
    then Slight
    Chance Rain

  • Sunday

    Sunday: Cloudy through mid morning, then gradual clearing, with a high near 42. North wind 11 to 16 mph, with gusts as high as 25 mph.

    High: 42 °F

    Gradual
    Clearing

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 25. North northwest wind 5 to 9 mph becoming light and variable.

    Low: 25 °F

    Mostly Clear

  • Monday

    Monday: A slight chance of rain after 1pm. Partly sunny, with a high near 50. South wind 6 to 16 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.

    High: 50 °F

    Mostly Sunny
    then Slight
    Chance Rain

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 34. South wind 11 to 14 mph, with gusts as high as 22 mph.

    Low: 34 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 53. East wind 10 to 13 mph, with gusts as high as 21 mph.

    High: 53 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 33. East wind around 11 mph.

    Low: 33 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 59. East southeast wind 10 to 15 mph becoming west southwest in the afternoon.

    High: 59 °F

    Partly Sunny

Detailed Forecast

Today
Sunny, with a high near 77. South wind 6 to 11 mph becoming west northwest in the morning.
Tonight
A slight chance of rain after 1am. Mostly cloudy, with a low around 30. North northeast wind 10 to 18 mph, with gusts as high as 30 mph. Chance of precipitation is 20%.
Sunday
Cloudy through mid morning, then gradual clearing, with a high near 42. North wind 11 to 16 mph, with gusts as high as 25 mph.
Sunday Night
Mostly clear, with a low around 25. North northwest wind 5 to 9 mph becoming light and variable.
Monday
A slight chance of rain after 1pm. Partly sunny, with a high near 50. South wind 6 to 16 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.
Monday Night
Mostly cloudy, with a low around 34. South wind 11 to 14 mph, with gusts as high as 22 mph.
Tuesday
Mostly cloudy, with a high near 53. East wind 10 to 13 mph, with gusts as high as 21 mph.
Tuesday Night
Mostly cloudy, with a low around 33. East wind around 11 mph.
Wednesday
Partly sunny, with a high near 59. East southeast wind 10 to 15 mph becoming west southwest in the afternoon.
Wednesday Night
A slight chance of rain after 1am. Mostly cloudy, with a low around 33. Chance of precipitation is 20%.
Thursday
Partly sunny, with a high near 44. Breezy.
Thursday Night
Mostly cloudy, with a low around 21.
Friday
Partly sunny, with a high near 43.
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ABOUT THIS FORECAST

 
Point Forecast:
Watertown SD
 44.91°N 97.14°W (Elev. 1736 ft)
Last Update:
3:36 am CDT Mar 21, 2026
Forecast Valid:
4am CDT Mar 21, 2026-6pm CDT Mar 27, 2026
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation