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

19°F

-7°C

Humidity 92%
Wind Speed Calm
Barometer 29.75 in (1010.3 mb)
Dewpoint 17°F (-8°C)
Visibility 9.00 mi
Last update 18 Mar 4:53 am CDT
Extended Forecast for

Willow Lake SD

  • Today

    Today: Mostly sunny, with a high near 46. West southwest wind 5 to 10 mph.

    High: 46 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 31. Southwest wind around 7 mph becoming northwest after midnight.

    Low: 31 °F

    Mostly Cloudy

  • Thursday

    Thursday: Patchy fog before 11am. Otherwise, mostly sunny, with a high near 55. North northwest wind 6 to 11 mph becoming south southwest in the afternoon.

    High: 55 °F

    Patchy Fog
    then Mostly
    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 38. South wind 8 to 10 mph becoming west after midnight.

    Low: 38 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 68. West northwest wind 8 to 17 mph.

    High: 68 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 42. Northwest wind around 10 mph becoming southeast after midnight.

    Low: 42 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 69. South southwest wind 11 to 18 mph becoming north northwest in the afternoon. Winds could gust as high as 26 mph.

    High: 69 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 30. Blustery, with a north northeast wind 18 to 22 mph.

    Low: 30 °F

    Mostly Cloudy
    and Blustery

  • Sunday

    Sunday: Mostly cloudy, with a high near 41. Breezy, with a north wind 17 to 20 mph.

    High: 41 °F

    Mostly Cloudy
    and Breezy
    then Partly
    Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 46. West southwest wind 5 to 10 mph.
Tonight
Mostly cloudy, with a low around 31. Southwest wind around 7 mph becoming northwest after midnight.
Thursday
Patchy fog before 11am. Otherwise, mostly sunny, with a high near 55. North northwest wind 6 to 11 mph becoming south southwest in the afternoon.
Thursday Night
Partly cloudy, with a low around 38. South wind 8 to 10 mph becoming west after midnight.
Friday
Mostly sunny, with a high near 68. West northwest wind 8 to 17 mph.
Friday Night
Partly cloudy, with a low around 42. Northwest wind around 10 mph becoming southeast after midnight.
Saturday
Mostly sunny, with a high near 69. South southwest wind 11 to 18 mph becoming north northwest in the afternoon. Winds could gust as high as 26 mph.
Saturday Night
Mostly cloudy, with a low around 30. Blustery, with a north northeast wind 18 to 22 mph.
Sunday
Mostly cloudy, with a high near 41. Breezy, with a north wind 17 to 20 mph.
Sunday Night
Mostly cloudy, with a low around 24.
Monday
Mostly sunny, with a high near 45. Breezy.
Monday Night
Mostly cloudy, with a low around 31.
Tuesday
Mostly cloudy, with a high near 50.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Willow Lake SD
 44.62°N 97.65°W (Elev. 1762 ft)
Last Update:
4:36 am CDT Mar 18, 2026
Forecast Valid:
5am CDT Mar 18, 2026-6pm CDT Mar 24, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation