Heavy Great Lakes Snow through Friday; Extreme Cold and Potential for Major Winter Storm Late Week into this Weekend

Multiple clipper systems will bring cold temperatures and enhance lake-effect snow downwind of the Great Lakes. An arctic blast will bring frigid temperatures accompanied with gusty winds that may lead to dangerous wind chills beginning in the Northern Plains Thursday before expanding to the South and East. An expansive winter storm will start Friday in the Southern Rockies/Plains and Mid-South. Read More >

Current conditions at

Watertown, Watertown Municipal Airport (KATY)

Lat: 44.9°NLon: 97.15°WElev: 1745ft.

Partly Cloudy

14°F

-10°C

Humidity 88%
Wind Speed SW 12 mph
Barometer 29.75 in (1010.5 mb)
Dewpoint 11°F (-12°C)
Visibility 10.00 mi
Wind Chill0°F (-18°C)
Last update 21 Jan 7:53 am CST
Extended Forecast for

Watertown SD

Extreme Cold Watch January 22, 06:00pm until January 23, 03:00pm
Winter Weather Advisory until January 21, 06:00pm
Click here for hazard details and duration
Extreme Cold Watch
Winter Weather Advisory
  •  
    Winter Weather Advisory until January 21, 06:00pm

    NOW until 6:00pm Wed

    Winter Weather Advisory

  • Today

    High: 25 °F

    Snow and
    Patchy
    Blowing Snow

  • Tonight

    Tonight: Mostly cloudy, with a low around 0. West northwest wind 11 to 17 mph, with gusts as high as 33 mph.

    Low: 0 °F

    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny and cold, with a temperature falling to around -7 by 5pm. Wind chill values as low as -29. Northwest wind 11 to 18 mph, with gusts as high as 29 mph.

    High: 5 °F

    Cold

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around -24. Wind chill values as low as -42. North northwest wind 8 to 15 mph, with gusts as high as 25 mph.

    Low: -24 °F

    Partly Cloudy

  • Friday

    Friday: Sunny and cold, with a high near -12. Northwest wind 5 to 8 mph.

    High: -12 °F

    Cold

  • Friday Night

    Friday Night: Partly cloudy, with a low around -22. Light and variable wind.

    Low: -22 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny and cold, with a high near -1. South wind 5 to 9 mph.

    High: -1 °F

    Cold

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around -14. South southeast wind around 7 mph becoming west northwest after midnight.

    Low: -14 °F

    Mostly Cloudy

Detailed Forecast

Today
Snow, mainly before 11am. Patchy blowing snow. High near 25. Blustery, with a southwest wind 14 to 19 mph becoming northwest 23 to 28 mph in the morning. Winds could gust as high as 43 mph. Chance of precipitation is 90%. Total daytime snow accumulation of around an inch possible.
Tonight
Mostly cloudy, with a low around 0. West northwest wind 11 to 17 mph, with gusts as high as 33 mph.
Thursday
Partly sunny and cold, with a temperature falling to around -7 by 5pm. Wind chill values as low as -29. Northwest wind 11 to 18 mph, with gusts as high as 29 mph.
Thursday Night
Partly cloudy, with a low around -24. Wind chill values as low as -42. North northwest wind 8 to 15 mph, with gusts as high as 25 mph.
Friday
Sunny and cold, with a high near -12. Northwest wind 5 to 8 mph.
Friday Night
Partly cloudy, with a low around -22. Light and variable wind.
Saturday
Mostly sunny and cold, with a high near -1. South wind 5 to 9 mph.
Saturday Night
Mostly cloudy, with a low around -14. South southeast wind around 7 mph becoming west northwest after midnight.
Sunday
Mostly sunny and cold, with a high near 2. West northwest wind 7 to 9 mph.
Sunday Night
Partly cloudy, with a low around -11.
Monday
Mostly sunny, with a high near 16.
Monday Night
Partly cloudy, with a low around 1.
Tuesday
Partly sunny, with a high near 18.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
Watertown SD
 44.91°N 97.14°W (Elev. 1736 ft)
7:47 am CST Jan 21, 2026
8am CST Jan 21, 2026-6pm CST Jan 27, 2026
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database