Lake-effect Snow and Whiteout Conditions in the Great Lakes Region; Below-average Temperatures in the East

Heavy lake-effect and lake-enhanced snow will persist downwind of the Great Lakes and produce some whiteout conditions that could cause difficult travel conditions. A coastal low will produce moderate to heavy snow over parts of southern and eastern New England into the afternoon. Below average temperatures are expected across the eastern U.S., particularly with chilly morning temperatures. Read More >

Current conditions at

Watertown, Watertown Municipal Airport (KATY)

Lat: 44.9°NLon: 97.15°WElev: 1745ft.

Fair

-3°F

-19°C

Humidity 68%
Wind Speed W 12 G 23 mph
Barometer 30.28 in (1030.6 mb)
Dewpoint -11°F (-24°C)
Visibility 10.00 mi
Wind Chill-21°F (-29°C)
Last update 19 Jan 10:53 am CST
Extended Forecast for

Watertown SD

  • M.L.King Day

    M.L.King Day: Mostly cloudy and cold, with a high near 5. Wind chill values as low as -23. West wind 10 to 15 mph, with gusts as high as 24 mph.

    High: 5 °F

    Cold

  • Tonight

    Tonight: Mostly clear, with a low around -6. Northwest wind 5 to 10 mph becoming light and variable.

    Low: -6 °F

    Mostly Clear

  • Tuesday

    Tuesday: A chance of snow after noon.  Increasing clouds, with a high near 15. South wind 5 to 8 mph.  Chance of precipitation is 50%.

    High: 15 °F

    Partly Sunny
    then Chance
    Snow

  • Tuesday Night

    Tuesday Night: A chance of snow before midnight.  Mostly cloudy, with a low around 8. South wind 6 to 10 mph becoming west in the evening.  Chance of precipitation is 30%.

    Low: 8 °F

    Chance Snow
    then Mostly
    Cloudy

  • Wednesday

    Wednesday: A chance of snow.  Patchy blowing snow between noon and 5pm. Partly sunny, with a high near 23. Blustery, with a northwest wind 10 to 15 mph increasing to 17 to 22 mph in the afternoon. Winds could gust as high as 33 mph.  Chance of precipitation is 50%.

    High: 23 °F

    Chance Snow
    and Patchy
    Blowing Snow

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around -1. West wind 10 to 17 mph, with gusts as high as 28 mph.

    Low: -1 °F

    Partly Cloudy

  • Thursday

    Thursday: Partly sunny and cold, with a high near 10. West wind 9 to 14 mph, with gusts as high as 23 mph.

    High: 10 °F

    Cold

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around -18. North northwest wind 7 to 10 mph.

    Low: -18 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly sunny and cold, with a high near -9. North northwest wind 7 to 10 mph.

    High: -9 °F

    Cold

Detailed Forecast

M.L.King Day
Mostly cloudy and cold, with a high near 5. Wind chill values as low as -23. West wind 10 to 15 mph, with gusts as high as 24 mph.
Tonight
Mostly clear, with a low around -6. Northwest wind 5 to 10 mph becoming light and variable.
Tuesday
A chance of snow after noon. Increasing clouds, with a high near 15. South wind 5 to 8 mph. Chance of precipitation is 50%.
Tuesday Night
A chance of snow before midnight. Mostly cloudy, with a low around 8. South wind 6 to 10 mph becoming west in the evening. Chance of precipitation is 30%.
Wednesday
A chance of snow. Patchy blowing snow between noon and 5pm. Partly sunny, with a high near 23. Blustery, with a northwest wind 10 to 15 mph increasing to 17 to 22 mph in the afternoon. Winds could gust as high as 33 mph. Chance of precipitation is 50%.
Wednesday Night
Partly cloudy, with a low around -1. West wind 10 to 17 mph, with gusts as high as 28 mph.
Thursday
Partly sunny and cold, with a high near 10. West wind 9 to 14 mph, with gusts as high as 23 mph.
Thursday Night
Mostly cloudy, with a low around -18. North northwest wind 7 to 10 mph.
Friday
Mostly sunny and cold, with a high near -9. North northwest wind 7 to 10 mph.
Friday Night
Partly cloudy, with a low around -20.
Saturday
Mostly sunny and cold, with a high near 2.
Saturday Night
Mostly cloudy, with a low around -6.
Sunday
Partly sunny, with a high near 17.
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ABOUT THIS FORECAST

 
Point Forecast:
Watertown SD
 44.91°N 97.14°W (Elev. 1736 ft)
10:36 am CST Jan 19, 2026
11am CST Jan 19, 2026-6pm CST Jan 25, 2026
 
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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