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

-8°F

-22°C

Humidity 82%
Wind Speed Calm
Barometer 30.13 in (1025.2 mb)
Dewpoint -12°F (-24°C)
Visibility 10.00 mi
Last update 20 Jan 5:53 am CST
Extended Forecast for

Watertown SD

  • Today

    Today: Snow likely, mainly after 3pm.  Increasing clouds, with a high near 17. Light south wind becoming south southwest 5 to 10 mph in the morning.  Chance of precipitation is 70%. Total daytime snow accumulation of less than one inch possible.

    High: 17 °F

    Partly Sunny
    then Snow
    Likely

  • Tonight

    Tonight: A chance of snow, mainly before 9pm.  Mostly cloudy, with a low around 9. South southwest wind 7 to 10 mph becoming west northwest in the evening. Winds could gust as high as 20 mph.  Chance of precipitation is 50%.

    Low: 9 °F

    Chance Snow
    then Mostly
    Cloudy

  • Wednesday

    Wednesday: Snow likely, mainly before noon.  Patchy blowing snow after 11am. Mostly cloudy, with a high near 24. Blustery, with a northwest wind 13 to 18 mph increasing to 23 to 28 mph in the afternoon. Winds could gust as high as 40 mph.  Chance of precipitation is 60%. New snow accumulation of less than one inch possible.

    High: 24 °F

    Snow Likely
    and Patchy
    Blowing Snow

  • Wednesday Night

    Wednesday Night: Patchy blowing snow before 7pm. Partly cloudy, with a low around 0. Blustery, with a west northwest wind 10 to 20 mph, with gusts as high as 31 mph.

    Low: 0 °F

    Patchy
    Blowing Snow
    and Blustery
    then Partly
    Cloudy

  • Thursday

    Thursday: Partly sunny and cold, with a high near 6. West northwest wind 10 to 16 mph, with gusts as high as 26 mph.

    High: 6 °F

    Cold

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around -24. North northwest wind 7 to 13 mph, with gusts as high as 21 mph.

    Low: -24 °F

    Partly Cloudy

  • Friday

    Friday: Sunny and cold, with a high near -12. Northwest wind around 7 mph.

    High: -12 °F

    Cold

  • Friday Night

    Friday Night: Partly cloudy, with a low around -22. Northwest wind around 6 mph becoming light and variable.

    Low: -22 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny and cold, with a high near 0. South wind 6 to 9 mph.

    High: 0 °F

    Cold

Detailed Forecast

Today
Snow likely, mainly after 3pm. Increasing clouds, with a high near 17. Light south wind becoming south southwest 5 to 10 mph in the morning. Chance of precipitation is 70%. Total daytime snow accumulation of less than one inch possible.
Tonight
A chance of snow, mainly before 9pm. Mostly cloudy, with a low around 9. South southwest wind 7 to 10 mph becoming west northwest in the evening. Winds could gust as high as 20 mph. Chance of precipitation is 50%.
Wednesday
Snow likely, mainly before noon. Patchy blowing snow after 11am. Mostly cloudy, with a high near 24. Blustery, with a northwest wind 13 to 18 mph increasing to 23 to 28 mph in the afternoon. Winds could gust as high as 40 mph. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.
Wednesday Night
Patchy blowing snow before 7pm. Partly cloudy, with a low around 0. Blustery, with a west northwest wind 10 to 20 mph, with gusts as high as 31 mph.
Thursday
Partly sunny and cold, with a high near 6. West northwest wind 10 to 16 mph, with gusts as high as 26 mph.
Thursday Night
Partly cloudy, with a low around -24. North northwest wind 7 to 13 mph, with gusts as high as 21 mph.
Friday
Sunny and cold, with a high near -12. Northwest wind around 7 mph.
Friday Night
Partly cloudy, with a low around -22. Northwest wind around 6 mph becoming light and variable.
Saturday
Mostly sunny and cold, with a high near 0. South wind 6 to 9 mph.
Saturday Night
Partly cloudy, with a low around -12.
Sunday
Mostly sunny and cold, with a high near 9.
Sunday Night
Partly cloudy, with a low around -5.
Monday
Mostly sunny, with a high near 18.
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ABOUT THIS FORECAST

 
Point Forecast:
Watertown SD
 44.91°N 97.14°W (Elev. 1736 ft)
5:36 am CST Jan 20, 2026
6am CST Jan 20, 2026-6pm CST Jan 26, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database