Heavy Lake Effect Snow; Subfreezing Temperatures in the Eastern U.S.

A multi-day heavy lake effect snow event is expected downwind of Lakes Erie and Ontario through New Year's Day. The Arctic front will continue to bring increasing winds to the Northeast that will remain gusty. Subfreezing overnight low temperatures will be found as far south as the Gulf Coast. Read More >

Current conditions at

Watertown, Watertown Municipal Airport (KATY)

Lat: 44.9°NLon: 97.15°WElev: 1745ft.

Fair

15°F

-9°C

Humidity 77%
Wind Speed SW 7 mph
Barometer 30.21 in (1026.9 mb)
Dewpoint 9°F (-13°C)
Visibility 10.00 mi
Wind Chill5°F (-15°C)
Last update 30 Dec 12:53 am CST
Extended Forecast for

Watertown SD

  • Overnight

    Overnight: Mostly cloudy, with a low around 5. Southwest wind 11 to 13 mph.

    Low: 5 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 33. West northwest wind 11 to 16 mph, with gusts as high as 26 mph.

    High: 33 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 16. West northwest wind 9 to 15 mph, with gusts as high as 23 mph.

    Low: 16 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 24. Northwest wind 8 to 13 mph becoming north northeast in the afternoon.

    High: 24 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 2. North northeast wind 5 to 13 mph becoming southeast after midnight.

    Low: 2 °F

    Mostly Cloudy

  • New Year's Day

    New Year's Day: Partly sunny, with a high near 21. South southwest wind 5 to 8 mph.

    High: 21 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 9. South southwest wind around 6 mph becoming north after midnight.

    Low: 9 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 21. North wind around 7 mph.

    High: 21 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 12. Northeast wind 6 to 8 mph becoming south after midnight.

    Low: 12 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 5. Southwest wind 11 to 13 mph.
Tuesday
Partly sunny, with a high near 33. West northwest wind 11 to 16 mph, with gusts as high as 26 mph.
Tuesday Night
Mostly cloudy, with a low around 16. West northwest wind 9 to 15 mph, with gusts as high as 23 mph.
Wednesday
Mostly cloudy, with a high near 24. Northwest wind 8 to 13 mph becoming north northeast in the afternoon.
Wednesday Night
Mostly cloudy, with a low around 2. North northeast wind 5 to 13 mph becoming southeast after midnight.
New Year's Day
Partly sunny, with a high near 21. South southwest wind 5 to 8 mph.
Thursday Night
Mostly cloudy, with a low around 9. South southwest wind around 6 mph becoming north after midnight.
Friday
Partly sunny, with a high near 21. North wind around 7 mph.
Friday Night
Mostly cloudy, with a low around 12. Northeast wind 6 to 8 mph becoming south after midnight.
Saturday
Partly sunny, with a high near 29.
Saturday Night
Mostly cloudy, with a low around 17.
Sunday
Mostly sunny, with a high near 34.
Sunday Night
Partly cloudy, with a low around 18.
Monday
Mostly sunny, with a high near 30.
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ABOUT THIS FORECAST

 
Point Forecast:
Watertown SD
 44.91°N 97.17°W (Elev. 1755 ft)
12:36 am CST Dec 30, 2025
12am CST Dec 30, 2025-6pm CST Jan 5, 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