National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Late January Extreme Cold; Watching East Coast Storm Threat This Weekend

The next blast of Arctic air surges south down the Plains, across the Great Lakes and through the Southeast and East Friday through Saturday. This could be longest duration of cold in several decades. Forecast models are being closely monitored for potential of another significant winter storm to impact the eastern United States this coming weekend. Confidence in coastal impacts has increased. Read More >

Current conditions at

Watertown, Watertown Municipal Airport (KATY)

Lat: 44.9°NLon: 97.15°WElev: 1745ft.

Fair

9°F

-13°C

Humidity 64%
Wind Speed N 9 mph
Barometer 30.23 in (1027.9 mb)
Dewpoint -1°F (-18°C)
Visibility 10.00 mi
Wind Chill-4°F (-20°C)
Last update 28 Jan 12:53 pm CST
Extended Forecast for

Watertown SD

  • This Afternoon

    This Afternoon: Mostly sunny and cold, with a steady temperature around 10. North wind 6 to 11 mph.

    High: 10 °F

    Cold

  • Tonight

    Tonight: Partly cloudy, with a low around -6. North wind around 6 mph becoming calm in the evening.

    Low: -6 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 12. Calm wind becoming north around 5 mph in the afternoon.

    High: 12 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around -10. Wind chill values as low as -24. North northeast wind around 7 mph.

    Low: -10 °F

    Partly Cloudy

  • Friday

    Friday: Sunny and cold, with a high near 4. North northeast wind 7 to 10 mph.

    High: 4 °F

    Cold

  • Friday Night

    Friday Night: Mostly clear, with a low around -11. North wind around 6 mph becoming calm.

    Low: -11 °F

    Mostly Clear

  • Saturday

    Saturday: A slight chance of snow after noon. Mostly sunny, with a high near 17. South wind 7 to 17 mph, with gusts as high as 28 mph. Chance of precipitation is 20%.

    High: 17 °F

    Sunny then
    Slight Chance
    Snow

  • Saturday Night

    Saturday Night: Snow likely, mainly before midnight. Mostly cloudy, with a low around 11. South wind 11 to 17 mph, with gusts as high as 28 mph. Chance of precipitation is 60%.

    Low: 11 °F

    Snow Likely

  • Sunday

    Sunday: A slight chance of snow before noon. Mostly cloudy, with a high near 28. West northwest wind 11 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.

    High: 28 °F

    Slight Chance
    Snow then
    Mostly Cloudy

Detailed Forecast

This Afternoon
Mostly sunny and cold, with a steady temperature around 10. North wind 6 to 11 mph.
Tonight
Partly cloudy, with a low around -6. North wind around 6 mph becoming calm in the evening.
Thursday
Mostly sunny, with a high near 12. Calm wind becoming north around 5 mph in the afternoon.
Thursday Night
Partly cloudy, with a low around -10. Wind chill values as low as -24. North northeast wind around 7 mph.
Friday
Sunny and cold, with a high near 4. North northeast wind 7 to 10 mph.
Friday Night
Mostly clear, with a low around -11. North wind around 6 mph becoming calm.
Saturday
A slight chance of snow after noon. Mostly sunny, with a high near 17. South wind 7 to 17 mph, with gusts as high as 28 mph. Chance of precipitation is 20%.
Saturday Night
Snow likely, mainly before midnight. Mostly cloudy, with a low around 11. South wind 11 to 17 mph, with gusts as high as 28 mph. Chance of precipitation is 60%.
Sunday
A slight chance of snow before noon. Mostly cloudy, with a high near 28. West northwest wind 11 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.
Sunday Night
Mostly cloudy, with a low around 11.
Monday
Partly sunny, with a high near 23.
Monday Night
Mostly cloudy, with a low around 11.
Tuesday
Mostly cloudy, with a high near 26.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Watertown SD
 44.91°N 97.14°W (Elev. 1736 ft)
Last Update:
1:06 pm CST Jan 28, 2026
Forecast Valid:
1pm CST Jan 28, 2026-6pm CST Feb 3, 2026
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation