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

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

Well below normal temperatures will continue for the eastern half of the Lower 48 this week. Another blast of arctic air will spread from the Plains through the East/Southeast Friday into Saturday with more record lows expected even into Florida. Forecasts are being monitored for increasing potential of another significant winter storm to impact the eastern United States this coming weekend. Read More >

Current conditions at

Watertown, Watertown Municipal Airport (KATY)

Lat: 44.9°NLon: 97.15°WElev: 1745ft.

Fair

4°F

-16°C

Humidity 69%
Wind Speed NW 18 G 28 mph
Barometer 30.07 in (1022.4 mb)
Dewpoint -4°F (-20°C)
Visibility 10.00 mi
Wind Chill-16°F (-27°C)
Last update 27 Jan 1:53 am CST
Extended Forecast for

4 Miles ESE Castlewood SD

  • Overnight

    Overnight: Partly cloudy, with a low around -4. Wind chill values as low as -19. Northwest wind around 18 mph, with gusts as high as 30 mph.

    Low: -4 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny and cold, with a high near 7. Wind chill values as low as -21. Northwest wind 9 to 14 mph, with gusts as high as 26 mph.

    High: 7 °F

    Cold

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a steady temperature around 1. West northwest wind 5 to 7 mph.

    Low: 1 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 11. North northwest wind 5 to 9 mph.

    High: 11 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around -9. North northwest wind 3 to 6 mph.

    Low: -9 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny and cold, with a high near 8. North wind 3 to 8 mph.

    High: 8 °F

    Cold

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around -12. North northeast wind around 7 mph.

    Low: -12 °F

    Partly Cloudy

  • Friday

    Friday: Sunny and cold, with a high near 4. North northeast wind 6 to 8 mph.

    High: 4 °F

    Cold

  • Friday Night

    Friday Night: Mostly clear, with a low around -10. North wind 5 to 7 mph becoming south after midnight.

    Low: -10 °F

    Mostly Clear

Detailed Forecast

Overnight
Partly cloudy, with a low around -4. Wind chill values as low as -19. Northwest wind around 18 mph, with gusts as high as 30 mph.
Tuesday
Sunny and cold, with a high near 7. Wind chill values as low as -21. Northwest wind 9 to 14 mph, with gusts as high as 26 mph.
Tuesday Night
Partly cloudy, with a steady temperature around 1. West northwest wind 5 to 7 mph.
Wednesday
Mostly sunny, with a high near 11. North northwest wind 5 to 9 mph.
Wednesday Night
Partly cloudy, with a low around -9. North northwest wind 3 to 6 mph.
Thursday
Sunny and cold, with a high near 8. North wind 3 to 8 mph.
Thursday Night
Partly cloudy, with a low around -12. North northeast wind around 7 mph.
Friday
Sunny and cold, with a high near 4. North northeast wind 6 to 8 mph.
Friday Night
Mostly clear, with a low around -10. North wind 5 to 7 mph becoming south after midnight.
Saturday
A slight chance of snow after noon. Mostly sunny, with a high near 17. Chance of precipitation is 20%.
Saturday Night
A chance of snow. Mostly cloudy, with a low around 9. Chance of precipitation is 40%.
Sunday
A slight chance of snow. Mostly cloudy, with a high near 28. Chance of precipitation is 20%.
Sunday Night
Mostly cloudy, with a low around 12.
Monday
Partly sunny, with a high near 27.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles ESE Castlewood SD
 44.72°N 96.96°W (Elev. 1749 ft)
Last Update:
2:37 am CST Jan 27, 2026
Forecast Valid:
2am CST Jan 27, 2026-6pm CST Feb 2, 2026
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation