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 >

Hazardous Weather Conditions

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Fair

20°F

-7°C

Humidity 92%
Wind Speed Calm
Barometer 30.56 in (1035.3 mb)
Dewpoint 18°F (-8°C)
Visibility 10.00 mi
Last update 27 Jan 7:56 am CST
Extended Forecast for

Mountain City TX

Extreme Cold Warning January 27, 08:52am until January 27, 09:00am
Click here for hazard details and duration
...
  •  
    Extreme Cold Warning January 27, 08:52am until January 27, 09:00am

    NOW until 9:00am Tue

    Extreme Cold Warning

  • Today

    High: 49 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming clear, with a low around 25. Calm wind becoming west northwest around 5 mph after midnight.

    Low: 25 °F

    Decreasing
    Clouds

  • Wednesday

    Wednesday: Sunny, with a high near 54. North northwest wind around 5 mph.

    High: 54 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 27. North wind around 5 mph becoming calm.

    Low: 27 °F

    Partly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 62. South southwest wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 62 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 31. West wind 5 to 15 mph becoming north in the evening. Winds could gust as high as 25 mph.

    Low: 31 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 50. North wind 10 to 15 mph, with gusts as high as 30 mph.

    High: 50 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 23. North wind around 10 mph, with gusts as high as 20 mph.

    Low: 23 °F

    Mostly Clear

Detailed Forecast

Today
Mostly sunny, with a high near 49. South southwest wind around 5 mph.
Tonight
Mostly cloudy, then gradually becoming clear, with a low around 25. Calm wind becoming west northwest around 5 mph after midnight.
Wednesday
Sunny, with a high near 54. North northwest wind around 5 mph.
Wednesday Night
Partly cloudy, with a low around 27. North wind around 5 mph becoming calm.
Thursday
Partly sunny, with a high near 62. South southwest wind 5 to 10 mph, with gusts as high as 20 mph.
Thursday Night
Mostly cloudy, with a low around 31. West wind 5 to 15 mph becoming north in the evening. Winds could gust as high as 25 mph.
Friday
Mostly sunny, with a high near 50. North wind 10 to 15 mph, with gusts as high as 30 mph.
Friday Night
Mostly clear, with a low around 23. North wind around 10 mph, with gusts as high as 20 mph.
Saturday
Sunny, with a high near 43. North wind 5 to 10 mph, with gusts as high as 20 mph.
Saturday Night
Mostly clear, with a low around 20.
Sunday
Sunny, with a high near 52.
Sunday Night
Mostly clear, with a low around 31.
Monday
Mostly sunny, with a high near 60.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mountain City TX
 30.04°N 97.89°W (Elev. 837 ft)
Last Update:
6:44 am CST Jan 27, 2026
Forecast Valid:
8am CST Jan 27, 2026-6pm CST Feb 2, 2026
 
Forecast Discussion
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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