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

Arctic Front Brings Winter Weather and Colder Temperatures to the Eastern U.S.

A series of cold fronts will bring heavy lake effect snow to the northern Great Lakes. The fronts will merge over the Ohio Valley and bring colder temperatures east of the Mississippi River later today into the end of the week. Additionally, wintry weather will develop over the Ohio Valley, Appalachians, and Northeast as rain switches over to snow tonight into Thursday morning. Read More >

Hazardous Weather Conditions

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Fair and Breezy

66°F

19°C

Humidity 26%
Wind Speed N 22 G 30 mph
Barometer 30.15 in (1020.5 mb)
Dewpoint 30°F (-1°C)
Visibility 10.00 mi
Last update 14 Jan 4:56 pm CST
Extended Forecast for

Mountain City TX

  • Tonight

    Tonight: Clear, with a low around 35. North wind 5 to 15 mph, with gusts as high as 25 mph.

    Low: 35 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 65. North northwest wind 5 to 10 mph becoming south southwest in the afternoon.

    High: 65 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 43. South southwest wind around 10 mph, with gusts as high as 20 mph.

    Low: 43 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 72. Southwest wind around 10 mph becoming north in the afternoon. Winds could gust as high as 20 mph.

    High: 72 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 39. North northeast wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 39 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 54. Northeast wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 54 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 29. Northeast wind around 5 mph becoming west after midnight.

    Low: 29 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 62. West wind 5 to 10 mph becoming south in the afternoon.

    High: 62 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 39. South wind around 5 mph.

    Low: 39 °F

    Mostly Clear

Detailed Forecast

Tonight
Clear, with a low around 35. North wind 5 to 15 mph, with gusts as high as 25 mph.
Thursday
Sunny, with a high near 65. North northwest wind 5 to 10 mph becoming south southwest in the afternoon.
Thursday Night
Clear, with a low around 43. South southwest wind around 10 mph, with gusts as high as 20 mph.
Friday
Sunny, with a high near 72. Southwest wind around 10 mph becoming north in the afternoon. Winds could gust as high as 20 mph.
Friday Night
Mostly clear, with a low around 39. North northeast wind 5 to 10 mph, with gusts as high as 20 mph.
Saturday
Mostly sunny, with a high near 54. Northeast wind 5 to 10 mph, with gusts as high as 20 mph.
Saturday Night
Mostly clear, with a low around 29. Northeast wind around 5 mph becoming west after midnight.
Sunday
Sunny, with a high near 62. West wind 5 to 10 mph becoming south in the afternoon.
Sunday Night
Mostly clear, with a low around 39. South wind around 5 mph.
M.L.King Day
Partly sunny, with a high near 65.
Monday Night
Mostly cloudy, with a low around 41.
Tuesday
Mostly cloudy, with a high near 55.
Tuesday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 43.
Wednesday
A 20 percent chance of showers. Mostly cloudy, with a high near 61.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mountain City TX
 30.04°N 97.89°W (Elev. 837 ft)
Last Update:
4:44 pm CST Jan 14, 2026
Forecast Valid:
5pm CST Jan 14, 2026-6pm CST Jan 21, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation