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

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Fair

53°F

12°C

Humidity 74%
Wind Speed N 5 mph
Barometer 30.28 in (1025.1 mb)
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Wind Chill52°F (11°C)
Last update 6 Apr 2:56 am CDT
Extended Forecast for

Mountain City TX

  • Overnight

    Overnight: Partly cloudy, with a low around 49. North wind around 5 mph.

    Low: 49 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 72. Northeast wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 72 °F

    Sunny

  • Monday Night

    Monday Night: Increasing clouds, with a low around 47. North northeast wind around 5 mph.

    Low: 47 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: Partly sunny, with a high near 75. North wind around 5 mph becoming east southeast in the afternoon.

    High: 75 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 53. East wind around 5 mph becoming calm after midnight.

    Low: 53 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 77. Calm wind becoming southeast around 5 mph in the morning.

    High: 77 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 60. South southeast wind around 5 mph.

    Low: 60 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly cloudy, with a high near 81. Southeast wind around 5 mph.

    High: 81 °F

    Mostly Cloudy

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 62. Southeast wind around 5 mph.

    Low: 62 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Partly cloudy, with a low around 49. North wind around 5 mph.
Monday
Sunny, with a high near 72. Northeast wind 5 to 10 mph, with gusts as high as 20 mph.
Monday Night
Increasing clouds, with a low around 47. North northeast wind around 5 mph.
Tuesday
Partly sunny, with a high near 75. North wind around 5 mph becoming east southeast in the afternoon.
Tuesday Night
Partly cloudy, with a low around 53. East wind around 5 mph becoming calm after midnight.
Wednesday
Partly sunny, with a high near 77. Calm wind becoming southeast around 5 mph in the morning.
Wednesday Night
Mostly cloudy, with a low around 60. South southeast wind around 5 mph.
Thursday
Mostly cloudy, with a high near 81. Southeast wind around 5 mph.
Thursday Night
Mostly cloudy, with a low around 62. Southeast wind around 5 mph.
Friday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 81.
Friday Night
Mostly cloudy, with a low around 64.
Saturday
A 40 percent chance of showers and thunderstorms. Cloudy, with a high near 80.
Saturday Night
A 30 percent chance of showers and thunderstorms. Cloudy, with a low around 67.
Sunday
A 50 percent chance of showers and thunderstorms. Cloudy, with a high near 82.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mountain City TX
 30.02°N 97.92°W (Elev. 853 ft)
Last Update:
2:48 am CDT Apr 6, 2026
Forecast Valid:
3am CDT Apr 6, 2026-6pm CDT Apr 12, 2026
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation