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

49°F

9°C

Humidity 90%
Wind Speed W 3 mph
Barometer 30.04 in (1017.1 mb)
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Last update 13 Nov 6:56 am CST
Extended Forecast for

Mountain City TX

  • Today

    Today: Sunny, with a high near 77. West wind around 5 mph becoming calm in the morning.

    High: 77 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 49. East southeast wind around 5 mph becoming calm.

    Low: 49 °F

    Mostly Clear

  • Saturday

    Saturday: A 20 percent chance of showers after noon. Partly sunny, with a high near 69. Northeast wind 5 to 15 mph becoming southeast in the afternoon. Winds could gust as high as 25 mph.

    High: 69 °F

    Partly Sunny
    then Slight
    Chance
    Showers

  • Saturday Night

    Saturday Night: Showers. Low around 54. East southeast wind 10 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 80%.

    Low: 54 °F

    Showers

  • Sunday

    Sunday: Showers and possibly a thunderstorm. High near 67. East southeast wind around 10 mph becoming north in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 90%.

    High: 67 °F

    Showers

  • Sunday Night

    Sunday Night: A 30 percent chance of showers before midnight. Mostly cloudy, with a low around 48. North northeast wind 10 to 15 mph, with gusts as high as 30 mph.

    Low: 48 °F

    Chance
    Showers then
    Mostly Cloudy

  • Monday

    Monday: Mostly cloudy, with a high near 57. North northeast wind 10 to 15 mph, with gusts as high as 30 mph.

    High: 57 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 49. North northeast wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 49 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 59. East northeast wind 5 to 10 mph.

    High: 59 °F

    Partly Sunny

Detailed Forecast

Today
Sunny, with a high near 77. West wind around 5 mph becoming calm in the morning.
Tonight
Mostly clear, with a low around 49. East southeast wind around 5 mph becoming calm.
Saturday
A 20 percent chance of showers after noon. Partly sunny, with a high near 69. Northeast wind 5 to 15 mph becoming southeast in the afternoon. Winds could gust as high as 25 mph.
Saturday Night
Showers. Low around 54. East southeast wind 10 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 80%.
Sunday
Showers and possibly a thunderstorm. High near 67. East southeast wind around 10 mph becoming north in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 90%.
Sunday Night
A 30 percent chance of showers before midnight. Mostly cloudy, with a low around 48. North northeast wind 10 to 15 mph, with gusts as high as 30 mph.
Monday
Mostly cloudy, with a high near 57. North northeast wind 10 to 15 mph, with gusts as high as 30 mph.
Monday Night
Mostly cloudy, with a low around 49. North northeast wind 5 to 10 mph, with gusts as high as 20 mph.
Tuesday
Partly sunny, with a high near 59. East northeast wind 5 to 10 mph.
Tuesday Night
Mostly cloudy, with a low around 52.
Wednesday
A 20 percent chance of showers. Mostly cloudy, with a high near 64.
Wednesday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 59.
Thursday
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 69.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Mountain City TX
 30.04°N 97.89°W (Elev. 837 ft)
Last Update:
8:14 am CST Nov 13, 2026
Forecast Valid:
8am CST Nov 13, 2026-6pm CST Nov 19, 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