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.

Overcast

75°F

24°C

Humidity 88%
Wind Speed N 15 G 22 mph
Barometer 30.11 in (1019.1 mb)
Dewpoint 71°F (22°C)
Visibility 9.00 mi
Last update 4 Oct 11:56 am CDT
Extended Forecast for

Mountain City TX

  • This Afternoon

    This Afternoon: Mostly cloudy, with a high near 80. North northeast wind around 15 mph, with gusts as high as 25 mph.

    High: 80 °F

    Mostly Cloudy

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming mostly clear, with a low around 68. North wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 68 °F

    Decreasing
    Clouds

  • Monday

    Monday: Sunny, with a high near 84. North northeast wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 84 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 64. North wind 5 to 10 mph.

    Low: 64 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 86. North wind 5 to 10 mph.

    High: 86 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 63. Northeast wind around 5 mph becoming calm.

    Low: 63 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 88. Northeast wind around 5 mph.

    High: 88 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 65. East northeast wind around 5 mph becoming calm in the evening.

    Low: 65 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 87. Northeast wind around 5 mph.

    High: 87 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Mostly cloudy, with a high near 80. North northeast wind around 15 mph, with gusts as high as 25 mph.
Tonight
Mostly cloudy, then gradually becoming mostly clear, with a low around 68. North wind 10 to 15 mph, with gusts as high as 25 mph.
Monday
Sunny, with a high near 84. North northeast wind 10 to 15 mph, with gusts as high as 25 mph.
Monday Night
Mostly clear, with a low around 64. North wind 5 to 10 mph.
Tuesday
Sunny, with a high near 86. North wind 5 to 10 mph.
Tuesday Night
Mostly clear, with a low around 63. Northeast wind around 5 mph becoming calm.
Wednesday
Sunny, with a high near 88. Northeast wind around 5 mph.
Wednesday Night
Mostly clear, with a low around 65. East northeast wind around 5 mph becoming calm in the evening.
Thursday
Mostly sunny, with a high near 87. Northeast wind around 5 mph.
Thursday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 66. Chance of precipitation is 20%.
Friday
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 85.
Friday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 65.
Saturday
A 20 percent chance of showers. Mostly sunny, with a high near 86.
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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:
11:32 am CDT Oct 4, 2026
Forecast Valid:
12pm CDT Oct 4, 2026-6pm CDT Oct 10, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation