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.

Partly Cloudy

27°C

81°F

Humidity 79%
Wind Speed SE 24 G 35 km/h
Barometer 1014.1 mb (29.97 in)
Dewpoint 23°C (74°F)
Visibility 16 km
Heat Index30°C (86°F)
Last update 14 Oct 8:56 pm CDT
Extended Forecast for

Mountain City TX

  • Tonight

    Tonight: Partly cloudy, with a low around 20. South southeast wind 10 to 20 km/h, with gusts as high as 40 km/h.

    Low: 20 °C

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 32. South southeast wind 10 to 15 km/h.

    High: 32 °C

    Mostly Sunny

  • Thursday Night

    Thursday Night: A 30 percent chance of showers, mainly after 4am. Partly cloudy, with a low around 17. Calm wind becoming north 5 to 10 km/h after midnight.

    Low: 17 °C

    Partly Cloudy
    then Chance
    Showers

  • Friday

    Friday: A 30 percent chance of showers before 7am. Partly sunny, with a high near 22. North wind around 35 km/h, with gusts as high as 60 km/h.

    High: 22 °C

    Chance
    Showers then
    Partly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 10. North wind 25 to 30 km/h, with gusts as high as 60 km/h.

    Low: 10 °C

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 21. North wind 25 to 30 km/h decreasing to 20 to 25 km/h in the afternoon. Winds could gust as high as 50 km/h.

    High: 21 °C

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 9. North northeast wind 5 to 10 km/h.

    Low: 9 °C

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 23. North wind 5 to 10 km/h becoming east northeast in the afternoon.

    High: 23 °C

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 11. Calm wind.

    Low: 11 °C

    Mostly Clear

Detailed Forecast

Tonight
Partly cloudy, with a low around 20. South southeast wind 10 to 20 km/h, with gusts as high as 40 km/h.
Thursday
Mostly sunny, with a high near 32. South southeast wind 10 to 15 km/h.
Thursday Night
A 30 percent chance of showers, mainly after 4am. Partly cloudy, with a low around 17. Calm wind becoming north 5 to 10 km/h after midnight.
Friday
A 30 percent chance of showers before 7am. Partly sunny, with a high near 22. North wind around 35 km/h, with gusts as high as 60 km/h.
Friday Night
Partly cloudy, with a low around 10. North wind 25 to 30 km/h, with gusts as high as 60 km/h.
Saturday
Sunny, with a high near 21. North wind 25 to 30 km/h decreasing to 20 to 25 km/h in the afternoon. Winds could gust as high as 50 km/h.
Saturday Night
Mostly clear, with a low around 9. North northeast wind 5 to 10 km/h.
Sunday
Sunny, with a high near 23. North wind 5 to 10 km/h becoming east northeast in the afternoon.
Sunday Night
Mostly clear, with a low around 11. Calm wind.
Monday
Mostly sunny, with a high near 26.
Monday Night
Partly cloudy, with a low around 15.
Tuesday
A 20 percent chance of showers. Partly sunny, with a high near 28.
Tuesday Night
Mostly cloudy, with a low around 18.
Wednesday
A 30 percent chance of showers. Mostly sunny, with a high near 31.
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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 m)
Last Update:
6:42 pm CDT Oct 14, 2026
Forecast Valid:
9pm CDT Oct 14, 2026-6pm CDT Oct 21, 2026
 
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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