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

77°F

25°C

Humidity 100%
Wind Speed S 9 mph
Barometer 30.06 in (1017.1 mb)
Dewpoint 77°F (25°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 14 Jul 5:56 am CDT
Extended Forecast for

Mountain City TX

  • Today

    Today: A slight chance of showers before 10am, then a slight chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 92. Heat index values as high as 102. South wind 5 to 10 mph. Chance of precipitation is 20%.

    High: 92 °F

    Slight Chance
    Showers then
    Slight Chance
    T-storms

  • Tonight

    Tonight: Mostly cloudy, with a low around 74. South southeast wind 5 to 10 mph.

    Low: 74 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 93. Heat index values as high as 102. South wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 93 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 73. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 73 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 94. South wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 94 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 72. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 72 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 93. South wind 5 to 10 mph.

    High: 93 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 72. South southeast wind around 5 mph.

    Low: 72 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 93. South southeast wind around 5 mph.

    High: 93 °F

    Mostly Sunny

Detailed Forecast

Today
A slight chance of showers before 10am, then a slight chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 92. Heat index values as high as 102. South wind 5 to 10 mph. Chance of precipitation is 20%.
Tonight
Mostly cloudy, with a low around 74. South southeast wind 5 to 10 mph.
Tuesday
Partly sunny, with a high near 93. Heat index values as high as 102. South wind 5 to 10 mph, with gusts as high as 20 mph.
Tuesday Night
Partly cloudy, with a low around 73. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Wednesday
Mostly sunny, with a high near 94. South wind 5 to 10 mph, with gusts as high as 20 mph.
Wednesday Night
Mostly clear, with a low around 72. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Thursday
Mostly sunny, with a high near 93. South wind 5 to 10 mph.
Thursday Night
Partly cloudy, with a low around 72. South southeast wind around 5 mph.
Friday
Mostly sunny, with a high near 93. South southeast wind around 5 mph.
Friday Night
Mostly cloudy, with a low around 74.
Saturday
Mostly sunny, with a high near 94.
Saturday Night
Partly cloudy, with a low around 74.
Sunday
Mostly sunny, with a high near 95.
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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:
6:10 am CDT Jul 14, 2025
Forecast Valid:
6am CDT Jul 14, 2025-6pm CDT Jul 20, 2025
 
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Additional Resources

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Chance of Precipitation