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.

Mostly Cloudy

87°F

31°C

Humidity 80%
Wind Speed SE 12 mph
Barometer 30.01 in (1015.6 mb)
Dewpoint 80°F (27°C)
Visibility 10.00 mi
Heat Index103°F (39°C)
Last update 3 Jul 11:56 am CDT
Extended Forecast for

Mountain City TX

  • This Afternoon

    This Afternoon: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 87. South southeast wind around 10 mph, with gusts as high as 20 mph. New rainfall amounts between a quarter and half of an inch possible.

    High: 87 °F

    Chance
    T-storms

  • Tonight

    Tonight: A chance of showers and thunderstorms before 10pm, then a slight chance of showers. Mostly cloudy, with a low around 75. South wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.

    Low: 75 °F

    Chance
    T-storms then
    Slight Chance
    Showers

  • Independence Day

    Independence Day: A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 89. South wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.

    High: 89 °F

    Chance
    Showers then
    Slight Chance
    T-storms

  • Friday Night

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

    Low: 73 °F

    Mostly Cloudy

  • Saturday

    Saturday: A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 89. South wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.

    High: 89 °F

    Slight Chance
    Showers then
    Chance
    T-storms

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 72. South southeast wind 5 to 10 mph.

    Low: 72 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 93. South wind around 5 mph.

    High: 93 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 71. Southeast wind around 5 mph becoming south southwest after midnight.

    Low: 71 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 94. Calm wind becoming south around 5 mph in the morning.

    High: 94 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 87. South southeast wind around 10 mph, with gusts as high as 20 mph. New rainfall amounts between a quarter and half of an inch possible.
Tonight
A chance of showers and thunderstorms before 10pm, then a slight chance of showers. Mostly cloudy, with a low around 75. South wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.
Independence Day
A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 89. South wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.
Friday Night
Mostly cloudy, with a low around 73. South wind 5 to 10 mph, with gusts as high as 20 mph.
Saturday
A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 89. South wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.
Saturday Night
Mostly cloudy, with a low around 72. South southeast wind 5 to 10 mph.
Sunday
Partly sunny, with a high near 93. South wind around 5 mph.
Sunday Night
Partly cloudy, with a low around 71. Southeast wind around 5 mph becoming south southwest after midnight.
Monday
Mostly sunny, with a high near 94. Calm wind becoming south around 5 mph in the morning.
Monday Night
Mostly clear, with a low around 71.
Tuesday
Sunny, with a high near 96.
Tuesday Night
Mostly clear, with a low around 73.
Wednesday
Sunny, with a high near 98.
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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:
12:31 pm CDT Jul 3, 2025
Forecast Valid:
12pm CDT Jul 3, 2025-6pm CDT Jul 9, 2025
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation