National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Thunderstorm

69°F

21°C

Humidity 100%
Wind Speed SW 14 G 24 mph
Barometer 29.88 in (1010.9 mb)
Dewpoint 69°F (21°C)
Visibility 7.00 mi
Last update 12 Jun 4:56 am CDT
Extended Forecast for

Mountain City TX

Flood Watch June 12, 05:13am until June 12, 07:00pm
Click here for hazard details and duration
Flood Watch
  •  
    Flood Watch June 12, 05:13am until June 12, 07:00pm

    NOW until 7:00pm Thu

    Flood Watch

  • Overnight

    Low: 70 °F

    Heavy Rain

  • Thursday

    Thursday: Showers and thunderstorms, mainly before 10am. Some of the storms could produce heavy rainfall. High near 86. South wind around 5 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 86 °F

    Heavy Rain
    then Chance
    T-storms

  • Thursday Night

    Thursday Night: A 10 percent chance of showers and thunderstorms before 7pm. Increasing clouds, with a low around 72. South wind around 5 mph.

    Low: 72 °F

    Slight Chance
    T-storms then
    Mostly Cloudy

  • Friday

    Friday: A 20 percent chance of showers and thunderstorms. Mostly cloudy, then gradually becoming sunny, with a high near 92. Heat index values as high as 107. South wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 92 °F

    Slight Chance
    T-storms

  • Friday Night

    Friday Night: Partly cloudy, with a low around 75. South southeast wind 5 to 10 mph.

    Low: 75 °F

    Partly Cloudy

  • Saturday

    Saturday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 93. South wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 93 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 74. South southeast wind 5 to 10 mph.

    Low: 74 °F

    Partly Cloudy

  • Sunday

    Sunday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 94. South wind 5 to 10 mph.

    High: 94 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

Detailed Forecast

Overnight
Showers and thunderstorms. Some of the storms could produce heavy rainfall. Low around 70. South southwest wind around 5 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday
Showers and thunderstorms, mainly before 10am. Some of the storms could produce heavy rainfall. High near 86. South wind around 5 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.
Thursday Night
A 10 percent chance of showers and thunderstorms before 7pm. Increasing clouds, with a low around 72. South wind around 5 mph.
Friday
A 20 percent chance of showers and thunderstorms. Mostly cloudy, then gradually becoming sunny, with a high near 92. Heat index values as high as 107. South wind 5 to 10 mph, with gusts as high as 20 mph.
Friday Night
Partly cloudy, with a low around 75. South southeast wind 5 to 10 mph.
Saturday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 93. South wind 5 to 10 mph, with gusts as high as 20 mph.
Saturday Night
Partly cloudy, with a low around 74. South southeast wind 5 to 10 mph.
Sunday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 94. South wind 5 to 10 mph.
Sunday Night
Partly cloudy, with a low around 74. South wind 5 to 10 mph.
Monday
Mostly sunny, with a high near 94.
Monday Night
Mostly clear, with a low around 74.
Tuesday
Mostly sunny, with a high near 95.
Tuesday Night
Partly cloudy, with a low around 74.
Wednesday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 95.
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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:
5:06 am CDT Jun 12, 2025
Forecast Valid:
5am CDT Jun 12, 2025-6pm CDT Jun 18, 2025
 
Forecast Discussion
 
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Additional Resources

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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