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.

Overcast

74°F

23°C

Humidity 74%
Wind Speed NE 12 mph
Barometer 29.85 in (1010.1 mb)
Dewpoint 65°F (18°C)
Visibility 10.00 mi
Last update 30 Apr 5:56 pm CDT
Extended Forecast for

Mountain City TX

Flood Watch April 30, 09:00pm until May 1, 09:00pm
Click here for hazard details and duration
Flood Watch

  • Tonight

    Tonight: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1am. Low around 60. Northeast wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New rainfall amounts between three quarters and one inch possible.

    Low: 60 °F

    Chance
    T-storms then
    Showers

  • Friday

    Friday: Showers and possibly a thunderstorm. High near 63. Northeast wind 10 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.

    High: 63 °F

    Showers

  • Friday Night

    Friday Night: A 20 percent chance of showers before 1am. Cloudy, then gradually becoming partly cloudy, with a low around 51. North wind 10 to 20 mph, with gusts as high as 35 mph.

    Low: 51 °F

    Slight Chance
    Showers

  • Saturday

    Saturday: Sunny, with a high near 72. North wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 72 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 49. Northeast wind 5 to 10 mph becoming light and variable in the evening.

    Low: 49 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 77. Light and variable wind becoming south southeast 5 to 10 mph in the afternoon.

    High: 77 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 55. South southeast wind around 5 mph.

    Low: 55 °F

    Mostly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 83. South wind 5 to 15 mph, with gusts as high as 25 mph.

    High: 83 °F

    Partly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 65. South wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 65 °F

    Mostly Cloudy

Detailed Forecast

Tonight
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1am. Low around 60. Northeast wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New rainfall amounts between three quarters and one inch possible.
Friday
Showers and possibly a thunderstorm. High near 63. Northeast wind 10 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.
Friday Night
A 20 percent chance of showers before 1am. Cloudy, then gradually becoming partly cloudy, with a low around 51. North wind 10 to 20 mph, with gusts as high as 35 mph.
Saturday
Sunny, with a high near 72. North wind 10 to 15 mph, with gusts as high as 20 mph.
Saturday Night
Mostly clear, with a low around 49. Northeast wind 5 to 10 mph becoming light and variable in the evening.
Sunday
Mostly sunny, with a high near 77. Light and variable wind becoming south southeast 5 to 10 mph in the afternoon.
Sunday Night
Mostly cloudy, with a low around 55. South southeast wind around 5 mph.
Monday
Partly sunny, with a high near 83. South wind 5 to 15 mph, with gusts as high as 25 mph.
Monday Night
Mostly cloudy, with a low around 65. South wind 10 to 15 mph, with gusts as high as 20 mph.
Tuesday
Mostly cloudy, with a high near 90.
Tuesday Night
Mostly cloudy, with a low around 69.
Wednesday
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 88.
Wednesday Night
Mostly cloudy, with a low around 62.
Thursday
A 20 percent chance of showers. Partly sunny, with a high near 79.
Basemap Options
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mountain City TX
 30.02°N 97.89°W (Elev. 797 ft)
Last Update:
5:46 pm CDT Apr 30, 2026
Forecast Valid:
6pm CDT Apr 30, 2026-6pm CDT May 7, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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