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.

Fair

85°F

29°C

Humidity 68%
Wind Speed SE 8 mph
Barometer 29.88 in (1011.2 mb)
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index92°F (33°C)
Last update 3 Sep 8:56 pm CDT
Extended Forecast for

Fentress TX

  • Tonight

    Tonight: Increasing clouds, with a low around 77. South wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 77 °F

    Increasing
    Clouds

  • Friday

    Friday: A 30 percent chance of showers and thunderstorms, mainly between 1pm and 4pm. Partly sunny, with a high near 95. Heat index values as high as 102. South southeast wind around 5 mph.

    High: 95 °F

    Chance
    T-storms

  • Friday Night

    Friday Night: A 10 percent chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 75. East southeast wind 5 to 10 mph becoming light south after midnight.

    Low: 75 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Saturday

    Saturday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 97. Heat index values as high as 105. Calm wind becoming southeast around 5 mph in the afternoon.

    High: 97 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 75. Southeast wind around 5 mph becoming calm in the evening.

    Low: 75 °F

    Partly Cloudy

  • Sunday

    Sunday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 97. Calm wind becoming east southeast around 5 mph in the afternoon.

    High: 97 °F

    Sunny then
    Slight Chance
    T-storms

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 76. Southeast wind around 5 mph becoming calm in the evening.

    Low: 76 °F

    Mostly Clear

  • Labor Day

    Labor Day: Sunny, with a high near 97. Calm wind becoming southeast around 5 mph in the afternoon.

    High: 97 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 76. Southeast wind 5 to 10 mph becoming light south after midnight.

    Low: 76 °F

    Mostly Clear

Detailed Forecast

Tonight
Increasing clouds, with a low around 77. South wind 5 to 10 mph, with gusts as high as 20 mph.
Friday
A 30 percent chance of showers and thunderstorms, mainly between 1pm and 4pm. Partly sunny, with a high near 95. Heat index values as high as 102. South southeast wind around 5 mph.
Friday Night
A 10 percent chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 75. East southeast wind 5 to 10 mph becoming light south after midnight.
Saturday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 97. Heat index values as high as 105. Calm wind becoming southeast around 5 mph in the afternoon.
Saturday Night
Partly cloudy, with a low around 75. Southeast wind around 5 mph becoming calm in the evening.
Sunday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 97. Calm wind becoming east southeast around 5 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 76. Southeast wind around 5 mph becoming calm in the evening.
Labor Day
Sunny, with a high near 97. Calm wind becoming southeast around 5 mph in the afternoon.
Monday Night
Mostly clear, with a low around 76. Southeast wind 5 to 10 mph becoming light south after midnight.
Tuesday
A 30 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 98.
Tuesday Night
Partly cloudy, with a low around 75.
Wednesday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 96.
Wednesday Night
Partly cloudy, with a low around 74.
Thursday
Mostly sunny, with a high near 96.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Fentress TX
 29.75°N 97.78°W (Elev. 436 ft)
Last Update:
7:42 pm CDT Sep 3, 2026
Forecast Valid:
9pm CDT Sep 3, 2026-6pm CDT Sep 10, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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