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

74°F

23°C

Humidity 94%
Wind Speed Calm
Barometer 30.02 in (1015.6 mb)
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Last update 1 Sep 6:56 am CDT
Extended Forecast for

Fentress TX

  • Today

    Today: A 20 percent chance of showers and thunderstorms after 1pm. Increasing clouds, with a high near 98. Heat index values as high as 104. Calm wind becoming east around 5 mph in the afternoon.

    High: 98 °F

    Sunny then
    Slight Chance
    T-storms

  • Tonight

    Tonight: Partly cloudy, with a low around 77. East wind around 5 mph becoming calm after midnight.

    Low: 77 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny and hot, with a high near 100. Heat index values as high as 105. Calm wind becoming southwest around 5 mph.

    High: 100 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 76. South wind 5 to 10 mph. Chance of precipitation is 30%.

    Low: 76 °F

    Chance
    Showers

  • Thursday

    Thursday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 98. South wind 5 to 10 mph.

    High: 98 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am, then a chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 75. South southeast wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.

    Low: 75 °F

    Slight Chance
    T-storms then
    Chance
    Showers

  • Friday

    Friday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 98. Calm wind becoming southeast around 5 mph in the morning.

    High: 98 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Friday Night

    Friday Night: Mostly clear, with a low around 74. Southeast wind 5 to 10 mph becoming light south after midnight.

    Low: 74 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 97. Calm wind becoming southeast around 5 mph in the afternoon.

    High: 97 °F

    Mostly Sunny

Detailed Forecast

Today
A 20 percent chance of showers and thunderstorms after 1pm. Increasing clouds, with a high near 98. Heat index values as high as 104. Calm wind becoming east around 5 mph in the afternoon.
Tonight
Partly cloudy, with a low around 77. East wind around 5 mph becoming calm after midnight.
Wednesday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny and hot, with a high near 100. Heat index values as high as 105. Calm wind becoming southwest around 5 mph.
Wednesday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 76. South wind 5 to 10 mph. Chance of precipitation is 30%.
Thursday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 98. South wind 5 to 10 mph.
Thursday Night
A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am, then a chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 75. South southeast wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.
Friday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 98. Calm wind becoming southeast around 5 mph in the morning.
Friday Night
Mostly clear, with a low around 74. Southeast wind 5 to 10 mph becoming light south after midnight.
Saturday
Mostly sunny, with a high near 97. Calm wind becoming southeast around 5 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 74.
Sunday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 97.
Sunday Night
Mostly clear, with a low around 75.
Labor Day
Sunny, with a high near 98.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Fentress TX
 29.75°N 97.78°W (Elev. 436 ft)
Last Update:
6:42 am CDT Sep 1, 2026
Forecast Valid:
7am CDT Sep 1, 2026-6pm CDT Sep 7, 2026
 
Forecast Discussion
 
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Additional Resources

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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