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

78°F

26°C

Humidity 58%
Wind Speed SE 14 mph
Barometer 29.95 in (1013.4 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 4 Mar 6:56 pm CST
Extended Forecast for

2 Miles SW Hays TX

  • Tonight

    Tonight: A slight chance of showers and thunderstorms before midnight, then a slight chance of showers and thunderstorms after 3am. Increasing clouds, with a low around 65. South wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.

    Low: 65 °F

    Slight Chance
    T-storms

  • Thursday

    Thursday: A chance of showers and thunderstorms before noon, then a slight chance of showers. Cloudy, then gradually becoming mostly sunny, with a high near 84. South southeast wind 10 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 30%.

    High: 84 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: A 30 percent chance of showers and thunderstorms after midnight. Increasing clouds, with a low around 65. South southeast wind 10 to 15 mph, with gusts as high as 30 mph.

    Low: 65 °F

    Partly Cloudy
    then Chance
    Showers

  • Friday

    Friday: Showers likely, with thunderstorms also possible after 3pm. Mostly cloudy, with a high near 83. South wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 70%.

    High: 83 °F

    Chance
    Showers then
    Showers
    Likely

  • Friday Night

    Friday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 66. South southeast wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.

    Low: 66 °F

    Chance
    T-storms then
    Showers
    Likely

  • Saturday

    Saturday: Showers likely and possibly a thunderstorm before 9am, then showers likely between 9am and noon, then showers and possibly a thunderstorm after noon. High near 82. South southeast wind around 10 mph becoming east northeast in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 90%.

    High: 82 °F

    Showers
    Likely then
    Showers

  • Saturday Night

    Saturday Night: Showers and possibly a thunderstorm. Low around 57. North northeast wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 90%.

    Low: 57 °F

    Showers

  • Sunday

    Sunday: Showers and possibly a thunderstorm. High near 72. North northeast wind 5 to 10 mph. Chance of precipitation is 80%.

    High: 72 °F

    Showers

  • Sunday Night

    Sunday Night: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 61. East northeast wind around 5 mph.

    Low: 61 °F

    Chance
    Showers

Detailed Forecast

Tonight
A slight chance of showers and thunderstorms before midnight, then a slight chance of showers and thunderstorms after 3am. Increasing clouds, with a low around 65. South wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Thursday
A chance of showers and thunderstorms before noon, then a slight chance of showers. Cloudy, then gradually becoming mostly sunny, with a high near 84. South southeast wind 10 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 30%.
Thursday Night
A 30 percent chance of showers and thunderstorms after midnight. Increasing clouds, with a low around 65. South southeast wind 10 to 15 mph, with gusts as high as 30 mph.
Friday
Showers likely, with thunderstorms also possible after 3pm. Mostly cloudy, with a high near 83. South wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 70%.
Friday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 66. South southeast wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.
Saturday
Showers likely and possibly a thunderstorm before 9am, then showers likely between 9am and noon, then showers and possibly a thunderstorm after noon. High near 82. South southeast wind around 10 mph becoming east northeast in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 90%.
Saturday Night
Showers and possibly a thunderstorm. Low around 57. North northeast wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 90%.
Sunday
Showers and possibly a thunderstorm. High near 72. North northeast wind 5 to 10 mph. Chance of precipitation is 80%.
Sunday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 61. East northeast wind around 5 mph.
Monday
A 50 percent chance of showers. Mostly cloudy, with a high near 81.
Monday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 64.
Tuesday
Showers likely. Mostly cloudy, with a high near 80. Chance of precipitation is 60%.
Tuesday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 56.
Wednesday
A 20 percent chance of showers. Sunny, with a high near 77.
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SW Hays TX
 30.09°N 97.89°W (Elev. 801 ft)
Last Update:
5:44 pm CST Mar 4, 2026
Forecast Valid:
7pm CST Mar 4, 2026-6pm CDT Mar 11, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation