Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Fair

73°F

23°C

Humidity 55%
Wind Speed SW 15 mph
Barometer 30.15 in (1020.5 mb)
Dewpoint 56°F (13°C)
Visibility 10.00 mi
Last update 20 Mar 10:56 am CDT
Extended Forecast for

San Marcos TX

  • Today

    Today: Sunny, with a high near 88. South southwest wind around 10 mph, with gusts as high as 20 mph.

    High: 88 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 58. South wind around 10 mph.

    Low: 58 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 92. South southwest wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 92 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 60. South wind around 10 mph, with gusts as high as 20 mph.

    Low: 60 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 91. South wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 91 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 58. South wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 58 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 88. South wind around 5 mph.

    High: 88 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 59. South southwest wind around 5 mph.

    Low: 59 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 88. South southwest wind 5 to 10 mph.

    High: 88 °F

    Mostly Sunny

Detailed Forecast

Today
Sunny, with a high near 88. South southwest wind around 10 mph, with gusts as high as 20 mph.
Tonight
Mostly clear, with a low around 58. South wind around 10 mph.
Saturday
Sunny, with a high near 92. South southwest wind 5 to 10 mph, with gusts as high as 20 mph.
Saturday Night
Mostly clear, with a low around 60. South wind around 10 mph, with gusts as high as 20 mph.
Sunday
Sunny, with a high near 91. South wind 10 to 15 mph, with gusts as high as 25 mph.
Sunday Night
Mostly clear, with a low around 58. South wind 5 to 10 mph, with gusts as high as 20 mph.
Monday
Sunny, with a high near 88. South wind around 5 mph.
Monday Night
Mostly clear, with a low around 59. South southwest wind around 5 mph.
Tuesday
Mostly sunny, with a high near 88. South southwest wind 5 to 10 mph.
Tuesday Night
Mostly clear, with a low around 61.
Wednesday
Mostly sunny, with a high near 90.
Wednesday Night
Mostly clear, with a low around 61.
Thursday
Sunny, with a high near 91.
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ABOUT THIS FORECAST

 
Point Forecast:
San Marcos TX
 29.88°N 97.94°W (Elev. 577 ft)
11:32 am CDT Mar 20, 2026
11am CDT Mar 20, 2026-6pm CDT Mar 26, 2026
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database