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

57°F

14°C

Humidity 96%
Wind Speed S 7 mph
Barometer 30.00 in (1015.3 mb)
Dewpoint 56°F (13°C)
Visibility 10.00 mi
Last update 21 Mar 5:56 am CDT
Extended Forecast for

3 Miles NNW San Marcos Municipal Airport TX

  • Today

    Today: Sunny, with a high near 92. South wind 5 to 15 mph, with gusts as high as 20 mph.

    High: 92 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 59. South wind around 10 mph, with gusts as high as 20 mph.

    Low: 59 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 92. South southwest wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 92 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 57. South wind 5 to 15 mph, with gusts as high as 20 mph.

    Low: 57 °F

    Mostly Clear

  • Monday

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

    High: 88 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 60. Southeast wind around 5 mph.

    Low: 60 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 89. South wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 89 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 62. South wind around 10 mph.

    Low: 62 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 91. South wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 91 °F

    Mostly Sunny

Detailed Forecast

Today
Sunny, with a high near 92. South wind 5 to 15 mph, with gusts as high as 20 mph.
Tonight
Mostly clear, with a low around 59. South wind around 10 mph, with gusts as high as 20 mph.
Sunday
Sunny, with a high near 92. South southwest wind 10 to 15 mph, with gusts as high as 25 mph.
Sunday Night
Mostly clear, with a low around 57. South wind 5 to 15 mph, with gusts as high as 20 mph.
Monday
Sunny, with a high near 88. South wind around 5 mph.
Monday Night
Partly cloudy, with a low around 60. Southeast wind around 5 mph.
Tuesday
Mostly sunny, with a high near 89. South wind 5 to 10 mph, with gusts as high as 20 mph.
Tuesday Night
Mostly clear, with a low around 62. South wind around 10 mph.
Wednesday
Mostly sunny, with a high near 91. South wind 5 to 10 mph, with gusts as high as 20 mph.
Wednesday Night
Mostly clear, with a low around 62.
Thursday
Mostly sunny, with a high near 92.
Thursday Night
Mostly clear, with a low around 60.
Friday
Mostly sunny, with a high near 90.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NNW San Marcos Municipal Airport TX
 29.95°N 97.89°W (Elev. 646 ft)
Last Update:
5:32 am CDT Mar 21, 2026
Forecast Valid:
6am CDT Mar 21, 2026-6pm CDT Mar 27, 2026
 
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Additional Resources

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