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.

Mostly Cloudy

64°F

18°C

Humidity 90%
Wind Speed N 5 mph
Barometer 29.92 in (1012.4 mb)
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Last update 11 Mar 9:56 am CDT
Extended Forecast for

5 Miles SW San Marcos TX

  • Today

    Today: A 20 percent chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 83. West southwest wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 83 °F

    Slight Chance
    T-storms

  • Tonight

    Tonight: Mostly clear, with a low around 45. North wind 10 to 20 mph, with gusts as high as 30 mph.

    Low: 45 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 67. North wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 67 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 43. East northeast wind around 5 mph becoming calm in the evening.

    Low: 43 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 78. South southwest wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 78 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 51. South wind around 5 mph.

    Low: 51 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 85. South wind 5 to 15 mph, with gusts as high as 20 mph.

    High: 85 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 61. South southeast wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 61 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 89. South southwest wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 89 °F

    Partly Sunny

Detailed Forecast

Today
A 20 percent chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 83. West southwest wind 5 to 10 mph, with gusts as high as 20 mph.
Tonight
Mostly clear, with a low around 45. North wind 10 to 20 mph, with gusts as high as 30 mph.
Thursday
Sunny, with a high near 67. North wind 10 to 15 mph, with gusts as high as 25 mph.
Thursday Night
Clear, with a low around 43. East northeast wind around 5 mph becoming calm in the evening.
Friday
Sunny, with a high near 78. South southwest wind 5 to 10 mph, with gusts as high as 20 mph.
Friday Night
Clear, with a low around 51. South wind around 5 mph.
Saturday
Sunny, with a high near 85. South wind 5 to 15 mph, with gusts as high as 20 mph.
Saturday Night
Partly cloudy, with a low around 61. South southeast wind 10 to 15 mph, with gusts as high as 20 mph.
Sunday
Partly sunny, with a high near 89. South southwest wind 10 to 15 mph, with gusts as high as 25 mph.
Sunday Night
Partly cloudy, with a low around 49.
Monday
Partly sunny, with a high near 64.
Monday Night
Mostly cloudy, with a low around 42.
Tuesday
Partly sunny, with a high near 72.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles SW San Marcos TX
 29.83°N 97.99°W (Elev. 676 ft)
Last Update:
7:44 am CDT Mar 11, 2026
Forecast Valid:
10am CDT Mar 11, 2026-6pm CDT Mar 17, 2026
 
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