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

81°F

27°C

Humidity 22%
Wind Speed S 16 G 20 mph
Barometer 29.91 in (1012.6 mb)
Dewpoint 39°F (4°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 13 Mar 5:56 pm CDT
Extended Forecast for

4 Miles WNW San Marcos TX

  • Tonight

    Tonight: Mostly clear, with a low around 51. South wind 5 to 10 mph.

    Low: 51 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 83. South wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 83 °F

    Sunny

  • Saturday Night

    Saturday Night: Increasing clouds, with a low around 62. South southeast wind around 10 mph, with gusts as high as 20 mph.

    Low: 62 °F

    Increasing
    Clouds

  • Sunday

    Sunday: Cloudy, then gradually becoming mostly sunny, with a high near 91. South southwest wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 91 °F

    Decreasing
    Clouds

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 39. North wind 15 to 20 mph, with gusts as high as 35 mph.

    Low: 39 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 57. North wind 10 to 15 mph, with gusts as high as 30 mph.

    High: 57 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 36. North northeast wind around 5 mph becoming calm after midnight.

    Low: 36 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 67. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 67 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 45. South wind 5 to 10 mph.

    Low: 45 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 51. South wind 5 to 10 mph.
Saturday
Sunny, with a high near 83. South wind 5 to 10 mph, with gusts as high as 20 mph.
Saturday Night
Increasing clouds, with a low around 62. South southeast wind around 10 mph, with gusts as high as 20 mph.
Sunday
Cloudy, then gradually becoming mostly sunny, with a high near 91. South southwest wind 10 to 15 mph, with gusts as high as 25 mph.
Sunday Night
Mostly clear, with a low around 39. North wind 15 to 20 mph, with gusts as high as 35 mph.
Monday
Mostly sunny, with a high near 57. North wind 10 to 15 mph, with gusts as high as 30 mph.
Monday Night
Mostly cloudy, with a low around 36. North northeast wind around 5 mph becoming calm after midnight.
Tuesday
Sunny, with a high near 67. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Tuesday Night
Mostly clear, with a low around 45. South wind 5 to 10 mph.
Wednesday
Sunny, with a high near 77.
Wednesday Night
Mostly clear, with a low around 52.
Thursday
Sunny, with a high near 84.
Thursday Night
Clear, with a low around 55.
Friday
Sunny, with a high near 88.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles WNW San Marcos TX
 29.9°N 97.99°W (Elev. 850 ft)
Last Update:
5:32 pm CDT Mar 13, 2026
Forecast Valid:
6pm CDT Mar 13, 2026-6pm CDT Mar 20, 2026
 
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