Current conditions at
San Marcos, San Marcos Municipal Airport (KHYI)
Lat: 29.89°NLon: 97.86°WElev: 597ft.
Fair
56°F
13°C
| Humidity | 62% |
| Wind Speed | S 6 mph |
| Barometer | 30.25 in (1024.1 mb) |
| Dewpoint | 43°F (6°C) |
| Visibility | 10.00 mi |
| Last update | 18 Mar 9:56 am CDT |
Extended Forecast for
San Marcos TX
Today
High: 77 °F
Sunny
Tonight
Low: 51 °F
Mostly Clear
Thursday
High: 83 °F
Sunny
Thursday Night
Low: 54 °F
Clear
Friday
High: 89 °F
Sunny
Friday Night
Low: 57 °F
Clear
Saturday
High: 91 °F
Sunny
Saturday Night
Low: 59 °F
Clear
Sunday
High: 91 °F
Sunny
Detailed Forecast
Today
Sunny, with a high near 77. South wind 5 to 10 mph, with gusts as high as 20 mph.
Tonight
Mostly clear, with a low around 51. South southeast wind around 5 mph becoming southwest after midnight.
Thursday
Sunny, with a high near 83. Southwest wind 5 to 10 mph.
Thursday Night
Clear, with a low around 54. South wind around 5 mph.
Friday
Sunny, with a high near 89. Southwest wind 5 to 10 mph.
Friday Night
Clear, with a low around 57. South wind around 5 mph.
Saturday
Sunny, with a high near 91. South southwest wind 5 to 10 mph.
Saturday Night
Clear, with a low around 59. South wind 5 to 10 mph.
Sunday
Sunny, with a high near 91. South wind 5 to 10 mph, with gusts as high as 20 mph.
Sunday Night
Clear, with a low around 58.
Monday
Sunny, with a high near 87.
Monday Night
Mostly clear, with a low around 57.
Tuesday
Mostly sunny, with a high near 86.
Additional Forecasts and Information
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Point Forecast:
San Marcos TX
29.88°N 97.94°W (Elev. 577 ft)
29.88°N 97.94°W (Elev. 577 ft)
6:42 am CDT Mar 18, 2026
10am CDT Mar 18, 2026-6pm CDT Mar 24, 2026
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