Current conditions at
San Marcos, San Marcos Municipal Airport (KHYI)
Lat: 29.89°NLon: 97.86°WElev: 597ft.
Fair
64°F
18°C
| Humidity | 12% |
| Wind Speed | S 15 G 20 mph |
| Barometer | 30.31 in (1026.2 mb) |
| Dewpoint | 10°F (-12°C) |
| Visibility | 10.00 mi |
| Last update | 17 Mar 1:56 pm CDT |
Extended Forecast for
San Marcos TX
This Afternoon
High: 66 °F
Sunny
Tonight
Low: 43 °F
Mostly Clear
Wednesday
High: 78 °F
Sunny
Wednesday Night
Low: 51 °F
Mostly Clear
Thursday
High: 84 °F
Sunny
Thursday Night
Low: 56 °F
Clear
Friday
High: 92 °F
Sunny
Friday Night
Low: 59 °F
Clear
Saturday
High: 94 °F
Sunny
Detailed Forecast
This Afternoon
Sunny, with a high near 66. South wind around 10 mph, with gusts as high as 20 mph.
Tonight
Mostly clear, with a low around 43. South southeast wind 5 to 10 mph.
Wednesday
Sunny, with a high near 78. South southwest wind 5 to 10 mph, with gusts as high as 20 mph.
Wednesday Night
Mostly clear, with a low around 51. South wind around 5 mph.
Thursday
Sunny, with a high near 84. Southwest wind 5 to 10 mph.
Thursday Night
Clear, with a low around 56. South wind around 5 mph.
Friday
Sunny, with a high near 92. West southwest wind around 5 mph.
Friday Night
Clear, with a low around 59. South wind around 5 mph.
Saturday
Sunny, with a high near 94. South wind 5 to 10 mph.
Saturday Night
Clear, with a low around 61.
Sunday
Sunny, with a high near 92.
Sunday Night
Mostly clear, with a low around 60.
Monday
Sunny, with a high near 88.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
San Marcos TX
29.88°N 97.94°W (Elev. 577 ft)
29.88°N 97.94°W (Elev. 577 ft)
2:48 pm CDT Mar 17, 2026
2pm CDT Mar 17, 2026-6pm CDT Mar 23, 2026
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