Current conditions at
San Marcos, San Marcos Municipal Airport (KHYI)
Lat: 29.89°NLon: 97.86°WElev: 597ft.
Fair
84°F
29°C
| Humidity | 32% |
| Wind Speed | S 13 G 21 mph |
| Barometer | 30.14 in (1020.1 mb) |
| Dewpoint | 51°F (11°C) |
| Visibility | 10.00 mi |
| Heat Index | 82°F (28°C) |
| Last update | 19 Mar 3:56 pm CDT |
Extended Forecast for
San Marcos TX
Tonight
Low: 54 °F
Clear
Friday
High: 89 °F
Sunny
Friday Night
Low: 58 °F
Mostly Clear
Saturday
High: 92 °F
Sunny
Saturday Night
Low: 59 °F
Mostly Clear
Sunday
High: 93 °F
Sunny
Sunday Night
Low: 58 °F
Clear
Monday
High: 89 °F
Sunny
Monday Night
Low: 59 °F
Mostly Clear
Detailed Forecast
Tonight
Clear, with a low around 54. South wind 5 to 10 mph.
Friday
Sunny, with a high near 89. South southwest wind 5 to 10 mph, with gusts as high as 20 mph.
Friday Night
Mostly clear, with a low around 58. South wind 5 to 10 mph.
Saturday
Sunny, with a high near 92. South southwest wind 5 to 10 mph.
Saturday Night
Mostly clear, with a low around 59. South wind around 10 mph.
Sunday
Sunny, with a high near 93. South southwest wind 5 to 10 mph, with gusts as high as 20 mph.
Sunday Night
Clear, with a low around 58. South wind 5 to 10 mph.
Monday
Sunny, with a high near 89. South southwest wind around 5 mph.
Monday Night
Mostly clear, with a low around 59. South southeast wind around 5 mph.
Tuesday
Mostly sunny, with a high near 89.
Tuesday Night
Mostly clear, with a low around 60.
Wednesday
Mostly sunny, with a high near 90.
Wednesday Night
Mostly clear, with a low around 63.
Thursday
Mostly sunny, with a high near 90.
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)
2:42 pm CDT Mar 19, 2026
4pm CDT Mar 19, 2026-6pm CDT Mar 26, 2026
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