Current conditions at
San Marcos, San Marcos Municipal Airport (KHYI)
Lat: 29.89°NLon: 97.86°WElev: 597ft.
Partly Cloudy
83°F
28°C
| Humidity | 74% |
| Wind Speed | SW 9 mph |
| Barometer | 30.07 in (1017.3 mb) |
| Dewpoint | 74°F (23°C) |
| Visibility | 10.00 mi |
| Heat Index | 90°F (32°C) |
| Last update | 4 Jul 9:56 am CDT |
Extended Forecast for
San Marcos TX
Independence Day
High: 95 °F
Mostly Sunny
Tonight
Low: 75 °F
Increasing
CloudsSunday
High: 95 °F
Decreasing
CloudsSunday Night
Low: 75 °F
Partly Cloudy
Monday
High: 95 °F
Mostly Sunny
Monday Night
Low: 75 °F
Partly Cloudy
Tuesday
High: 96 °F
Mostly Sunny
Tuesday Night
Low: 75 °F
Mostly Clear
Wednesday
High: 96 °F
Sunny
Detailed Forecast
Independence Day
Mostly sunny, with a high near 95. Heat index values as high as 100. South wind around 5 mph.
Tonight
Increasing clouds, with a low around 75. South southeast wind 5 to 10 mph.
Sunday
Mostly cloudy, then gradually becoming sunny, with a high near 95. South southwest wind around 5 mph.
Sunday Night
Partly cloudy, with a low around 75. South southeast wind around 5 mph.
Monday
Mostly sunny, with a high near 95. South southwest wind around 5 mph.
Monday Night
Partly cloudy, with a low around 75. South southeast wind around 5 mph.
Tuesday
Mostly sunny, with a high near 96. South wind around 5 mph.
Tuesday Night
Mostly clear, with a low around 75. South southeast wind around 5 mph.
Wednesday
Sunny, with a high near 96. South southwest wind 5 to 10 mph.
Wednesday Night
Mostly clear, with a low around 76.
Thursday
Sunny, with a high near 97.
Thursday Night
Mostly clear, with a low around 76.
Friday
Mostly sunny, with a high near 96.
Additional Forecasts and Information
Basemap Options
Click map to change the forecast location
Loading map...
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)
6:46 am CDT Jul 4, 2026
10am CDT Jul 4, 2026-6pm CDT Jul 10, 2026
Additional Resources
Radar & Satellite Image
Hourly Weather Forecast
