Current conditions at
San Marcos, San Marcos Municipal Airport (KHYI)
Lat: 29.89°NLon: 97.86°WElev: 597ft.
Fair
56°F
13°C
| Humidity | 15% |
| Wind Speed | SE 8 mph |
| Barometer | 30.37 in (1028.3 mb) |
| Dewpoint | 9°F (-13°C) |
| Visibility | 10.00 mi |
| Last update | 17 Mar 11:56 am CDT |
Extended Forecast for
San Marcos TX
This Afternoon
High: 66 °F
Sunny
Tonight
Low: 43 °F
Mostly Clear
Wednesday
High: 79 °F
Sunny
Wednesday Night
Low: 51 °F
Mostly Clear
Thursday
High: 85 °F
Sunny
Thursday Night
Low: 55 °F
Clear
Friday
High: 92 °F
Sunny
Friday Night
Low: 58 °F
Clear
Saturday
High: 94 °F
Sunny
Detailed Forecast
This Afternoon
Sunny, with a high near 66. South wind 5 to 10 mph, with gusts as high as 20 mph.
Tonight
Mostly clear, with a low around 43. South wind 5 to 10 mph, with gusts as high as 20 mph.
Wednesday
Sunny, with a high near 79. South 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 85. Southwest wind 5 to 10 mph.
Thursday Night
Clear, with a low around 55. South wind around 5 mph.
Friday
Sunny, with a high near 92. Southwest wind 5 to 10 mph.
Friday Night
Clear, with a low around 58. 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 59.
Sunday
Sunny, with a high near 93.
Sunday Night
Mostly clear, with a low around 59.
Monday
Mostly sunny, with a high near 90.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
San Marcos TX
29.9°N 97.91°W (Elev. 640 ft)
29.9°N 97.91°W (Elev. 640 ft)
11:32 am CDT Mar 17, 2026
12pm CDT Mar 17, 2026-6pm CDT Mar 23, 2026
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