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Current conditions at
San Marcos, San Marcos Municipal Airport (KHYI)
Lat: 29.89°NLon: 97.86°WElev: 597ft.
Fair
81°F
27°C
| Humidity | 74% |
| Wind Speed | S 10 mph |
| Barometer | 30.05 in (1016.9 mb) |
| Dewpoint | 72°F (22°C) |
| Visibility | 10.00 mi |
| Heat Index | 85°F (29°C) |
| Last update | 24 Jul 10:56 pm CDT |
Extended Forecast for
San Marcos Municipal Airport TX
Tonight

Low: 75 °F
Partly Cloudy
Saturday

High: 94 °F
Mostly Sunny
Saturday Night

Low: 73 °F
Partly Cloudy
Sunday

High: 95 °F
Sunny
Sunday Night

Low: 74 °F
Clear
Monday

High: 97 °F
Sunny
Monday Night

Low: 74 °F
Mostly Clear
Tuesday

High: 99 °F
Hot
Tuesday Night

Low: 75 °F
Mostly Clear
Detailed Forecast
Tonight
Partly cloudy, with a low around 75. South wind 5 to 10 mph.
Saturday
Mostly sunny, with a high near 94. South wind around 5 mph.
Saturday Night
Partly cloudy, with a low around 73. South wind 5 to 10 mph.
Sunday
Sunny, with a high near 95. Heat index values as high as 102. South southwest wind around 5 mph.
Sunday Night
Clear, with a low around 74. South wind around 5 mph.
Monday
Sunny, with a high near 97. South wind 5 to 10 mph.
Monday Night
Mostly clear, with a low around 74. South wind 5 to 10 mph, with gusts as high as 20 mph.
Tuesday
Sunny and hot, with a high near 99. South wind 5 to 10 mph.
Tuesday Night
Mostly clear, with a low around 75. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Wednesday
Sunny and hot, with a high near 99.
Wednesday Night
Mostly clear, with a low around 76.
Thursday
Mostly sunny and hot, with a high near 100.
Thursday Night
Mostly clear, with a low around 77.
Friday
Mostly sunny and hot, with a high near 100.
Additional Forecasts and Information
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ABOUT THIS FORECAST
Point Forecast:
San Marcos Municipal Airport TX
29.88°N 97.86°W (Elev. 600 ft)
29.88°N 97.86°W (Elev. 600 ft)
11:32 pm CDT Jul 24, 2026
11pm CDT Jul 24, 2026-6pm CDT Jul 31, 2026


