Current conditions at
San Marcos, San Marcos Municipal Airport (KHYI)
Lat: 29.89°NLon: 97.86°WElev: 597ft.
Fair
67°F
19°C
| Humidity | 68% |
| Wind Speed | SW 20 G 26 mph |
| Barometer | 29.80 in (1008.7 mb) |
| Dewpoint | 56°F (13°C) |
| Visibility | 10.00 mi |
| Last update | 25 Feb 9:56 am CST |
Extended Forecast for
3 Miles NNW San Marcos Municipal Airport TX
Today

High: 87 °F
Sunny
Tonight

Low: 57 °F
Mostly Clear
Thursday

High: 89 °F
Sunny
Thursday Night

Low: 57 °F
Mostly Clear
Friday

High: 82 °F
Sunny
Friday Night

Low: 54 °F
Mostly Clear
Saturday

High: 85 °F
Sunny
Saturday Night

Low: 56 °F
Partly Cloudy
Sunday

High: 85 °F
Mostly Sunny
Detailed Forecast
Today
Sunny, with a high near 87. South southwest wind 10 to 15 mph, with gusts as high as 30 mph.
Tonight
Mostly clear, with a low around 57. South southwest wind around 10 mph.
Thursday
Sunny, with a high near 89. South southwest wind around 10 mph becoming north northeast in the afternoon. Winds could gust as high as 20 mph.
Thursday Night
Mostly clear, with a low around 57. North northeast wind 5 to 10 mph, with gusts as high as 20 mph.
Friday
Sunny, with a high near 82. East wind around 5 mph.
Friday Night
Mostly clear, with a low around 54. East wind around 5 mph becoming calm.
Saturday
Sunny, with a high near 85. Light south wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 20 mph.
Saturday Night
Partly cloudy, with a low around 56. South wind 5 to 10 mph.
Sunday
Mostly sunny, with a high near 85. South wind 5 to 15 mph, with gusts as high as 20 mph.
Sunday Night
Partly cloudy, with a low around 59.
Monday
Mostly sunny, with a high near 85.
Monday Night
Partly cloudy, with a low around 58.
Tuesday
Partly sunny, with a high near 80.
Additional Forecasts and Information
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ABOUT THIS FORECAST
Point Forecast:
3 Miles NNW San Marcos Municipal Airport TX
29.95°N 97.89°W (Elev. 646 ft)
29.95°N 97.89°W (Elev. 646 ft)
5:44 am CST Feb 25, 2026
10am CST Feb 25, 2026-6pm CST Mar 3, 2026


