Current conditions at
San Marcos, San Marcos Municipal Airport (KHYI)
Lat: 29.89°NLon: 97.86°WElev: 597ft.
Fair
86°F
30°C
| Humidity | 27% |
| Wind Speed | S 16 mph |
| Barometer | 29.63 in (1002.8 mb) |
| Dewpoint | 48°F (9°C) |
| Visibility | 10.00 mi |
| Heat Index | 83°F (28°C) |
| Last update | 25 Feb 4:56 pm CST |
Extended Forecast for
3 Miles NNW San Marcos Municipal Airport TX
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: 56 °F
Mostly Clear
Saturday

High: 85 °F
Sunny
Saturday Night

Low: 56 °F
Partly Cloudy
Sunday

High: 85 °F
Mostly Sunny
Sunday Night

Low: 59 °F
Partly Cloudy
Detailed Forecast
Tonight
Mostly clear, with a low around 57. South wind 5 to 10 mph, with gusts as high as 20 mph.
Thursday
Sunny, with a high near 89. Light and variable wind becoming north northeast 10 to 15 mph in the morning. 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 56. 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. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Monday
Partly sunny, with a high near 80.
Monday Night
Mostly cloudy, with a low around 58.
Tuesday
Mostly cloudy, with a high near 80.
Tuesday Night
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 58.
Wednesday
A 40 percent chance of showers. Mostly cloudy, with a high near 81.
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)
5:28 pm CST Feb 25, 2026
5pm CST Feb 25, 2026-6pm CST Mar 4, 2026


