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Current conditions at
San Marcos, San Marcos Municipal Airport (KHYI)
Lat: 29.89°NLon: 97.86°WElev: 597ft.
Fair
51°F
11°C
| Humidity | 77% |
| Wind Speed | N 5 mph |
| Barometer | 30.25 in (1024.0 mb) |
| Dewpoint | 44°F (7°C) |
| Visibility | 10.00 mi |
| Wind Chill | 49°F (9°C) |
| Last update | 19 Oct 5:56 am CDT |
Extended Forecast for
San Marcos TX
Today
High: 79 °F
Mostly Sunny
Tonight
Low: 58 °F
Partly Cloudy
Tuesday
High: 83 °F
Sunny
Tuesday Night
Low: 58 °F
Mostly Clear
Wednesday
High: 85 °F
Sunny
Wednesday Night
Low: 60 °F
Mostly Clear
Thursday
High: 87 °F
Sunny
Thursday Night
Low: 59 °F
Mostly Clear
Friday
High: 87 °F
Sunny
Detailed Forecast
Today
Mostly sunny, with a high near 79. Calm wind becoming east around 5 mph.
Tonight
Partly cloudy, with a low around 58. Calm wind.
Tuesday
Sunny, with a high near 83. Calm wind becoming east northeast around 5 mph in the afternoon.
Tuesday Night
Mostly clear, with a low around 58. East northeast wind around 5 mph becoming calm.
Wednesday
Sunny, with a high near 85. East northeast wind around 5 mph.
Wednesday Night
Mostly clear, with a low around 60. East wind around 5 mph becoming calm.
Thursday
Sunny, with a high near 87. Calm wind becoming east southeast around 5 mph.
Thursday Night
Mostly clear, with a low around 59. East wind around 5 mph becoming calm.
Friday
Sunny, with a high near 87. Light and variable wind becoming southeast 5 to 10 mph in the afternoon.
Friday Night
Mostly clear, with a low around 63.
Saturday
Mostly sunny, with a high near 87.
Saturday Night
Partly cloudy, with a low around 64.
Sunday
Partly sunny, with a high near 86.
Additional Forecasts and Information
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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)
5:32 am CDT Oct 19, 2026
6am CDT Oct 19, 2026-6pm CDT Oct 25, 2026
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