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Current conditions at
San Marcos, San Marcos Municipal Airport (KHYI)
Lat: 29.89°NLon: 97.86°WElev: 597ft.
Fair
53°F
12°C
| Humidity | 74% |
| Wind Speed | N 5 mph |
| Barometer | 30.28 in (1025.1 mb) |
| Dewpoint | 45°F (7°C) |
| Visibility | 10.00 mi |
| Wind Chill | 52°F (11°C) |
| Last update | 6 Apr 2:56 am CDT |
Extended Forecast for
San Marcos TX
Overnight

Low: 50 °F
Partly Cloudy
Monday

High: 72 °F
Sunny
Monday Night

Low: 48 °F
Mostly Clear
Tuesday

High: 75 °F
Partly Sunny
Tuesday Night

Low: 55 °F
Partly Cloudy
Wednesday

High: 77 °F
Partly Sunny
Wednesday Night

Low: 61 °F
Mostly Cloudy
Thursday

High: 81 °F
Mostly Cloudy
Thursday Night

Low: 63 °F
Mostly Cloudy
Detailed Forecast
Overnight
Partly cloudy, with a low around 50. North wind around 5 mph.
Monday
Sunny, with a high near 72. Northeast wind 5 to 10 mph, with gusts as high as 20 mph.
Monday Night
Mostly clear, with a low around 48. North northeast wind around 5 mph.
Tuesday
Partly sunny, with a high near 75. Calm wind becoming east southeast around 5 mph in the morning.
Tuesday Night
Partly cloudy, with a low around 55. East southeast wind around 5 mph becoming calm after midnight.
Wednesday
Partly sunny, with a high near 77. Calm wind becoming southeast around 5 mph in the morning.
Wednesday Night
Mostly cloudy, with a low around 61. South southeast wind around 5 mph.
Thursday
Mostly cloudy, with a high near 81. Calm wind becoming southeast around 5 mph in the morning.
Thursday Night
Mostly cloudy, with a low around 63. Southeast wind around 5 mph.
Friday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 81.
Friday Night
Mostly cloudy, with a low around 66.
Saturday
A 40 percent chance of showers and thunderstorms. Cloudy, with a high near 81.
Saturday Night
A 30 percent chance of showers and thunderstorms. Cloudy, with a low around 68.
Sunday
A 50 percent chance of showers and thunderstorms. Cloudy, with a high near 82.
Additional Forecasts and Information
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ABOUT 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)
2:48 am CDT Apr 6, 2026
3am CDT Apr 6, 2026-6pm CDT Apr 12, 2026


