Hazardous Weather Conditions
Current conditions at
San Marcos, San Marcos Municipal Airport (KHYI)
Lat: 29.89°NLon: 97.86°WElev: 597ft.
Fair
49°F
9°C
| Humidity | 25% |
| Wind Speed | N 17 G 26 mph |
| Barometer | 30.38 in (1028.6 mb) |
| Dewpoint | 14°F (-10°C) |
| Visibility | 10.00 mi |
| Wind Chill | 43°F (6°C) |
| Last update | 16 Mar 10:56 am CDT |
Extended Forecast for
4 Miles NNW San Marcos Municipal Airport TX
Red Flag Warning March 16, 11:27am until March 16, 08:00pm
NOW until 8:00pm Mon

Red Flag Warning
Today

High: 56 °F
Partly Sunny
and BreezyTonight

Low: 32 °F
Gradual
ClearingTuesday

High: 66 °F
Sunny
Tuesday Night

Low: 42 °F
Partly Cloudy
Wednesday

High: 78 °F
Sunny
Wednesday Night

Low: 50 °F
Mostly Clear
Thursday

High: 85 °F
Sunny
Thursday Night

Low: 55 °F
Clear
Detailed Forecast
Today
Partly sunny, with a high near 56. Breezy, with a north wind 15 to 25 mph, with gusts as high as 35 mph.
Tonight
Cloudy during the early evening, then gradual clearing, with a low around 32. North northeast wind 5 to 10 mph becoming light and variable after midnight.
Tuesday
Sunny, with a high near 66. Light south wind increasing to 10 to 15 mph in the morning. Winds could gust as high as 20 mph.
Tuesday Night
Partly cloudy, with a low around 42. South wind 5 to 10 mph, with gusts as high as 20 mph.
Wednesday
Sunny, with a high near 78. South wind 5 to 10 mph, with gusts as high as 20 mph.
Wednesday Night
Mostly clear, with a low around 50. South wind around 5 mph.
Thursday
Sunny, with a high near 85. Southwest wind 5 to 10 mph.
Thursday Night
Clear, with a low around 55. South wind around 5 mph.
Friday
Sunny, with a high near 90. Southwest wind 5 to 10 mph.
Friday Night
Clear, with a low around 58.
Saturday
Sunny, with a high near 93.
Saturday Night
Clear, with a low around 60.
Sunday
Sunny, with a high near 91.
Additional Forecasts and Information
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ABOUT THIS FORECAST
Point Forecast:
4 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)
8:44 am CDT Mar 16, 2026
11am CDT Mar 16, 2026-6pm CDT Mar 22, 2026



