Current conditions at
San Marcos, San Marcos Municipal Airport (KHYI)
Lat: 29.89°NLon: 97.86°WElev: 597ft.
Overcast
71°F
22°C
| Humidity | 90% |
| Wind Speed | S 12 mph |
| Barometer | 29.94 in (1013.1 mb) |
| Dewpoint | 68°F (20°C) |
| Visibility | 10.00 mi |
| Last update | 10 Mar 5:56 am CDT |
Extended Forecast for
3 Miles NNW San Marcos Municipal Airport TX
Today
High: 83 °F
Chance
ShowersTonight
Low: 61 °F
Slight Chance
T-storms then
ShowersWednesday
High: 81 °F
Showers
Wednesday Night
Low: 48 °F
Chance
T-storms then
Slight Chance
ShowersThursday
High: 69 °F
Sunny
Thursday Night
Low: 44 °F
Clear
Friday
High: 78 °F
Sunny
Friday Night
Low: 52 °F
Clear
Saturday
High: 85 °F
Sunny
Detailed Forecast
Today
A chance of showers before 1pm, then a slight chance of showers and thunderstorms between 1pm and 4pm. Cloudy, with a high near 83. South wind 10 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 30%.
Tonight
A slight chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1am. Low around 61. South southeast wind 5 to 15 mph becoming northwest after midnight. Winds could gust as high as 30 mph. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday
Showers and possibly a thunderstorm, mainly before 1pm, then a chance of showers and thunderstorms after 1pm. High near 81. Northeast wind 5 to 10 mph becoming west southwest in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
A chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am. Mostly clear, with a low around 48. North wind 10 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 30%.
Thursday
Sunny, with a high near 69. North wind 10 to 15 mph, with gusts as high as 25 mph.
Thursday Night
Clear, with a low around 44. Northeast wind around 5 mph becoming calm in the evening.
Friday
Sunny, with a high near 78. South southwest wind 5 to 10 mph, with gusts as high as 20 mph.
Friday Night
Clear, with a low around 52. South wind around 5 mph.
Saturday
Sunny, with a high near 85. South wind 5 to 15 mph, with gusts as high as 20 mph.
Saturday Night
Mostly clear, with a low around 59.
Sunday
Partly sunny, with a high near 89.
Sunday Night
Mostly clear, with a low around 48.
Monday
Mostly sunny, with a high near 67.
Additional Forecasts and Information
Basemap Options
Click map to change the forecast location
Loading map...
Forecast AreaABOUT 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)
5:32 am CDT Mar 10, 2026
6am CDT Mar 10, 2026-6pm CDT Mar 16, 2026
Additional Resources
Radar & Satellite Image
Hourly Weather Forecast
