National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Fair

62°F

17°C

Humidity 73%
Wind Speed N 14 mph
Barometer 30.15 in (1020.6 mb)
Dewpoint 53°F (12°C)
Visibility 10.00 mi
Last update 3 Feb 8:56 pm CST
Extended Forecast for

3 Miles NNW San Marcos Municipal Airport TX

  • Tonight

    Tonight: Mostly clear, with a low around 44. North wind around 10 mph, with gusts as high as 20 mph.

    Low: 44 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 65. North wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 65 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 36. North northwest wind 5 to 10 mph.

    Low: 36 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 67. North northwest wind around 5 mph becoming west southwest in the afternoon.

    High: 67 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 42. Calm wind becoming west around 5 mph in the evening.

    Low: 42 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 77. West wind around 5 mph.

    High: 77 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 44. South wind around 5 mph becoming calm.

    Low: 44 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 78. West wind around 5 mph becoming south in the afternoon.

    High: 78 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 49. South wind around 5 mph.

    Low: 49 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 44. North wind around 10 mph, with gusts as high as 20 mph.
Wednesday
Sunny, with a high near 65. North wind 10 to 15 mph, with gusts as high as 25 mph.
Wednesday Night
Clear, with a low around 36. North northwest wind 5 to 10 mph.
Thursday
Sunny, with a high near 67. North northwest wind around 5 mph becoming west southwest in the afternoon.
Thursday Night
Clear, with a low around 42. Calm wind becoming west around 5 mph in the evening.
Friday
Sunny, with a high near 77. West wind around 5 mph.
Friday Night
Clear, with a low around 44. South wind around 5 mph becoming calm.
Saturday
Sunny, with a high near 78. West wind around 5 mph becoming south in the afternoon.
Saturday Night
Mostly clear, with a low around 49. South wind around 5 mph.
Sunday
Mostly sunny, with a high near 80.
Sunday Night
Mostly cloudy, with a low around 50.
Monday
A 20 percent chance of showers. Partly sunny, with a high near 76.
Monday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 52.
Tuesday
A 20 percent chance of showers. Partly sunny, with a high near 77.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NNW San Marcos Municipal Airport TX
 29.95°N 97.89°W (Elev. 646 ft)
Last Update:
5:46 pm CST Feb 3, 2026
Forecast Valid:
10pm CST Feb 3, 2026-6pm CST Feb 10, 2026
 
Forecast Discussion
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation