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

71°F

22°C

Humidity 29%
Wind Speed NE 6 mph
Barometer 30.28 in (1024.9 mb)
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Last update 7 Feb 10:56 am CST
Extended Forecast for

3 Miles NNW San Marcos Municipal Airport TX

  • Today

    Today: Sunny, with a high near 81. East northeast wind around 5 mph becoming south southeast in the afternoon.

    High: 81 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 49. South wind around 5 mph.

    Low: 49 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 77. South southwest wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 77 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 53. South wind around 5 mph.

    Low: 53 °F

    Partly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 79. South southwest wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 79 °F

    Partly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 59. South wind 5 to 10 mph.

    Low: 59 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A 40 percent chance of showers, mainly after noon. Cloudy, with a high near 74. South wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 74 °F

    Chance
    Showers

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers before midnight. Mostly cloudy, with a low around 56. South wind around 5 mph.

    Low: 56 °F

    Chance
    Showers then
    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 83. South southwest wind around 5 mph.

    High: 83 °F

    Mostly Sunny

Detailed Forecast

Today
Sunny, with a high near 81. East northeast wind around 5 mph becoming south southeast in the afternoon.
Tonight
Partly cloudy, with a low around 49. South wind around 5 mph.
Sunday
Partly sunny, with a high near 77. South southwest wind 5 to 10 mph, with gusts as high as 20 mph.
Sunday Night
Partly cloudy, with a low around 53. South wind around 5 mph.
Monday
Partly sunny, with a high near 79. South southwest wind 5 to 10 mph, with gusts as high as 20 mph.
Monday Night
Mostly cloudy, with a low around 59. South wind 5 to 10 mph.
Tuesday
A 40 percent chance of showers, mainly after noon. Cloudy, with a high near 74. South wind 5 to 10 mph, with gusts as high as 20 mph.
Tuesday Night
A 30 percent chance of showers before midnight. Mostly cloudy, with a low around 56. South wind around 5 mph.
Wednesday
Mostly sunny, with a high near 83. South southwest wind around 5 mph.
Wednesday Night
Mostly clear, with a low around 56.
Thursday
Mostly sunny, with a high near 85.
Thursday Night
Partly cloudy, with a low around 57.
Friday
A 20 percent chance of showers. Partly sunny, with a high near 79.
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:
11:30 am CST Feb 7, 2026
Forecast Valid:
11am CST Feb 7, 2026-6pm CST Feb 13, 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