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

68°F

20°C

Humidity 40%
Wind Speed S 17 G 23 mph
Barometer 30.09 in (1018.6 mb)
Dewpoint 43°F (6°C)
Visibility 10.00 mi
Last update 13 Mar 11:56 am CDT
Extended Forecast for

2 Miles WSW San Marcos TX

  • This Afternoon

    This Afternoon: Sunny, with a high near 80. South wind around 10 mph, with gusts as high as 20 mph.

    High: 80 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 51. South wind around 5 mph.

    Low: 51 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 85. South wind 5 to 15 mph, with gusts as high as 20 mph.

    High: 85 °F

    Sunny

  • Saturday Night

    Saturday Night: Increasing clouds, with a low around 62. South southeast wind around 10 mph, with gusts as high as 20 mph.

    Low: 62 °F

    Increasing
    Clouds

  • Sunday

    Sunday: Partly sunny, with a high near 91. South southwest wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 91 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 40. North wind 15 to 20 mph, with gusts as high as 35 mph.

    Low: 40 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 58. North wind 15 to 20 mph, with gusts as high as 30 mph.

    High: 58 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 35. North northeast wind 5 to 10 mph becoming southeast after midnight.

    Low: 35 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 68. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 68 °F

    Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 80. South wind around 10 mph, with gusts as high as 20 mph.
Tonight
Clear, with a low around 51. 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
Increasing clouds, with a low around 62. South southeast wind around 10 mph, with gusts as high as 20 mph.
Sunday
Partly sunny, with a high near 91. South southwest wind 10 to 15 mph, with gusts as high as 25 mph.
Sunday Night
Mostly clear, with a low around 40. North wind 15 to 20 mph, with gusts as high as 35 mph.
Monday
Mostly sunny, with a high near 58. North wind 15 to 20 mph, with gusts as high as 30 mph.
Monday Night
Mostly cloudy, with a low around 35. North northeast wind 5 to 10 mph becoming southeast after midnight.
Tuesday
Sunny, with a high near 68. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Tuesday Night
Partly cloudy, with a low around 44.
Wednesday
Mostly sunny, with a high near 78.
Wednesday Night
Mostly clear, with a low around 52.
Thursday
Mostly sunny, with a high near 83.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles WSW San Marcos TX
 29.86°N 97.97°W (Elev. 646 ft)
Last Update:
11:32 am CDT Mar 13, 2026
Forecast Valid:
12pm CDT Mar 13, 2026-6pm CDT Mar 19, 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