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.

A Few Clouds

87°F

31°C

Humidity 39%
Wind Speed SE 13 mph
Barometer 29.99 in (1014.7 mb)
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Heat Index86°F (30°C)
Last update 25 Mar 4:56 pm CDT
Extended Forecast for

Lockhart TX

  • Tonight

    Tonight: Increasing clouds, with a low around 64. South southeast wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 64 °F

    Increasing
    Clouds

  • Thursday

    Thursday: Cloudy through mid morning, then gradual clearing, with a high near 89. South wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 89 °F

    Becoming
    Sunny

  • Thursday Night

    Thursday Night: Increasing clouds, with a low around 62. South wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 62 °F

    Increasing
    Clouds

  • Friday

    Friday: Mostly cloudy, then gradually becoming sunny, with a high near 90. South wind 5 to 10 mph becoming east southeast in the afternoon.

    High: 90 °F

    Decreasing
    Clouds

  • Friday Night

    Friday Night: Partly cloudy, with a low around 60. North northeast wind around 10 mph, with gusts as high as 20 mph.

    Low: 60 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 81. North northeast wind around 10 mph, with gusts as high as 20 mph.

    High: 81 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 55. East northeast wind 5 to 10 mph becoming light and variable after midnight.

    Low: 55 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 86. Light south southeast wind becoming south 5 to 10 mph in the morning.

    High: 86 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 58. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 58 °F

    Mostly Clear

Detailed Forecast

Tonight
Increasing clouds, with a low around 64. South southeast wind 10 to 15 mph, with gusts as high as 20 mph.
Thursday
Cloudy through mid morning, then gradual clearing, with a high near 89. South wind 10 to 15 mph, with gusts as high as 25 mph.
Thursday Night
Increasing clouds, with a low around 62. South wind 10 to 15 mph, with gusts as high as 25 mph.
Friday
Mostly cloudy, then gradually becoming sunny, with a high near 90. South wind 5 to 10 mph becoming east southeast in the afternoon.
Friday Night
Partly cloudy, with a low around 60. North northeast wind around 10 mph, with gusts as high as 20 mph.
Saturday
Partly sunny, with a high near 81. North northeast wind around 10 mph, with gusts as high as 20 mph.
Saturday Night
Mostly clear, with a low around 55. East northeast wind 5 to 10 mph becoming light and variable after midnight.
Sunday
Mostly sunny, with a high near 86. Light south southeast wind becoming south 5 to 10 mph in the morning.
Sunday Night
Mostly clear, with a low around 58. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Monday
Partly sunny, with a high near 89.
Monday Night
Partly cloudy, with a low around 63.
Tuesday
Partly sunny, with a high near 91.
Tuesday Night
Partly cloudy, with a low around 65.
Wednesday
Partly sunny, with a high near 91.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Lockhart TX
 29.88°N 97.68°W (Elev. 525 ft)
Last Update:
5:32 pm CDT Mar 25, 2026
Forecast Valid:
5pm CDT Mar 25, 2026-6pm CDT Apr 1, 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