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

86°F

30°C

Humidity 63%
Wind Speed S 16 mph
Barometer 29.96 in (1013.6 mb)
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index92°F (33°C)
Last update 4 Aug 9:56 pm CDT
Extended Forecast for

5 Miles SE Lockhart TX

  • Tonight

    Tonight: Mostly clear, with a low around 76. South wind 5 to 10 mph.

    Low: 76 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 99. Heat index values as high as 107. South wind 5 to 10 mph.

    High: 99 °F

    Hot

  • Wednesday Night

    Wednesday Night: Increasing clouds, with a low around 76. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 76 °F

    Increasing
    Clouds

  • Thursday

    Thursday: Sunny and hot, with a high near 99. Heat index values as high as 107. South wind around 5 mph.

    High: 99 °F

    Hot

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 76. South wind 5 to 10 mph.

    Low: 76 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 97. Calm wind becoming southeast around 5 mph in the morning.

    High: 97 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 75. Southeast wind 5 to 10 mph.

    Low: 75 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 97. Calm wind becoming southeast around 5 mph in the afternoon.

    High: 97 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 75. Southeast wind 5 to 10 mph.

    Low: 75 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 76. South wind 5 to 10 mph.
Wednesday
Sunny and hot, with a high near 99. Heat index values as high as 107. South wind 5 to 10 mph.
Wednesday Night
Increasing clouds, with a low around 76. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Thursday
Sunny and hot, with a high near 99. Heat index values as high as 107. South wind around 5 mph.
Thursday Night
Mostly clear, with a low around 76. South wind 5 to 10 mph.
Friday
Mostly sunny, with a high near 97. Calm wind becoming southeast around 5 mph in the morning.
Friday Night
Mostly clear, with a low around 75. Southeast wind 5 to 10 mph.
Saturday
Mostly sunny, with a high near 97. Calm wind becoming southeast around 5 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 75. Southeast wind 5 to 10 mph.
Sunday
Mostly sunny, with a high near 96.
Sunday Night
Mostly clear, with a low around 76.
Monday
Mostly sunny, with a high near 97.
Monday Night
Mostly clear, with a low around 76.
Tuesday
Mostly sunny, with a high near 98.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles SE Lockhart TX
 29.82°N 97.62°W (Elev. 479 ft)
Last Update:
6:42 pm CDT Aug 4, 2026
Forecast Valid:
10pm CDT Aug 4, 2026-6pm CDT Aug 11, 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