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

78°F

26°C

Humidity 79%
Wind Speed S 5 mph
Barometer 30.16 in (1020.2 mb)
Dewpoint 71°F (22°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 16 Aug 12:56 am CDT
Extended Forecast for

Lockhart TX

  • Overnight

    Overnight: Partly cloudy, with a low around 75. South wind 5 to 10 mph.

    Low: 75 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny and hot, with a high near 102. Calm wind becoming south around 5 mph in the morning.

    High: 102 °F

    Hot

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 74. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 74 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny and hot, with a high near 101. Calm wind becoming south southeast around 5 mph in the afternoon.

    High: 101 °F

    Hot

  • Monday Night

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

    Low: 76 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny and hot, with a high near 100. South southwest wind around 5 mph.

    High: 100 °F

    Hot

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 77. South wind 5 to 10 mph.

    Low: 77 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny and hot, with a high near 101. South southwest wind 5 to 10 mph.

    High: 101 °F

    Hot

  • Wednesday Night

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

    Low: 76 °F

    Mostly Clear

Detailed Forecast

Overnight
Partly cloudy, with a low around 75. South wind 5 to 10 mph.
Sunday
Sunny and hot, with a high near 102. Calm wind becoming south around 5 mph in the morning.
Sunday Night
Mostly clear, with a low around 74. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Monday
Mostly sunny and hot, with a high near 101. Calm wind becoming south southeast around 5 mph in the afternoon.
Monday Night
Mostly clear, with a low around 76. South southeast wind 5 to 10 mph.
Tuesday
Sunny and hot, with a high near 100. South southwest wind around 5 mph.
Tuesday Night
Partly cloudy, with a low around 77. South wind 5 to 10 mph.
Wednesday
Mostly sunny and hot, with a high near 101. South southwest wind 5 to 10 mph.
Wednesday Night
Mostly clear, with a low around 76. South wind 5 to 10 mph, with gusts as high as 20 mph.
Thursday
Mostly sunny and hot, with a high near 102.
Thursday Night
Mostly clear, with a low around 77.
Friday
Sunny and hot, with a high near 102.
Friday Night
Mostly clear, with a low around 77.
Saturday
Mostly sunny and hot, with a high near 102.
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:
12:42 am CDT Aug 16, 2026
Forecast Valid:
1am CDT Aug 16, 2026-6pm CDT Aug 22, 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