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

80°F

27°C

Humidity 82%
Wind Speed S 7 mph
Barometer 30.01 in (1015.3 mb)
Dewpoint 74°F (23°C)
Visibility 10.00 mi
Heat Index85°F (29°C)
Last update 5 Jul 12:56 am CDT
Extended Forecast for

Lockhart TX

  • Overnight

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

    Low: 75 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly cloudy, then gradually becoming sunny, with a high near 97. Heat index values as high as 101. South southwest wind around 5 mph.

    High: 97 °F

    Decreasing
    Clouds

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 76. South southeast wind 5 to 10 mph.

    Low: 76 °F

    Partly Cloudy

  • Monday

    Monday: Mostly cloudy, then gradually becoming sunny, with a high near 97. Heat index values as high as 101. South southwest wind around 5 mph.

    High: 97 °F

    Decreasing
    Clouds

  • Monday Night

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

    Low: 76 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 97. South southwest wind around 5 mph.

    High: 97 °F

    Mostly Sunny

  • Tuesday Night

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

    Low: 76 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 98. South southwest wind 5 to 10 mph.

    High: 98 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 76. South wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 76 °F

    Mostly Clear

Detailed Forecast

Overnight
Partly cloudy, with a low around 75. South southwest wind 5 to 10 mph.
Sunday
Mostly cloudy, then gradually becoming sunny, with a high near 97. Heat index values as high as 101. South southwest wind around 5 mph.
Sunday Night
Partly cloudy, with a low around 76. South southeast wind 5 to 10 mph.
Monday
Mostly cloudy, then gradually becoming sunny, with a high near 97. Heat index values as high as 101. South southwest wind around 5 mph.
Monday Night
Mostly clear, with a low around 76. South southeast wind around 5 mph.
Tuesday
Mostly sunny, with a high near 97. South southwest wind around 5 mph.
Tuesday Night
Mostly clear, with a low around 76. South southeast wind 5 to 10 mph.
Wednesday
Sunny, with a high near 98. South southwest wind 5 to 10 mph.
Wednesday Night
Mostly clear, with a low around 76. South wind 10 to 15 mph, with gusts as high as 20 mph.
Thursday
Sunny, with a high near 98.
Thursday Night
Mostly clear, with a low around 76.
Friday
Mostly sunny, with a high near 97.
Friday Night
Mostly clear, with a low around 77.
Saturday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 96.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Lockhart TX
 29.88°N 97.68°W (Elev. 525 ft)
Last Update:
12:42 am CDT Jul 5, 2026
Forecast Valid:
1am CDT Jul 5, 2026-6pm CDT Jul 11, 2026
 
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Additional Resources

Radar & Satellite Image

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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