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

87°F

31°C

Humidity 63%
Wind Speed S 16 G 22 mph
Barometer 29.90 in (1011.5 mb)
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index94°F (34°C)
Last update 12 Aug 9:56 pm CDT
Extended Forecast for

2 Miles S Lockhart TX

  • Tonight

    Tonight: Mostly clear, with a low around 76. South wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 76 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny and hot, with a high near 101. Heat index values as high as 107. South wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 101 °F

    Hot

  • Thursday Night

    Thursday Night: Increasing clouds, with a low around 76. South southeast wind 15 to 20 mph decreasing to 10 to 15 mph after midnight. Winds could gust as high as 25 mph.

    Low: 76 °F

    Increasing
    Clouds

  • Friday

    Friday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny and hot, with a high near 99. Heat index values as high as 107. South southeast wind 5 to 15 mph, with gusts as high as 20 mph.

    High: 99 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Friday Night

    Friday Night: Partly cloudy, with a low around 77. South wind 5 to 15 mph, with gusts as high as 20 mph.

    Low: 77 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny and hot, with a high near 100. South southeast wind 5 to 10 mph.

    High: 100 °F

    Hot

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 74. South southeast wind 10 to 15 mph decreasing to 5 to 10 mph after midnight. Winds could gust as high as 20 mph.

    Low: 74 °F

    Mostly Clear

  • Sunday

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

    High: 101 °F

    Hot

  • Sunday Night

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

    Low: 74 °F

    Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 76. South wind 10 to 15 mph, with gusts as high as 25 mph.
Thursday
Sunny and hot, with a high near 101. Heat index values as high as 107. South wind 10 to 15 mph, with gusts as high as 25 mph.
Thursday Night
Increasing clouds, with a low around 76. South southeast wind 15 to 20 mph decreasing to 10 to 15 mph after midnight. Winds could gust as high as 25 mph.
Friday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny and hot, with a high near 99. Heat index values as high as 107. South southeast wind 5 to 15 mph, with gusts as high as 20 mph.
Friday Night
Partly cloudy, with a low around 77. South wind 5 to 15 mph, with gusts as high as 20 mph.
Saturday
Sunny and hot, with a high near 100. South southeast wind 5 to 10 mph.
Saturday Night
Mostly clear, with a low around 74. South southeast wind 10 to 15 mph decreasing to 5 to 10 mph after midnight. Winds could gust as high as 20 mph.
Sunday
Mostly sunny and hot, with a high near 101. Calm wind becoming south southeast around 5 mph in the afternoon.
Sunday Night
Clear, with a low around 74. South southwest wind 5 to 10 mph, with gusts as high as 20 mph.
Monday
Sunny and hot, with a high near 100.
Monday Night
Mostly clear, with a low around 76.
Tuesday
Sunny and hot, with a high near 100.
Tuesday Night
Mostly clear, with a low around 76.
Wednesday
Sunny and hot, with a high near 101.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles S Lockhart TX
 29.84°N 97.68°W (Elev. 482 ft)
Last Update:
6:46 pm CDT Aug 12, 2026
Forecast Valid:
10pm CDT Aug 12, 2026-6pm CDT Aug 19, 2026
 
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Additional Resources

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Chance of Precipitation