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.

Overcast

78°F

26°C

Humidity 93%
Wind Speed SE 3 mph
Barometer 29.95 in (1013.2 mb)
Dewpoint 76°F (24°C)
Visibility 8.00 mi
Heat Index81°F (27°C)
Last update 4 Aug 6:56 am CDT
Extended Forecast for

6 Miles S Lockhart TX

  • Today

    Today: Sunny and hot, with a high near 100. Heat index values as high as 104. South wind 5 to 10 mph.

    High: 100 °F

    Hot

  • Tonight

    Tonight: 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

  • Wednesday

    Wednesday: Mostly sunny and hot, with a high near 100. Heat index values as high as 105. South wind 5 to 10 mph.

    High: 100 °F

    Hot

  • Wednesday Night

    Wednesday Night: Increasing clouds, with a low around 76. South southeast wind 5 to 15 mph, with gusts as high as 20 mph.

    Low: 76 °F

    Increasing
    Clouds

  • Thursday

    Thursday: Mostly sunny and hot, with a high near 99. South wind around 5 mph.

    High: 99 °F

    Hot

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 76. Southeast wind 5 to 10 mph, with gusts as high as 20 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: A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 76. Southeast wind 5 to 10 mph becoming light south after midnight.

    Low: 76 °F

    Slight Chance
    T-storms

  • Saturday

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

    High: 97 °F

    Mostly Sunny

Detailed Forecast

Today
Sunny and hot, with a high near 100. Heat index values as high as 104. South wind 5 to 10 mph.
Tonight
Mostly clear, with a low around 76. South wind 5 to 10 mph, with gusts as high as 20 mph.
Wednesday
Mostly sunny and hot, with a high near 100. Heat index values as high as 105. South wind 5 to 10 mph.
Wednesday Night
Increasing clouds, with a low around 76. South southeast wind 5 to 15 mph, with gusts as high as 20 mph.
Thursday
Mostly sunny and hot, with a high near 99. South wind around 5 mph.
Thursday Night
Mostly clear, with a low around 76. Southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Friday
Mostly sunny, with a high near 97. Calm wind becoming southeast around 5 mph in the morning.
Friday Night
A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 76. Southeast wind 5 to 10 mph becoming light south after midnight.
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 76.
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.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
6 Miles S Lockhart TX
 29.79°N 97.68°W (Elev. 466 ft)
Last Update:
6:42 am CDT Aug 4, 2026
Forecast Valid:
7am CDT Aug 4, 2026-6pm CDT Aug 10, 2026
 
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Additional Resources

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Chance of Precipitation