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

79°F

26°C

Humidity 94%
Wind Speed S 8 mph
Barometer 29.94 in (1012.7 mb)
Dewpoint 77°F (25°C)
Visibility 10.00 mi
Heat Index83°F (28°C)
Last update 7 Jun 4:56 am CDT
Extended Forecast for

Lockhart TX

  • Today

    Today: Mostly cloudy, then gradually becoming sunny, with a high near 97. Heat index values as high as 106. South wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 97 °F

    Decreasing
    Clouds

  • Tonight

    Tonight: Increasing clouds, with a low around 75. South southeast wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 75 °F

    Increasing
    Clouds

  • Sunday

    Sunday: Mostly cloudy, then gradually becoming sunny, with a high near 98. Heat index values as high as 106. South wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 98 °F

    Decreasing
    Clouds

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 75. South southeast wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 75 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 97. South southeast wind around 10 mph.

    High: 97 °F

    Mostly Sunny

  • Monday Night

    Monday Night: A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am, then a slight chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 74. South southeast wind 5 to 15 mph. Chance of precipitation is 20%.

    Low: 74 °F

    Slight Chance
    T-storms

  • Tuesday

    Tuesday: A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 94. South wind 5 to 10 mph. Chance of precipitation is 50%.

    High: 94 °F

    Chance
    Showers then
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 73. East southeast wind 5 to 10 mph.

    Low: 73 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 90. South southeast wind 5 to 10 mph. Chance of precipitation is 60%.

    High: 90 °F

    Showers
    Likely

Detailed Forecast

Today
Mostly cloudy, then gradually becoming sunny, with a high near 97. Heat index values as high as 106. South wind 5 to 10 mph, with gusts as high as 20 mph.
Tonight
Increasing clouds, with a low around 75. South southeast wind 10 to 15 mph, with gusts as high as 20 mph.
Sunday
Mostly cloudy, then gradually becoming sunny, with a high near 98. Heat index values as high as 106. South wind 5 to 10 mph, with gusts as high as 20 mph.
Sunday Night
Partly cloudy, with a low around 75. South southeast wind 10 to 15 mph, with gusts as high as 20 mph.
Monday
Mostly sunny, with a high near 97. South southeast wind around 10 mph.
Monday Night
A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am, then a slight chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 74. South southeast wind 5 to 15 mph. Chance of precipitation is 20%.
Tuesday
A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 94. South wind 5 to 10 mph. Chance of precipitation is 50%.
Tuesday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 73. East southeast wind 5 to 10 mph.
Wednesday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 90. South southeast wind 5 to 10 mph. Chance of precipitation is 60%.
Wednesday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 71.
Thursday
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 89.
Thursday Night
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 75.
Friday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 93.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Lockhart TX
 29.88°N 97.7°W (Elev. 564 ft)
Last Update:
2:43 am CDT Jun 7, 2025
Forecast Valid:
5am CDT Jun 7, 2025-6pm CDT Jun 13, 2025
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation