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

88°F

31°C

Humidity 61%
Wind Speed SE 16 G 24 mph
Barometer 29.78 in (1007.7 mb)
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index96°F (36°C)
Last update 17 May 7:56 pm CDT
Extended Forecast for

Lockhart TX

  • Tonight

    Tonight: Mostly cloudy, with a low around 77. South southeast wind around 10 mph, with gusts as high as 20 mph.

    Low: 77 °F

    Mostly Cloudy

  • Sunday

    Sunday: Widespread haze before 11am. Partly sunny, with a high near 96. Heat index values as high as 103. South wind 10 to 20 mph, with gusts as high as 30 mph.

    High: 96 °F

    Haze then
    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 77. South southeast wind around 15 mph, with gusts as high as 25 mph.

    Low: 77 °F

    Mostly Cloudy

  • Monday

    Monday: A 20 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 97. Heat index values as high as 104. South wind 10 to 20 mph, with gusts as high as 30 mph.

    High: 97 °F

    Mostly Cloudy
    then Slight
    Chance
    T-storms

  • Monday Night

    Monday Night: Partly cloudy, with a low around 73. South southeast wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 73 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny and hot, with a high near 99. South wind 5 to 10 mph becoming north in the afternoon.

    High: 99 °F

    Hot

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 66. Northeast wind 5 to 10 mph.

    Low: 66 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 94. East northeast wind 5 to 10 mph.

    High: 94 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 64. East wind 5 to 10 mph.

    Low: 64 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 77. South southeast wind around 10 mph, with gusts as high as 20 mph.
Sunday
Widespread haze before 11am. Partly sunny, with a high near 96. Heat index values as high as 103. South wind 10 to 20 mph, with gusts as high as 30 mph.
Sunday Night
Mostly cloudy, with a low around 77. South southeast wind around 15 mph, with gusts as high as 25 mph.
Monday
A 20 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 97. Heat index values as high as 104. South wind 10 to 20 mph, with gusts as high as 30 mph.
Monday Night
Partly cloudy, with a low around 73. South southeast wind 10 to 15 mph, with gusts as high as 25 mph.
Tuesday
Mostly sunny and hot, with a high near 99. South wind 5 to 10 mph becoming north in the afternoon.
Tuesday Night
Partly cloudy, with a low around 66. Northeast wind 5 to 10 mph.
Wednesday
Mostly sunny, with a high near 94. East northeast wind 5 to 10 mph.
Wednesday Night
Mostly cloudy, with a low around 64. East wind 5 to 10 mph.
Thursday
Mostly sunny, with a high near 94.
Thursday Night
Partly cloudy, with a low around 63.
Friday
Sunny, with a high near 97.
Friday Night
Partly cloudy, with a low around 67.
Saturday
Mostly sunny, with a high near 97.
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:
8:18 pm CDT May 17, 2025
Forecast Valid:
8pm CDT May 17, 2025-6pm CDT May 24, 2025
 
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