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.

Mostly Cloudy

79°F

26°C

Humidity 94%
Wind Speed SE 7 mph
Barometer 29.82 in (1008.8 mb)
Dewpoint 77°F (25°C)
Visibility 10.00 mi
Heat Index83°F (28°C)
Last update 18 May 1:56 am CDT
Extended Forecast for

Lockhart TX

  • Overnight

    Overnight: Cloudy, with a low around 76. South southeast wind around 10 mph.

    Low: 76 °F

    Cloudy

  • Sunday

    Sunday: Widespread haze before 11am. Mostly cloudy, with a high near 96. Heat index values as high as 102. South wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 96 °F

    Haze then
    Mostly Cloudy

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 75. South southeast wind around 15 mph, with gusts as high as 25 mph.

    Low: 75 °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: Isolated showers and thunderstorms after 1pm. Mostly sunny, with a high near 96. South wind around 5 mph becoming north in the afternoon. Chance of precipitation is 20%.

    High: 96 °F

    Mostly Sunny
    then Isolated
    T-storms

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 68. Northeast wind around 5 mph.

    Low: 68 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 95. East wind 5 to 10 mph.

    High: 95 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 68. East wind 5 to 10 mph becoming south southeast after midnight.

    Low: 68 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Cloudy, with a low around 76. South southeast wind around 10 mph.
Sunday
Widespread haze before 11am. Mostly cloudy, with a high near 96. Heat index values as high as 102. South wind 10 to 15 mph, with gusts as high as 25 mph.
Sunday Night
Mostly cloudy, with a low around 75. 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
Isolated showers and thunderstorms after 1pm. Mostly sunny, with a high near 96. South wind around 5 mph becoming north in the afternoon. Chance of precipitation is 20%.
Tuesday Night
Partly cloudy, with a low around 68. Northeast wind around 5 mph.
Wednesday
Partly sunny, with a high near 95. East wind 5 to 10 mph.
Wednesday Night
Mostly cloudy, with a low around 68. East wind 5 to 10 mph becoming south southeast after midnight.
Thursday
Mostly sunny, with a high near 94.
Thursday Night
Partly cloudy, with a low around 66.
Friday
Mostly sunny, with a high near 95.
Friday Night
Partly cloudy, with a low around 69.
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:
2:02 am CDT May 18, 2025
Forecast Valid:
2am CDT May 18, 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