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

55°F

13°C

Humidity 90%
Wind Speed NW 5 mph
Barometer 30.19 in (1022.0 mb)
Dewpoint 52°F (11°C)
Visibility 10.00 mi
Wind Chill54°F (12°C)
Last update 3 May 12:56 am CDT
Extended Forecast for

Lockhart TX

  • Overnight

    Overnight: Mostly clear, with a low around 51. Calm wind.

    Low: 51 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 79. Calm wind becoming south around 5 mph in the afternoon.

    High: 79 °F

    Sunny

  • Sunday Night

    Sunday Night: Increasing clouds, with a low around 56. South southeast wind around 5 mph.

    Low: 56 °F

    Increasing
    Clouds

  • Monday

    Monday: Mostly sunny, with a high near 85. South wind 5 to 15 mph, with gusts as high as 25 mph.

    High: 85 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 69. South wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 69 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 89. South wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 89 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 73. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 73 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 87. South wind 5 to 10 mph becoming west northwest in the afternoon.

    High: 87 °F

    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A 20 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 63. North northeast wind 5 to 15 mph.

    Low: 63 °F

    Mostly Cloudy
    then Slight
    Chance
    T-storms

Detailed Forecast

Overnight
Mostly clear, with a low around 51. Calm wind.
Sunday
Sunny, with a high near 79. Calm wind becoming south around 5 mph in the afternoon.
Sunday Night
Increasing clouds, with a low around 56. South southeast wind around 5 mph.
Monday
Mostly sunny, with a high near 85. South wind 5 to 15 mph, with gusts as high as 25 mph.
Monday Night
Mostly cloudy, with a low around 69. South wind 10 to 15 mph, with gusts as high as 20 mph.
Tuesday
Mostly cloudy, with a high near 89. South wind 10 to 15 mph, with gusts as high as 20 mph.
Tuesday Night
Mostly cloudy, with a low around 73. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Wednesday
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 87. South wind 5 to 10 mph becoming west northwest in the afternoon.
Wednesday Night
A 20 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 63. North northeast wind 5 to 15 mph.
Thursday
A 30 percent chance of showers. Mostly cloudy, with a high near 77.
Thursday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 61.
Friday
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 83.
Friday Night
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 66.
Saturday
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 85.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Lockhart TX
 29.88°N 97.68°W (Elev. 525 ft)
Last Update:
1:44 am CDT May 3, 2026
Forecast Valid:
1am CDT May 3, 2026-6pm CDT May 9, 2026
 
Forecast Discussion
 
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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