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

72°F

22°C

Humidity 91%
Wind Speed SE 5 mph
Barometer 30.00 in (1015.1 mb)
Dewpoint 69°F (21°C)
Visibility 10.00 mi
Last update 10 Jul 4:56 am CDT
Extended Forecast for

2 Miles SSW Lockhart TX

  • Today

    Today: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 94. Heat index values as high as 100. South wind 5 to 15 mph, with gusts as high as 20 mph.

    High: 94 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Tonight

    Tonight: A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers and thunderstorms after 1am. Mostly clear, with a low around 76. South southeast wind 5 to 10 mph. Chance of precipitation is 20%.

    Low: 76 °F

    Slight Chance
    T-storms

  • Saturday

    Saturday: A 30 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 94. Heat index values as high as 101. Light southeast wind becoming south southeast 5 to 10 mph in the morning.

    High: 94 °F

    Chance
    T-storms

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 76. South southeast wind 5 to 10 mph.

    Low: 76 °F

    Partly Cloudy

  • Sunday

    Sunday: A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 94. Calm wind becoming south southeast around 5 mph in the afternoon.

    High: 94 °F

    Mostly Sunny
    then Chance
    T-storms

  • Sunday Night

    Sunday 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. Partly cloudy, with a low around 76. South wind 5 to 10 mph. Chance of precipitation is 20%.

    Low: 76 °F

    Slight Chance
    T-storms

  • Monday

    Monday: A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 93. Calm wind becoming south southeast around 5 mph in the afternoon.

    High: 93 °F

    Chance
    Showers then
    Chance
    T-storms

  • Monday Night

    Monday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 74. South southeast wind around 5 mph. Chance of precipitation is 60%.

    Low: 74 °F

    Chance
    T-storms then
    Showers
    Likely

  • Tuesday

    Tuesday: Showers likely, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 90. East southeast wind around 5 mph. Chance of precipitation is 60%.

    High: 90 °F

    Showers
    Likely

Detailed Forecast

Today
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 94. Heat index values as high as 100. South wind 5 to 15 mph, with gusts as high as 20 mph.
Tonight
A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers and thunderstorms after 1am. Mostly clear, with a low around 76. South southeast wind 5 to 10 mph. Chance of precipitation is 20%.
Saturday
A 30 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 94. Heat index values as high as 101. Light southeast wind becoming south southeast 5 to 10 mph in the morning.
Saturday Night
Partly cloudy, with a low around 76. South southeast wind 5 to 10 mph.
Sunday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 94. Calm wind becoming south southeast around 5 mph in the afternoon.
Sunday 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. Partly cloudy, with a low around 76. South wind 5 to 10 mph. Chance of precipitation is 20%.
Monday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 93. Calm wind becoming south southeast around 5 mph in the afternoon.
Monday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 74. South southeast wind around 5 mph. Chance of precipitation is 60%.
Tuesday
Showers likely, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 90. East southeast wind around 5 mph. Chance of precipitation is 60%.
Tuesday Night
A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 74. Chance of precipitation is 20%.
Wednesday
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 91.
Wednesday Night
A 20 percent chance of showers. Partly cloudy, with a low around 74.
Thursday
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 94.
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SSW Lockhart TX
 29.86°N 97.7°W (Elev. 545 ft)
Last Update:
5:32 am CDT Jul 10, 2026
Forecast Valid:
5am CDT Jul 10, 2026-6pm CDT Jul 16, 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