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

65°F

18°C

Humidity 90%
Wind Speed N 13 mph
Barometer 29.93 in (1012.8 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Last update 30 Apr 9:56 am CDT
Extended Forecast for

Lockhart TX

  • Today

    Today: A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 79. Northeast wind around 10 mph.

    High: 79 °F

    Chance
    T-storms

  • Tonight

    Tonight: Showers and thunderstorms likely, then showers and possibly a thunderstorm after 4am. Low around 62. Northeast wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New rainfall amounts between three quarters and one inch possible.

    Low: 62 °F

    Showers
    Likely then
    Showers

  • Friday

    Friday: Showers and possibly a thunderstorm. High near 65. Northeast wind 10 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.

    High: 65 °F

    Showers

  • Friday Night

    Friday Night: A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 1am. Mostly cloudy, with a low around 52. North wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 30%.

    Low: 52 °F

    Chance
    Showers

  • Saturday

    Saturday: Sunny, with a high near 71. North wind around 15 mph, with gusts as high as 25 mph.

    High: 71 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 48. North northeast wind 5 to 10 mph becoming light in the evening.

    Low: 48 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 76. Calm wind becoming southeast around 5 mph in the afternoon.

    High: 76 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 55. Southeast wind around 5 mph.

    Low: 55 °F

    Mostly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 82. Light south wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 20 mph.

    High: 82 °F

    Partly Sunny

Detailed Forecast

Today
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 79. Northeast wind around 10 mph.
Tonight
Showers and thunderstorms likely, then showers and possibly a thunderstorm after 4am. Low around 62. Northeast wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New rainfall amounts between three quarters and one inch possible.
Friday
Showers and possibly a thunderstorm. High near 65. Northeast wind 10 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.
Friday Night
A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 1am. Mostly cloudy, with a low around 52. North wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 30%.
Saturday
Sunny, with a high near 71. North wind around 15 mph, with gusts as high as 25 mph.
Saturday Night
Mostly clear, with a low around 48. North northeast wind 5 to 10 mph becoming light in the evening.
Sunday
Mostly sunny, with a high near 76. Calm wind becoming southeast around 5 mph in the afternoon.
Sunday Night
Mostly cloudy, with a low around 55. Southeast wind around 5 mph.
Monday
Partly sunny, with a high near 82. Light south wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 20 mph.
Monday Night
Mostly cloudy, with a low around 65.
Tuesday
Mostly cloudy, with a high near 89.
Tuesday Night
Mostly cloudy, with a low around 71.
Wednesday
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 89.
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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:
6:44 am CDT Apr 30, 2026
Forecast Valid:
10am CDT Apr 30, 2026-6pm CDT May 6, 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