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

72°F

22°C

Humidity 87%
Wind Speed S 9 mph
Barometer 29.96 in (1013.6 mb)
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Last update 4 Apr 4:56 am CDT
Extended Forecast for

Lockhart TX

  • Overnight

    Overnight: A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 69. South wind around 10 mph.

    Low: 69 °F

    Chance
    Showers

  • Saturday

    Saturday: Showers and thunderstorms likely before 1pm, then showers and possibly a thunderstorm between 1pm and 4pm, then a chance of showers and thunderstorms after 4pm. High near 77. South wind 5 to 15 mph becoming north in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 77 °F

    Showers

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms before 1am, then a slight chance of showers after 4am. Cloudy, then gradually becoming partly cloudy, with a low around 53. North northeast wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 30%.

    Low: 53 °F

    Chance
    Showers

  • Sunday

    Sunday: A 20 percent chance of showers before 1pm. Mostly cloudy, with a high near 66. North northeast wind 15 to 20 mph, with gusts as high as 30 mph.

    High: 66 °F

    Slight Chance
    Showers

  • Sunday Night

    Sunday Night: Cloudy, with a low around 52. North northeast wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 52 °F

    Cloudy

  • Monday

    Monday: Partly sunny, with a high near 71. North northeast wind 5 to 10 mph.

    High: 71 °F

    Partly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 49. Northeast wind around 5 mph becoming calm in the evening.

    Low: 49 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 70. East northeast wind around 5 mph.

    High: 70 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 50. East wind around 5 mph becoming calm in the evening.

    Low: 50 °F

    Mostly Cloudy

Detailed Forecast

Overnight
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 69. South wind around 10 mph.
Saturday
Showers and thunderstorms likely before 1pm, then showers and possibly a thunderstorm between 1pm and 4pm, then a chance of showers and thunderstorms after 4pm. High near 77. South wind 5 to 15 mph becoming north in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
Saturday Night
A chance of showers and thunderstorms before 1am, then a slight chance of showers after 4am. Cloudy, then gradually becoming partly cloudy, with a low around 53. North northeast wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 30%.
Sunday
A 20 percent chance of showers before 1pm. Mostly cloudy, with a high near 66. North northeast wind 15 to 20 mph, with gusts as high as 30 mph.
Sunday Night
Cloudy, with a low around 52. North northeast wind 5 to 10 mph, with gusts as high as 20 mph.
Monday
Partly sunny, with a high near 71. North northeast wind 5 to 10 mph.
Monday Night
Mostly cloudy, with a low around 49. Northeast wind around 5 mph becoming calm in the evening.
Tuesday
Mostly cloudy, with a high near 70. East northeast wind around 5 mph.
Tuesday Night
Mostly cloudy, with a low around 50. East wind around 5 mph becoming calm in the evening.
Wednesday
Partly sunny, with a high near 79.
Wednesday Night
Mostly cloudy, with a low around 57.
Thursday
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 83.
Thursday Night
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 64.
Friday
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 83.
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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:
2:46 am CDT Apr 4, 2026
Forecast Valid:
5am CDT Apr 4, 2026-6pm CDT Apr 10, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation