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

73°F

23°C

Humidity 87%
Wind Speed Calm
Barometer 29.85 in (1010.1 mb)
Dewpoint 69°F (21°C)
Visibility 10.00 mi
Last update 9 May 10:56 pm CDT
Extended Forecast for

Lockhart TX

  • Tonight

    Tonight: Mostly clear, with a low around 71. South southeast wind around 5 mph.

    Low: 71 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 91. Southeast wind around 5 mph.

    High: 91 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Showers and thunderstorms before 4am, then a slight chance of showers. Some of the storms could be severe. Low around 68. Southeast wind around 5 mph becoming north after midnight. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 68 °F

    Severe
    Thunderstorms

  • Monday

    Monday: Mostly cloudy, then gradually becoming sunny, with a high near 81. North wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 81 °F

    Decreasing
    Clouds

  • Monday Night

    Monday Night: Partly cloudy, with a low around 64. North northeast wind 5 to 10 mph.

    Low: 64 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 84. Northeast wind around 5 mph.

    High: 84 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 65. East wind around 5 mph becoming calm in the evening.

    Low: 65 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 88. Calm wind becoming southeast around 5 mph in the afternoon.

    High: 88 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 67. Calm wind becoming south around 5 mph.

    Low: 67 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 71. South southeast wind around 5 mph.
Sunday
Mostly sunny, with a high near 91. Southeast wind around 5 mph.
Sunday Night
Showers and thunderstorms before 4am, then a slight chance of showers. Some of the storms could be severe. Low around 68. Southeast wind around 5 mph becoming north after midnight. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Monday
Mostly cloudy, then gradually becoming sunny, with a high near 81. North wind 10 to 15 mph, with gusts as high as 20 mph.
Monday Night
Partly cloudy, with a low around 64. North northeast wind 5 to 10 mph.
Tuesday
Mostly sunny, with a high near 84. Northeast wind around 5 mph.
Tuesday Night
Mostly clear, with a low around 65. East wind around 5 mph becoming calm in the evening.
Wednesday
Sunny, with a high near 88. Calm wind becoming southeast around 5 mph in the afternoon.
Wednesday Night
Mostly clear, with a low around 67. Calm wind becoming south around 5 mph.
Thursday
Mostly sunny, with a high near 90.
Thursday Night
Partly cloudy, with a low around 69.
Friday
Mostly sunny, with a high near 90.
Friday Night
Partly cloudy, with a low around 73.
Saturday
Partly sunny, with a high near 91.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Lockhart TX
 29.88°N 97.68°W (Elev. 525 ft)
Last Update:
11:44 pm CDT May 9, 2026
Forecast Valid:
11pm CDT May 9, 2026-6pm CDT May 16, 2026
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation