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.

A Few Clouds

54°F

12°C

Humidity 75%
Wind Speed NE 20 mph
Barometer 30.33 in (1026.8 mb)
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Wind Chill49°F (9°C)
Last update 19 Apr 8:56 am CDT
Extended Forecast for

2 Miles SSW Lockhart TX

  • Today

    Today: Partly sunny, with a high near 73. East northeast wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 73 °F

    Partly Sunny

  • Tonight

    Tonight: A 30 percent chance of showers, mainly after 4am. Mostly cloudy, with a low around 54. East wind around 5 mph becoming calm in the evening.

    Low: 54 °F

    Mostly Cloudy
    then Chance
    Showers

  • Monday

    Monday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 7am. Cloudy, with a high near 67. East northeast wind 5 to 10 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    High: 67 °F

    Showers
    Likely

  • 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 57. East wind around 5 mph becoming calm in the evening. Chance of precipitation is 60%.

    Low: 57 °F

    Showers
    Likely

  • Tuesday

    Tuesday: Showers and possibly a thunderstorm. High near 70. East wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 80%.

    High: 70 °F

    Showers

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers and thunderstorms, mainly before 1am. Cloudy, with a low around 63. Southeast wind 5 to 10 mph.

    Low: 63 °F

    Chance
    Showers

  • Wednesday

    Wednesday: A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 81. Southeast wind 5 to 10 mph.

    High: 81 °F

    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 66. South southeast wind around 10 mph.

    Low: 66 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly cloudy, with a high near 84. South wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 84 °F

    Mostly Cloudy

Detailed Forecast

Today
Partly sunny, with a high near 73. East northeast wind 10 to 15 mph, with gusts as high as 25 mph.
Tonight
A 30 percent chance of showers, mainly after 4am. Mostly cloudy, with a low around 54. East wind around 5 mph becoming calm in the evening.
Monday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 7am. Cloudy, with a high near 67. East northeast wind 5 to 10 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Monday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 57. East wind around 5 mph becoming calm in the evening. Chance of precipitation is 60%.
Tuesday
Showers and possibly a thunderstorm. High near 70. East wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 80%.
Tuesday Night
A 30 percent chance of showers and thunderstorms, mainly before 1am. Cloudy, with a low around 63. Southeast wind 5 to 10 mph.
Wednesday
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 81. Southeast wind 5 to 10 mph.
Wednesday Night
Mostly cloudy, with a low around 66. South southeast wind around 10 mph.
Thursday
Mostly cloudy, with a high near 84. South wind 10 to 15 mph, with gusts as high as 25 mph.
Thursday Night
Mostly cloudy, with a low around 69.
Friday
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 86.
Friday Night
Mostly cloudy, with a low around 64.
Saturday
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 86.
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Forecast Area
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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:
6:42 am CDT Apr 19, 2026
Forecast Valid:
9am CDT Apr 19, 2026-6pm CDT Apr 25, 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