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

78°F

26°C

Humidity 76%
Wind Speed E 7 mph
Barometer 29.92 in (1012.4 mb)
Dewpoint 70°F (21°C)
Visibility 9.00 mi
Heat Index80°F (27°C)
Last update 23 May 7:56 pm CDT
Extended Forecast for

2 Miles SSW Lockhart TX

  • Tonight

    Tonight: A slight chance of showers and thunderstorms before 1am, then a slight chance of showers between 1am and 4am. Partly cloudy, with a low around 68. East northeast wind around 5 mph becoming calm. Chance of precipitation is 20%.

    Low: 68 °F

    Slight Chance
    T-storms

  • Sunday

    Sunday: A 20 percent chance of showers and thunderstorms after 1pm. Partly sunny, then gradually becoming sunny, with a high near 84. Calm wind becoming northeast around 5 mph in the afternoon.

    High: 84 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Sunday Night

    Sunday Night: Increasing clouds, with a low around 68. East northeast wind around 5 mph becoming calm in the evening.

    Low: 68 °F

    Increasing
    Clouds

  • Memorial Day

    Memorial Day: Mostly cloudy, then gradually becoming sunny, with a high near 86. Calm wind becoming northeast around 5 mph in the morning.

    High: 86 °F

    Decreasing
    Clouds

  • Monday Night

    Monday Night: Partly cloudy, with a low around 69. East wind around 5 mph becoming calm in the evening.

    Low: 69 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 87. Calm wind becoming southeast around 5 mph in the afternoon.

    High: 87 °F

    Mostly Sunny
    then Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1am. Some of the storms could produce heavy rainfall. Low around 69. South southeast wind around 5 mph. Chance of precipitation is 80%.

    Low: 69 °F

    Chance
    T-storms then
    Heavy Rain

  • Wednesday

    Wednesday: Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 84. South southeast wind 5 to 10 mph. Chance of precipitation is 70%.

    High: 84 °F

    Showers
    Likely

  • Wednesday Night

    Wednesday Night: A 40 percent chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 70. Southeast wind around 5 mph becoming calm in the evening.

    Low: 70 °F

    Chance
    Showers

Detailed Forecast

Tonight
A slight chance of showers and thunderstorms before 1am, then a slight chance of showers between 1am and 4am. Partly cloudy, with a low around 68. East northeast wind around 5 mph becoming calm. Chance of precipitation is 20%.
Sunday
A 20 percent chance of showers and thunderstorms after 1pm. Partly sunny, then gradually becoming sunny, with a high near 84. Calm wind becoming northeast around 5 mph in the afternoon.
Sunday Night
Increasing clouds, with a low around 68. East northeast wind around 5 mph becoming calm in the evening.
Memorial Day
Mostly cloudy, then gradually becoming sunny, with a high near 86. Calm wind becoming northeast around 5 mph in the morning.
Monday Night
Partly cloudy, with a low around 69. East wind around 5 mph becoming calm in the evening.
Tuesday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 87. Calm wind becoming southeast around 5 mph in the afternoon.
Tuesday Night
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1am. Some of the storms could produce heavy rainfall. Low around 69. South southeast wind around 5 mph. Chance of precipitation is 80%.
Wednesday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 84. South southeast wind 5 to 10 mph. Chance of precipitation is 70%.
Wednesday Night
A 40 percent chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 70. Southeast wind around 5 mph becoming calm in the evening.
Thursday
Partly sunny, with a high near 88.
Thursday Night
Partly cloudy, with a low around 72.
Friday
Partly sunny, with a high near 91.
Friday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 73.
Saturday
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 89.
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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:
8:14 pm CDT May 23, 2026
Forecast Valid:
8pm CDT May 23, 2026-6pm CDT May 30, 2026
 
Forecast Discussion
 
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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