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.

Partly Cloudy

81°F

27°C

Humidity 85%
Wind Speed S 5 mph
Barometer 30.10 in (1018.4 mb)
Dewpoint 76°F (24°C)
Visibility 10.00 mi
Heat Index87°F (31°C)
Last update 9 Sep 1:56 am CDT
Extended Forecast for

Lockhart TX

  • Overnight

    Overnight: Partly cloudy, with a low around 76. South wind around 5 mph becoming calm.

    Low: 76 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 98. Heat index values as high as 105. Calm wind becoming southeast around 5 mph in the afternoon.

    High: 98 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 74. Southeast wind 5 to 10 mph becoming light south after midnight.

    Low: 74 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 98. Heat index values as high as 104. Calm wind becoming south southeast around 5 mph in the afternoon.

    High: 98 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 74. Southeast wind around 5 mph.

    Low: 74 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny and hot, with a high near 100. South wind 5 to 10 mph.

    High: 100 °F

    Hot

  • Friday Night

    Friday Night: Partly cloudy, with a low around 75. South wind 5 to 10 mph.

    Low: 75 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny and hot, with a high near 100. South wind 5 to 15 mph.

    High: 100 °F

    Hot

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 76. South wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 76 °F

    Mostly Clear

Detailed Forecast

Overnight
Partly cloudy, with a low around 76. South wind around 5 mph becoming calm.
Wednesday
Partly sunny, with a high near 98. Heat index values as high as 105. Calm wind becoming southeast around 5 mph in the afternoon.
Wednesday Night
Partly cloudy, with a low around 74. Southeast wind 5 to 10 mph becoming light south after midnight.
Thursday
Mostly sunny, with a high near 98. Heat index values as high as 104. Calm wind becoming south southeast around 5 mph in the afternoon.
Thursday Night
Mostly clear, with a low around 74. Southeast wind around 5 mph.
Friday
Mostly sunny and hot, with a high near 100. South wind 5 to 10 mph.
Friday Night
Partly cloudy, with a low around 75. South wind 5 to 10 mph.
Saturday
Sunny and hot, with a high near 100. South wind 5 to 15 mph.
Saturday Night
Mostly clear, with a low around 76. South wind 10 to 15 mph, with gusts as high as 20 mph.
Sunday
Mostly sunny and hot, with a high near 100.
Sunday Night
Partly cloudy, with a low around 75.
Monday
Mostly sunny and hot, with a high near 99.
Monday Night
Partly cloudy, with a low around 75.
Tuesday
Mostly sunny and hot, with a high near 99.
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ABOUT THIS FORECAST

 
Point Forecast:
Lockhart TX
 29.88°N 97.68°W (Elev. 525 ft)
Last Update:
1:24 am CDT Sep 9, 2026
Forecast Valid:
2am CDT Sep 9, 2026-6pm CDT Sep 15, 2026
 
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Additional Resources

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Chance of Precipitation