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

95°F

35°C

Humidity 44%
Wind Speed SE 8 mph
Barometer 30.02 in (1015.5 mb)
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Heat Index101°F (38°C)
Last update 29 Aug 2:56 pm CDT
Extended Forecast for

2 Miles WNW Prairie Lea TX

  • This Afternoon

    This Afternoon: Sunny and hot, with a high near 100. Heat index values as high as 105. South southeast wind around 5 mph.

    High: 100 °F

    Hot

  • Tonight

    Tonight: Mostly clear, with a low around 75. South southeast wind 5 to 10 mph.

    Low: 75 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny and hot, with a high near 100. Heat index values as high as 104. Calm wind becoming south southeast around 5 mph in the afternoon.

    High: 100 °F

    Hot

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 75. South wind 5 to 10 mph.

    Low: 75 °F

    Mostly Clear

  • Monday

    Monday: Sunny and hot, with a high near 100. Calm wind becoming south southeast around 5 mph in the afternoon.

    High: 100 °F

    Hot

  • Monday Night

    Monday Night: Mostly clear, with a low around 75. Southeast wind 5 to 10 mph becoming light south after midnight.

    Low: 75 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny and hot, with a high near 99. Calm wind becoming south southeast around 5 mph in the afternoon.

    High: 99 °F

    Hot

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 75. Southeast wind 5 to 10 mph becoming light south after midnight.

    Low: 75 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 100. Calm wind becoming south southeast around 5 mph in the afternoon.

    High: 100 °F

    Hot

Detailed Forecast

This Afternoon
Sunny and hot, with a high near 100. Heat index values as high as 105. South southeast wind around 5 mph.
Tonight
Mostly clear, with a low around 75. South southeast wind 5 to 10 mph.
Sunday
Sunny and hot, with a high near 100. Heat index values as high as 104. Calm wind becoming south southeast around 5 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 75. South wind 5 to 10 mph.
Monday
Sunny and hot, with a high near 100. Calm wind becoming south southeast around 5 mph in the afternoon.
Monday Night
Mostly clear, with a low around 75. Southeast wind 5 to 10 mph becoming light south after midnight.
Tuesday
Sunny and hot, with a high near 99. Calm wind becoming south southeast around 5 mph in the afternoon.
Tuesday Night
Mostly clear, with a low around 75. Southeast wind 5 to 10 mph becoming light south after midnight.
Wednesday
Sunny and hot, with a high near 100. Calm wind becoming south southeast around 5 mph in the afternoon.
Wednesday Night
Mostly clear, with a low around 75.
Thursday
Sunny and hot, with a high near 101.
Thursday Night
Mostly clear, with a low around 75.
Friday
Mostly sunny and hot, with a high near 100.
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles WNW Prairie Lea TX
 29.72°N 97.75°W (Elev. 407 ft)
Last Update:
2:46 pm CDT Aug 29, 2026
Forecast Valid:
3pm CDT Aug 29, 2026-6pm CDT Sep 4, 2026
 
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Additional Resources

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