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 31%
Wind Speed E 5 mph
Barometer 30.16 in (1020.8 mb)
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 19 Oct 5:56 pm CDT
Extended Forecast for

2 Miles WNW San Marcos Municipal Airport TX

  • Tonight

    Tonight: Mostly clear, with a low around 56. East southeast wind around 5 mph becoming calm.

    Low: 56 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 83. Calm wind becoming east northeast around 5 mph in the afternoon.

    High: 83 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 56. East northeast wind around 5 mph becoming calm.

    Low: 56 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 84. Calm wind becoming east northeast around 5 mph in the afternoon.

    High: 84 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 58. East wind around 5 mph becoming calm.

    Low: 58 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 85. Calm wind becoming east around 5 mph in the afternoon.

    High: 85 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 57. East wind around 5 mph becoming calm.

    Low: 57 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 85. Light and variable wind becoming southeast 5 to 10 mph in the afternoon.

    High: 85 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 61. East southeast wind around 5 mph becoming calm in the evening.

    Low: 61 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 56. East southeast wind around 5 mph becoming calm.
Tuesday
Sunny, with a high near 83. Calm wind becoming east northeast around 5 mph in the afternoon.
Tuesday Night
Clear, with a low around 56. East northeast wind around 5 mph becoming calm.
Wednesday
Sunny, with a high near 84. Calm wind becoming east northeast around 5 mph in the afternoon.
Wednesday Night
Clear, with a low around 58. East wind around 5 mph becoming calm.
Thursday
Sunny, with a high near 85. Calm wind becoming east around 5 mph in the afternoon.
Thursday Night
Mostly clear, with a low around 57. East wind around 5 mph becoming calm.
Friday
Sunny, with a high near 85. Light and variable wind becoming southeast 5 to 10 mph in the afternoon.
Friday Night
Mostly clear, with a low around 61. East southeast wind around 5 mph becoming calm in the evening.
Saturday
Mostly sunny, with a high near 86.
Saturday Night
Partly cloudy, with a low around 63.
Sunday
Partly sunny, with a high near 83.
Sunday Night
Mostly cloudy, with a low around 60.
Monday
Partly sunny, with a high near 82.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles WNW San Marcos Municipal Airport TX
 29.9°N 97.89°W (Elev. 604 ft)
Last Update:
5:32 pm CDT Oct 19, 2026
Forecast Valid:
6pm CDT Oct 19, 2026-6pm CDT Oct 26, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation