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

38°F

3°C

Humidity 37%
Wind Speed Calm
Barometer 30.34 in (1027.6 mb)
Dewpoint 14°F (-10°C)
Visibility 10.00 mi
Last update 24 Feb 12:56 am CST
Extended Forecast for

3 Miles WSW San Marcos TX

  • Overnight

    Overnight: Clear, with a low around 39. Southwest wind around 5 mph.

    Low: 39 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 75. South southwest wind 5 to 10 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 30 mph.

    High: 75 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 54. South wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 54 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 86. South southwest wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 86 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 58. South wind 5 to 10 mph.

    Low: 58 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 85. Southwest wind 5 to 15 mph becoming north in the afternoon. Winds could gust as high as 20 mph.

    High: 85 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 54. North wind 5 to 10 mph.

    Low: 54 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 81. North northeast wind around 5 mph becoming east southeast in the afternoon.

    High: 81 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 55. East southeast wind around 5 mph becoming south after midnight.

    Low: 55 °F

    Mostly Clear

Detailed Forecast

Overnight
Clear, with a low around 39. Southwest wind around 5 mph.
Tuesday
Sunny, with a high near 75. South southwest wind 5 to 10 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 30 mph.
Tuesday Night
Mostly clear, with a low around 54. South wind 10 to 15 mph, with gusts as high as 20 mph.
Wednesday
Sunny, with a high near 86. South southwest wind 10 to 15 mph, with gusts as high as 25 mph.
Wednesday Night
Mostly clear, with a low around 58. South wind 5 to 10 mph.
Thursday
Sunny, with a high near 85. Southwest wind 5 to 15 mph becoming north in the afternoon. Winds could gust as high as 20 mph.
Thursday Night
Clear, with a low around 54. North wind 5 to 10 mph.
Friday
Sunny, with a high near 81. North northeast wind around 5 mph becoming east southeast in the afternoon.
Friday Night
Mostly clear, with a low around 55. East southeast wind around 5 mph becoming south after midnight.
Saturday
Sunny, with a high near 84.
Saturday Night
Partly cloudy, with a low around 57.
Sunday
Mostly sunny, with a high near 84.
Sunday Night
Partly cloudy, with a low around 59.
Monday
Partly sunny, with a high near 83.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles WSW San Marcos TX
 29.86°N 97.97°W (Elev. 646 ft)
Last Update:
12:44 am CST Feb 24, 2026
Forecast Valid:
1am CST Feb 24, 2026-6pm CST Mar 2, 2026
 
Forecast Discussion
 
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Additional Resources

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