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

60°F

16°C

Humidity 20%
Wind Speed NE 12 mph
Barometer 30.59 in (1036.0 mb)
Dewpoint 19°F (-7°C)
Visibility 10.00 mi
Last update 23 Feb 11:56 am CST
Extended Forecast for

4 Miles WNW San Marcos TX

  • This Afternoon

    This Afternoon: Sunny, with a high near 64. East wind around 5 mph.

    High: 64 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 38. Calm wind becoming south southwest around 5 mph after midnight.

    Low: 38 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 73. South southwest wind 5 to 15 mph, with gusts as high as 30 mph.

    High: 73 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 53. South wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 53 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 85. South southwest wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 85 °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 84. Southwest wind 5 to 10 mph becoming north in the afternoon. Winds could gust as high as 25 mph.

    High: 84 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 51. North wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 51 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 80. North northeast wind around 5 mph becoming southeast in the afternoon.

    High: 80 °F

    Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 64. East wind around 5 mph.
Tonight
Clear, with a low around 38. Calm wind becoming south southwest around 5 mph after midnight.
Tuesday
Sunny, with a high near 73. South southwest wind 5 to 15 mph, with gusts as high as 30 mph.
Tuesday Night
Mostly clear, with a low around 53. South wind 10 to 15 mph, with gusts as high as 25 mph.
Wednesday
Sunny, with a high near 85. 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 84. Southwest wind 5 to 10 mph becoming north in the afternoon. Winds could gust as high as 25 mph.
Thursday Night
Clear, with a low around 51. North wind 5 to 10 mph, with gusts as high as 20 mph.
Friday
Sunny, with a high near 80. North northeast wind around 5 mph becoming southeast in the afternoon.
Friday Night
Mostly clear, with a low around 52.
Saturday
Sunny, with a high near 84.
Saturday Night
Partly cloudy, with a low around 57.
Sunday
Mostly sunny, with a high near 83.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles WNW San Marcos TX
 29.9°N 97.99°W (Elev. 850 ft)
Last Update:
11:56 am CST Feb 23, 2026
Forecast Valid:
12pm CST Feb 23, 2026-6pm CST Mar 1, 2026
 
Forecast Discussion
 
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Additional Resources

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