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.

Overcast

70°F

21°C

Humidity 79%
Wind Speed S 15 mph
Barometer 30.07 in (1017.7 mb)
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Last update 26 Mar 8:56 am CDT
Extended Forecast for

3 Miles WSW San Marcos TX

  • Today

    Today: Mostly cloudy early, then gradual clearing, with a high near 88. South wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 88 °F

    Becoming
    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 62. South southeast wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 62 °F

    Increasing
    Clouds

  • Friday

    Friday: Cloudy through mid morning, then gradual clearing, with a high near 88. South wind 5 to 10 mph becoming east in the afternoon.

    High: 88 °F

    Gradual
    Clearing

  • Friday Night

    Friday Night: Increasing clouds, with a low around 59. North northeast wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 59 °F

    Increasing
    Clouds

  • Saturday

    Saturday: Partly sunny, with a high near 78. North northeast wind around 10 mph, with gusts as high as 20 mph.

    High: 78 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 56. East northeast wind around 5 mph becoming south southeast after midnight.

    Low: 56 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 86. Light south wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 20 mph.

    High: 86 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 61. South southeast wind 5 to 10 mph.

    Low: 61 °F

    Partly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 88. South wind 5 to 15 mph, with gusts as high as 25 mph.

    High: 88 °F

    Partly Sunny

Detailed Forecast

Today
Mostly cloudy early, then gradual clearing, with a high near 88. South wind 10 to 15 mph, with gusts as high as 25 mph.
Tonight
Increasing clouds, with a low around 62. South southeast wind 10 to 15 mph, with gusts as high as 25 mph.
Friday
Cloudy through mid morning, then gradual clearing, with a high near 88. South wind 5 to 10 mph becoming east in the afternoon.
Friday Night
Increasing clouds, with a low around 59. North northeast wind 10 to 15 mph, with gusts as high as 20 mph.
Saturday
Partly sunny, with a high near 78. North northeast wind around 10 mph, with gusts as high as 20 mph.
Saturday Night
Mostly clear, with a low around 56. East northeast wind around 5 mph becoming south southeast after midnight.
Sunday
Mostly sunny, with a high near 86. Light south wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 20 mph.
Sunday Night
Partly cloudy, with a low around 61. South southeast wind 5 to 10 mph.
Monday
Partly sunny, with a high near 88. South wind 5 to 15 mph, with gusts as high as 25 mph.
Monday Night
Mostly cloudy, with a low around 63.
Tuesday
Partly sunny, with a high near 89.
Tuesday Night
Mostly cloudy, with a low around 65.
Wednesday
Partly sunny, with a high near 91.
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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:
9:09 am CDT Mar 26, 2026
Forecast Valid:
9am CDT Mar 26, 2026-6pm CDT Apr 1, 2026
 
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