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.

Mostly Cloudy

78°F

26°C

Humidity 93%
Wind Speed S 8 mph
Barometer 30.08 in (1017.9 mb)
Dewpoint 76°F (24°C)
Visibility 10.00 mi
Heat Index81°F (27°C)
Last update 3 Jul 7:56 am CDT
Extended Forecast for

2 Miles WSW San Marcos TX

  • Today

    Today: Mostly cloudy, then gradually becoming sunny, with a high near 94. Heat index values as high as 101. South wind 5 to 10 mph.

    High: 94 °F

    Decreasing
    Clouds

  • Tonight

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

    Low: 75 °F

    Mostly Clear

  • Independence Day

    Independence Day: Mostly cloudy, then gradually becoming sunny, with a high near 95. Heat index values as high as 100. South southeast wind around 5 mph.

    High: 95 °F

    Decreasing
    Clouds

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 75. South southeast wind 5 to 10 mph.

    Low: 75 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 96. South southeast wind around 5 mph.

    High: 96 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 75. South southeast wind around 5 mph.

    Low: 75 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 96. South southwest wind around 5 mph.

    High: 96 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 75. South southeast wind around 5 mph.

    Low: 75 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 96. South southwest wind around 5 mph.

    High: 96 °F

    Mostly Sunny

Detailed Forecast

Today
Mostly cloudy, then gradually becoming sunny, with a high near 94. Heat index values as high as 101. South wind 5 to 10 mph.
Tonight
Mostly clear, with a low around 75. South southeast wind 5 to 10 mph.
Independence Day
Mostly cloudy, then gradually becoming sunny, with a high near 95. Heat index values as high as 100. South southeast wind around 5 mph.
Saturday Night
Partly cloudy, with a low around 75. South southeast wind 5 to 10 mph.
Sunday
Mostly sunny, with a high near 96. South southeast wind around 5 mph.
Sunday Night
Partly cloudy, with a low around 75. South southeast wind around 5 mph.
Monday
Mostly sunny, with a high near 96. South southwest wind around 5 mph.
Monday Night
Partly cloudy, with a low around 75. South southeast wind around 5 mph.
Tuesday
Mostly sunny, with a high near 96. South southwest wind around 5 mph.
Tuesday Night
Partly cloudy, with a low around 75.
Wednesday
Mostly sunny, with a high near 97.
Wednesday Night
Mostly clear, with a low around 76.
Thursday
Mostly sunny, with a high near 98.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles WSW San Marcos TX
 29.86°N 97.97°W (Elev. 646 ft)
Last Update:
6:44 am CDT Jul 3, 2026
Forecast Valid:
8am CDT Jul 3, 2026-6pm CDT Jul 9, 2026
 
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Additional Resources

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Chance of Precipitation