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

71°F

22°C

Humidity 100%
Wind Speed S 5 mph
Barometer 29.93 in (1012.7 mb)
Dewpoint 71°F (22°C)
Visibility 10.00 mi
Last update 17 Jun 4:56 am CDT
Extended Forecast for

2 Miles W San Marcos Municipal Airport TX

  • Today

    Today: Mostly sunny, with a high near 96. Heat index values as high as 105. South wind 5 to 15 mph, with gusts as high as 25 mph.

    High: 96 °F

    Mostly Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 75. South wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 75 °F

    Increasing
    Clouds

  • Wednesday

    Wednesday: Mostly cloudy, then gradually becoming sunny, with a high near 96. Heat index values as high as 106. South wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 96 °F

    Decreasing
    Clouds

  • Wednesday Night

    Wednesday Night: Increasing clouds, with a low around 75. South southeast wind 5 to 15 mph, with gusts as high as 25 mph.

    Low: 75 °F

    Increasing
    Clouds

  • Juneteenth

    Juneteenth: Mostly sunny, with a high near 94. South wind 5 to 10 mph.

    High: 94 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 74. Southeast wind 5 to 10 mph.

    Low: 74 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 94. Light south wind becoming south southeast 5 to 10 mph in the morning. Winds could gust as high as 20 mph.

    High: 94 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 73. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 73 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 94. South wind 5 to 15 mph, with gusts as high as 20 mph.

    High: 94 °F

    Mostly Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 96. Heat index values as high as 105. South wind 5 to 15 mph, with gusts as high as 25 mph.
Tonight
Increasing clouds, with a low around 75. South wind 10 to 15 mph, with gusts as high as 25 mph.
Wednesday
Mostly cloudy, then gradually becoming sunny, with a high near 96. Heat index values as high as 106. South wind 10 to 15 mph, with gusts as high as 25 mph.
Wednesday Night
Increasing clouds, with a low around 75. South southeast wind 5 to 15 mph, with gusts as high as 25 mph.
Juneteenth
Mostly sunny, with a high near 94. South wind 5 to 10 mph.
Thursday Night
Partly cloudy, with a low around 74. Southeast wind 5 to 10 mph.
Friday
Mostly sunny, with a high near 94. Light south wind becoming south southeast 5 to 10 mph in the morning. Winds could gust as high as 20 mph.
Friday Night
Mostly clear, with a low around 73. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Saturday
Mostly sunny, with a high near 94. South wind 5 to 15 mph, with gusts as high as 20 mph.
Saturday Night
Partly cloudy, with a low around 74.
Sunday
Mostly sunny, with a high near 94.
Sunday Night
Partly cloudy, with a low around 74.
Monday
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 93.
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles W San Marcos Municipal Airport TX
 29.9°N 97.91°W (Elev. 640 ft)
Last Update:
2:42 am CDT Jun 17, 2025
Forecast Valid:
5am CDT Jun 17, 2025-6pm CDT Jun 23, 2025
 
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