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.

Partly Cloudy

93°F

34°C

Humidity 52%
Wind Speed S 8 mph
Barometer 29.97 in (1013.9 mb)
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index102°F (39°C)
Last update 4 Aug 12:56 pm CDT
Extended Forecast for

5 Miles ENE Fischer TX

  • This Afternoon

    This Afternoon: Sunny, with a high near 97. Heat index values as high as 103. South southeast wind around 10 mph.

    High: 97 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 75. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 75 °F

    Mostly Clear

  • Wednesday

    Wednesday: Partly sunny, then gradually becoming sunny, with a high near 97. Heat index values as high as 105. South wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 97 °F

    Becoming
    Sunny

  • Wednesday Night

    Wednesday Night: Increasing clouds, with a low around 75. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 75 °F

    Increasing
    Clouds

  • Thursday

    Thursday: Mostly sunny, with a high near 97. South wind around 5 mph.

    High: 97 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 74. Southeast wind around 5 mph, with gusts as high as 20 mph.

    Low: 74 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 95. South wind around 5 mph.

    High: 95 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 74. Southeast wind around 5 mph.

    Low: 74 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 94. Calm wind becoming southeast around 5 mph in the afternoon.

    High: 94 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 97. Heat index values as high as 103. South southeast wind around 10 mph.
Tonight
Mostly clear, with a low around 75. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Wednesday
Partly sunny, then gradually becoming sunny, with a high near 97. Heat index values as high as 105. South wind 5 to 10 mph, with gusts as high as 20 mph.
Wednesday Night
Increasing clouds, with a low around 75. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Thursday
Mostly sunny, with a high near 97. South wind around 5 mph.
Thursday Night
Mostly clear, with a low around 74. Southeast wind around 5 mph, with gusts as high as 20 mph.
Friday
Mostly sunny, with a high near 95. South wind around 5 mph.
Friday Night
Mostly clear, with a low around 74. Southeast wind around 5 mph.
Saturday
Mostly sunny, with a high near 94. Calm wind becoming southeast around 5 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 74.
Sunday
Mostly sunny, with a high near 94.
Sunday Night
Mostly clear, with a low around 75.
Monday
Mostly sunny, with a high near 95.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles ENE Fischer TX
 30.01°N 98.21°W (Elev. 997 ft)
Last Update:
12:44 pm CDT Aug 4, 2026
Forecast Valid:
1pm CDT Aug 4, 2026-6pm CDT Aug 10, 2026
 
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