National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Fair

73°F

23°C

Humidity 46%
Wind Speed S 5 mph
Barometer 29.82 in (1009.1 mb)
Dewpoint 51°F (11°C)
Visibility 10.00 mi
Last update 12 May 10:56 pm CDT
Extended Forecast for

4 Miles SW San Marcos TX

Heat Advisory May 13, 01:00pm until May 14, 09:00pm
Click here for hazard details and duration
Heat Advisory

  • Tonight

    Tonight: Partly cloudy, with a low around 62. South southwest wind around 5 mph.

    Low: 62 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny and hot, with a high near 102. South southwest wind 5 to 15 mph, with gusts as high as 25 mph.

    High: 102 °F

    Hot

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 68. South wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 68 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny and hot, with a high near 106. South southwest wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 106 °F

    Hot

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 71. South wind 5 to 15 mph, with gusts as high as 20 mph.

    Low: 71 °F

    Partly Cloudy

  • Thursday

    Thursday: Partly sunny and hot, with a high near 102. South wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 102 °F

    Hot

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 72. Southeast wind 5 to 10 mph.

    Low: 72 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny and hot, with a high near 101. South wind 5 to 15 mph, with gusts as high as 20 mph.

    High: 101 °F

    Hot

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 73. South southeast wind 5 to 10 mph.

    Low: 73 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Partly cloudy, with a low around 62. South southwest wind around 5 mph.
Tuesday
Sunny and hot, with a high near 102. South southwest wind 5 to 15 mph, with gusts as high as 25 mph.
Tuesday Night
Mostly clear, with a low around 68. South wind 10 to 15 mph, with gusts as high as 20 mph.
Wednesday
Mostly sunny and hot, with a high near 106. South southwest wind 5 to 10 mph, with gusts as high as 20 mph.
Wednesday Night
Partly cloudy, with a low around 71. South wind 5 to 15 mph, with gusts as high as 20 mph.
Thursday
Partly sunny and hot, with a high near 102. South wind 5 to 10 mph, with gusts as high as 20 mph.
Thursday Night
Mostly cloudy, with a low around 72. Southeast wind 5 to 10 mph.
Friday
Partly sunny and hot, with a high near 101. South wind 5 to 15 mph, with gusts as high as 20 mph.
Friday Night
Mostly cloudy, with a low around 73. South southeast wind 5 to 10 mph.
Saturday
Mostly sunny and hot, with a high near 101.
Saturday Night
Mostly cloudy, with a low around 73.
Sunday
Partly sunny and hot, with a high near 99.
Sunday Night
Partly cloudy, with a low around 74.
Monday
A 20 percent chance of showers. Partly sunny and hot, with a high near 99.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SW San Marcos TX
 29.83°N 97.96°W (Elev. 630 ft)
Last Update:
4:50 pm CDT May 12, 2025
Forecast Valid:
11pm CDT May 12, 2025-6pm CDT May 19, 2025
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation