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

43°F

6°C

Humidity 51%
Wind Speed S 6 mph
Barometer 30.19 in (1022.0 mb)
Dewpoint 26°F (-3°C)
Visibility 10.00 mi
Wind Chill39°F (4°C)
Last update 8 Feb 3:56 am CST
Extended Forecast for

5 Miles SW San Marcos TX

  • Today

    Today: Partly sunny, with a high near 78. South southwest wind 5 to 10 mph.

    High: 78 °F

    Partly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 54. South southwest wind around 5 mph.

    Low: 54 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 80. South southwest wind 5 to 10 mph.

    High: 80 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 59. South wind 5 to 10 mph.

    Low: 59 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A 20 percent chance of showers after noon. Cloudy, with a high near 76. South wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 76 °F

    Cloudy then
    Slight Chance
    Showers

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers before midnight. Mostly cloudy, with a low around 58. South southeast wind around 5 mph.

    Low: 58 °F

    Chance
    Showers then
    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 79. South wind around 5 mph becoming east in the afternoon.

    High: 79 °F

    Mostly Sunny

  • Wednesday Night

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

    Low: 56 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 83. South southwest wind 5 to 10 mph.

    High: 83 °F

    Mostly Sunny

Detailed Forecast

Today
Partly sunny, with a high near 78. South southwest wind 5 to 10 mph.
Tonight
Partly cloudy, with a low around 54. South southwest wind around 5 mph.
Monday
Mostly sunny, with a high near 80. South southwest wind 5 to 10 mph.
Monday Night
Mostly cloudy, with a low around 59. South wind 5 to 10 mph.
Tuesday
A 20 percent chance of showers after noon. Cloudy, with a high near 76. South wind 5 to 10 mph, with gusts as high as 20 mph.
Tuesday Night
A 30 percent chance of showers before midnight. Mostly cloudy, with a low around 58. South southeast wind around 5 mph.
Wednesday
Mostly sunny, with a high near 79. South wind around 5 mph becoming east in the afternoon.
Wednesday Night
Mostly clear, with a low around 56. East southeast wind around 5 mph becoming south southwest after midnight.
Thursday
Mostly sunny, with a high near 83. South southwest wind 5 to 10 mph.
Thursday Night
Mostly cloudy, with a low around 58.
Friday
A 20 percent chance of showers. Partly sunny, with a high near 81.
Friday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 57.
Saturday
A 30 percent chance of showers. Partly sunny, with a high near 78.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles SW San Marcos TX
 29.81°N 97.99°W (Elev. 653 ft)
Last Update:
4:42 am CST Feb 8, 2026
Forecast Valid:
4am CST Feb 8, 2026-6pm CST Feb 14, 2026
 
Forecast Discussion
 
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Additional Resources

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