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

70°F

21°C

Humidity 18%
Wind Speed NW 5 mph
Barometer 30.25 in (1024.2 mb)
Dewpoint 24°F (-4°C)
Visibility 10.00 mi
Last update 5 Feb 4:56 pm CST
Extended Forecast for

5 Miles WSW Martindale TX

  • Tonight

    Tonight: Clear, with a low around 46. West southwest wind 5 to 10 mph.

    Low: 46 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 80. West wind around 5 mph becoming northeast in the afternoon.

    High: 80 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 47. Calm wind becoming northwest around 5 mph after midnight.

    Low: 47 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 78. North wind around 5 mph becoming southeast in the afternoon.

    High: 78 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 48. Southeast wind around 5 mph becoming calm after midnight.

    Low: 48 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly cloudy, with a high near 76. Calm wind becoming south around 5 mph in the morning.

    High: 76 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 54. South wind around 5 mph becoming calm after midnight.

    Low: 54 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly cloudy, with a high near 78. Light south southwest wind becoming south 5 to 10 mph in the morning.

    High: 78 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: A 30 percent chance of showers, mainly after midnight. Cloudy, with a low around 58. South wind around 5 mph.

    Low: 58 °F

    Chance
    Showers

Detailed Forecast

Tonight
Clear, with a low around 46. West southwest wind 5 to 10 mph.
Friday
Sunny, with a high near 80. West wind around 5 mph becoming northeast in the afternoon.
Friday Night
Clear, with a low around 47. Calm wind becoming northwest around 5 mph after midnight.
Saturday
Sunny, with a high near 78. North wind around 5 mph becoming southeast in the afternoon.
Saturday Night
Partly cloudy, with a low around 48. Southeast wind around 5 mph becoming calm after midnight.
Sunday
Mostly cloudy, with a high near 76. Calm wind becoming south around 5 mph in the morning.
Sunday Night
Mostly cloudy, with a low around 54. South wind around 5 mph becoming calm after midnight.
Monday
Mostly cloudy, with a high near 78. Light south southwest wind becoming south 5 to 10 mph in the morning.
Monday Night
A 30 percent chance of showers, mainly after midnight. Cloudy, with a low around 58. South wind around 5 mph.
Tuesday
A 40 percent chance of showers. Mostly cloudy, with a high near 76.
Tuesday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 55.
Wednesday
Mostly sunny, with a high near 83.
Wednesday Night
Partly cloudy, with a low around 57.
Thursday
Partly sunny, with a high near 79.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles WSW Martindale TX
 29.81°N 97.91°W (Elev. 581 ft)
Last Update:
4:32 pm CST Feb 5, 2026
Forecast Valid:
5pm CST Feb 5, 2026-6pm CST Feb 12, 2026
 
Forecast Discussion
 
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Additional Resources

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National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation