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

58°F

14°C

Humidity 97%
Wind Speed S 6 mph
Barometer 30.07 in (1017.5 mb)
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Last update 13 Feb 2:56 am CST
Extended Forecast for

2 Miles W San Marcos Municipal Airport TX

  • Overnight

    Overnight: Patchy dense fog. Otherwise, mostly cloudy, with a low around 56. Calm wind becoming south around 5 mph.

    Low: 56 °F

    Patchy Dense
    Fog

  • Friday

    Friday: Patchy dense fog before 9am. Otherwise, mostly cloudy, with a high near 80. Light south wind becoming south southeast 5 to 10 mph in the morning. Winds could gust as high as 20 mph.

    High: 80 °F

    Patchy Dense
    Fog then
    Partly Sunny

  • Friday Night

    Friday Night: A 30 percent chance of showers, mainly between midnight and 3am. Mostly cloudy, with a low around 63. South southeast wind around 10 mph, with gusts as high as 20 mph.

    Low: 63 °F

    Mostly Cloudy
    then Chance
    Showers

  • Saturday

    Saturday: Showers likely, then showers and possibly a thunderstorm after 9am. High near 75. South southeast wind 10 to 15 mph becoming west southwest in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 80%.

    High: 75 °F

    Showers

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms before 9pm, then a chance of showers between 9pm and midnight. Mostly clear, with a low around 55. West wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.

    Low: 55 °F

    Chance
    Showers then
    Clear

  • Sunday

    Sunday: Sunny, with a high near 75. North northwest wind 10 to 15 mph, with gusts as high as 30 mph.

    High: 75 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 47. North wind around 5 mph becoming calm in the evening.

    Low: 47 °F

    Mostly Clear

  • Washington's Birthday

    Washington's Birthday: Sunny, with a high near 78. Calm wind becoming south southeast around 5 mph in the afternoon.

    High: 78 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 50. South southeast wind around 5 mph.

    Low: 50 °F

    Mostly Clear

Detailed Forecast

Overnight
Patchy dense fog. Otherwise, mostly cloudy, with a low around 56. Calm wind becoming south around 5 mph.
Friday
Patchy dense fog before 9am. Otherwise, mostly cloudy, with a high near 80. Light south wind becoming south southeast 5 to 10 mph in the morning. Winds could gust as high as 20 mph.
Friday Night
A 30 percent chance of showers, mainly between midnight and 3am. Mostly cloudy, with a low around 63. South southeast wind around 10 mph, with gusts as high as 20 mph.
Saturday
Showers likely, then showers and possibly a thunderstorm after 9am. High near 75. South southeast wind 10 to 15 mph becoming west southwest in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 80%.
Saturday Night
A chance of showers and thunderstorms before 9pm, then a chance of showers between 9pm and midnight. Mostly clear, with a low around 55. West wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.
Sunday
Sunny, with a high near 75. North northwest wind 10 to 15 mph, with gusts as high as 30 mph.
Sunday Night
Mostly clear, with a low around 47. North wind around 5 mph becoming calm in the evening.
Washington's Birthday
Sunny, with a high near 78. Calm wind becoming south southeast around 5 mph in the afternoon.
Monday Night
Mostly clear, with a low around 50. South southeast wind around 5 mph.
Tuesday
Partly sunny, with a high near 83.
Tuesday Night
Mostly cloudy, with a low around 56.
Wednesday
Partly sunny, with a high near 84.
Wednesday Night
Partly cloudy, with a low around 57.
Thursday
Partly sunny, with a high near 85.
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Forecast Area
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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:
3:42 am CST Feb 13, 2026
Forecast Valid:
3am CST Feb 13, 2026-6pm CST Feb 19, 2026
 
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Additional Resources

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Chance of Precipitation