Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Overcast

64°F

18°C

Humidity 96%
Wind Speed SE 8 mph
Barometer 30.09 in (1018.5 mb)
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Last update 22 Apr 12:56 am CDT
Extended Forecast for

San Marcos Municipal Airport TX

  • Overnight

    Overnight: A 30 percent chance of showers.  Patchy fog.  Otherwise, cloudy, with a low around 63. East southeast wind around 5 mph.

    Low: 63 °F

    Chance
    Showers and
    Patchy Fog

  • Wednesday

    Wednesday: A chance of showers, with thunderstorms also possible after 1pm.  Areas of fog before 11am.  Otherwise, mostly cloudy, with a high near 81. South wind 5 to 10 mph.  Chance of precipitation is 40%.

    High: 81 °F

    Chance
    Showers and
    Areas Fog
    then Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 66. South wind 5 to 10 mph.

    Low: 66 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly cloudy, with a high near 83. South wind 5 to 15 mph, with gusts as high as 20 mph.

    High: 83 °F

    Mostly Cloudy

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 68. South southeast wind around 10 mph, with gusts as high as 20 mph.

    Low: 68 °F

    Mostly Cloudy

  • Friday

    Friday: A 20 percent chance of showers and thunderstorms after 1pm.  Mostly cloudy, with a high near 85. South wind 5 to 10 mph.

    High: 85 °F

    Mostly Cloudy
    then Slight
    Chance
    T-storms

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 69. South wind 5 to 10 mph.

    Low: 69 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 89. South southeast wind 5 to 10 mph.

    High: 89 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 70. South southeast wind around 5 mph.

    Low: 70 °F

    Mostly Cloudy

Detailed Forecast

Overnight
A 30 percent chance of showers. Patchy fog. Otherwise, cloudy, with a low around 63. East southeast wind around 5 mph.
Wednesday
A chance of showers, with thunderstorms also possible after 1pm. Areas of fog before 11am. Otherwise, mostly cloudy, with a high near 81. South wind 5 to 10 mph. Chance of precipitation is 40%.
Wednesday Night
Mostly cloudy, with a low around 66. South wind 5 to 10 mph.
Thursday
Mostly cloudy, with a high near 83. South wind 5 to 15 mph, with gusts as high as 20 mph.
Thursday Night
Mostly cloudy, with a low around 68. South southeast wind around 10 mph, with gusts as high as 20 mph.
Friday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 85. South wind 5 to 10 mph.
Friday Night
Mostly cloudy, with a low around 69. South wind 5 to 10 mph.
Saturday
Partly sunny, with a high near 89. South southeast wind 5 to 10 mph.
Saturday Night
Mostly cloudy, with a low around 70. South southeast wind around 5 mph.
Sunday
Mostly cloudy, with a high near 90.
Sunday Night
Mostly cloudy, with a low around 71.
Monday
Partly sunny, with a high near 92.
Monday Night
Partly cloudy, with a low around 68.
Tuesday
Partly sunny, with a high near 92.
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ABOUT THIS FORECAST

 
Point Forecast:
San Marcos Municipal Airport TX
 29.88°N 97.86°W (Elev. 600 ft)
12:44 am CDT Apr 22, 2026
1am CDT Apr 22, 2026-6pm CDT Apr 28, 2026
 
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Additional Resources

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