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.

Overcast

56°F

13°C

Humidity 67%
Wind Speed N 18 mph
Barometer 30.26 in (1024.5 mb)
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Last update 11 Feb 8:56 am CST
Extended Forecast for

San Marcos TX

  • Today

    Today: Mostly sunny, with a high near 75. North wind 5 to 10 mph.

    High: 75 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 53. Northeast wind around 5 mph becoming calm in the evening.

    Low: 53 °F

    Partly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 80. Calm wind becoming south around 5 mph in the afternoon.

    High: 80 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 60. South wind around 5 mph.

    Low: 60 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly cloudy, with a high near 81. South southeast wind 5 to 10 mph.

    High: 81 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: Showers likely after midnight. Mostly cloudy, with a low around 63. South southeast wind around 10 mph. Chance of precipitation is 60%.

    Low: 63 °F

    Mostly Cloudy
    then Showers
    Likely

  • Saturday

    Saturday: Showers and possibly a thunderstorm. High near 80. South wind around 10 mph becoming west northwest in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 90%.

    High: 80 °F

    Showers

  • Saturday Night

    Saturday Night: A 20 percent chance of showers before midnight. Mostly clear, with a low around 54. West northwest wind around 10 mph, with gusts as high as 20 mph.

    Low: 54 °F

    Slight Chance
    Showers then
    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 74. North wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 74 °F

    Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 75. North wind 5 to 10 mph.
Tonight
Partly cloudy, with a low around 53. Northeast wind around 5 mph becoming calm in the evening.
Thursday
Partly sunny, with a high near 80. Calm wind becoming south around 5 mph in the afternoon.
Thursday Night
Mostly cloudy, with a low around 60. South wind around 5 mph.
Friday
Mostly cloudy, with a high near 81. South southeast wind 5 to 10 mph.
Friday Night
Showers likely after midnight. Mostly cloudy, with a low around 63. South southeast wind around 10 mph. Chance of precipitation is 60%.
Saturday
Showers and possibly a thunderstorm. High near 80. South wind around 10 mph becoming west northwest in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 90%.
Saturday Night
A 20 percent chance of showers before midnight. Mostly clear, with a low around 54. West northwest wind around 10 mph, with gusts as high as 20 mph.
Sunday
Sunny, with a high near 74. North wind 5 to 10 mph, with gusts as high as 20 mph.
Sunday Night
Clear, with a low around 48.
Washington's Birthday
Sunny, with a high near 77.
Monday Night
Partly cloudy, with a low around 54.
Tuesday
Partly sunny, with a high near 81.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
San Marcos TX
 29.88°N 97.94°W (Elev. 577 ft)
Last Update:
5:46 am CST Feb 11, 2026
Forecast Valid:
9am CST Feb 11, 2026-6pm CST Feb 17, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation