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

63°F

17°C

Humidity 70%
Wind Speed SE 5 mph
Barometer 29.93 in (1013.0 mb)
Dewpoint 53°F (12°C)
Visibility 10.00 mi
Last update 4 Nov 7:56 pm CST
Extended Forecast for

3 Miles WSW San Marcos TX

  • Tonight

    Tonight: Clear, with a low around 52. Calm wind.

    Low: 52 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 80. Calm wind becoming south around 5 mph.

    High: 80 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 55. Light and variable wind becoming north northwest 10 to 15 mph after midnight. Winds could gust as high as 25 mph.

    Low: 55 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 73. North wind 10 to 15 mph, with gusts as high as 30 mph.

    High: 73 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 53. North wind 5 to 15 mph, with gusts as high as 20 mph.

    Low: 53 °F

    Partly Cloudy

  • Saturday

    Saturday: A 30 percent chance of showers after noon. Mostly cloudy, with a high near 68. North northeast wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 68 °F

    Partly Sunny
    then Chance
    Showers

  • Saturday Night

    Saturday Night: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 51. North northeast wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 51 °F

    Chance
    Showers

  • Sunday

    Sunday: A chance of showers and thunderstorms. Mostly cloudy, with a high near 65. North northeast wind 5 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 40%.

    High: 65 °F

    Chance
    Showers

  • Sunday Night

    Sunday Night: A 20 percent chance of showers. Partly cloudy, with a low around 48. North northeast wind around 5 mph becoming calm.

    Low: 48 °F

    Slight Chance
    Showers

Detailed Forecast

Tonight
Clear, with a low around 52. Calm wind.
Thursday
Sunny, with a high near 80. Calm wind becoming south around 5 mph.
Thursday Night
Partly cloudy, with a low around 55. Light and variable wind becoming north northwest 10 to 15 mph after midnight. Winds could gust as high as 25 mph.
Friday
Sunny, with a high near 73. North wind 10 to 15 mph, with gusts as high as 30 mph.
Friday Night
Partly cloudy, with a low around 53. North wind 5 to 15 mph, with gusts as high as 20 mph.
Saturday
A 30 percent chance of showers after noon. Mostly cloudy, with a high near 68. North northeast wind 10 to 15 mph, with gusts as high as 20 mph.
Saturday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 51. North northeast wind 10 to 15 mph, with gusts as high as 20 mph.
Sunday
A chance of showers and thunderstorms. Mostly cloudy, with a high near 65. North northeast wind 5 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 40%.
Sunday Night
A 20 percent chance of showers. Partly cloudy, with a low around 48. North northeast wind around 5 mph becoming calm.
Monday
A 20 percent chance of showers. Mostly sunny, with a high near 66.
Monday Night
Partly cloudy, with a low around 48.
Tuesday
Mostly sunny, with a high near 70.
Tuesday Night
Partly cloudy, with a low around 50.
Veterans Day
Mostly sunny, with a high near 73.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles WSW San Marcos TX
 29.86°N 97.97°W (Elev. 646 ft)
Last Update:
5:44 pm CST Nov 4, 2026
Forecast Valid:
8pm CST Nov 4, 2026-6pm CST Nov 11, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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