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.

Partly Cloudy

60°F

16°C

Humidity 93%
Wind Speed E 10 mph
Barometer 30.24 in (1023.8 mb)
Dewpoint 58°F (14°C)
Visibility 10.00 mi
Last update 9 Nov 9:56 am CST
Extended Forecast for

4 Miles SW San Marcos TX

  • Today

    Today: Showers likely. Mostly cloudy, with a high near 65. Northeast wind around 5 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 65 °F

    Showers
    Likely

  • Tonight

    Tonight: A 20 percent chance of showers before midnight. Patchy fog after 3am. Otherwise, mostly cloudy, with a low around 56. Northeast wind around 5 mph becoming calm.

    Low: 56 °F

    Slight Chance
    Showers then
    Patchy Fog

  • Tuesday

    Tuesday: Patchy fog before 9am. Otherwise, partly sunny, with a high near 71. Calm wind.

    High: 71 °F

    Patchy Fog
    then Partly
    Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 57. Calm wind.

    Low: 57 °F

    Mostly Cloudy

  • Veterans Day

    Veterans Day: Partly sunny, with a high near 78. Calm wind.

    High: 78 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 56. Light and variable wind becoming north 5 to 10 mph after midnight. Winds could gust as high as 20 mph.

    Low: 56 °F

    Partly Cloudy

  • Thursday

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

    High: 74 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 48. Calm wind becoming northwest around 5 mph.

    Low: 48 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 71. North wind around 5 mph becoming calm.

    High: 71 °F

    Sunny

Detailed Forecast

Today
Showers likely. Mostly cloudy, with a high near 65. Northeast wind around 5 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Tonight
A 20 percent chance of showers before midnight. Patchy fog after 3am. Otherwise, mostly cloudy, with a low around 56. Northeast wind around 5 mph becoming calm.
Tuesday
Patchy fog before 9am. Otherwise, partly sunny, with a high near 71. Calm wind.
Tuesday Night
Mostly cloudy, with a low around 57. Calm wind.
Veterans Day
Partly sunny, with a high near 78. Calm wind.
Wednesday Night
Partly cloudy, with a low around 56. Light and variable wind becoming north 5 to 10 mph after midnight. Winds could gust as high as 20 mph.
Thursday
Sunny, with a high near 74. North wind 5 to 10 mph, with gusts as high as 20 mph.
Thursday Night
Clear, with a low around 48. Calm wind becoming northwest around 5 mph.
Friday
Sunny, with a high near 71. North wind around 5 mph becoming calm.
Friday Night
Clear, with a low around 46.
Saturday
Sunny, with a high near 71.
Saturday Night
A 20 percent chance of showers. Partly cloudy, with a low around 53.
Sunday
A 40 percent chance of showers. Partly sunny, with a high near 69.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SW San Marcos TX
 29.83°N 97.96°W (Elev. 630 ft)
Last Update:
10:32 am CST Nov 9, 2026
Forecast Valid:
10am CST Nov 9, 2026-6pm CST Nov 15, 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