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

61°F

16°C

Humidity 93%
Wind Speed NE 9 mph
Barometer 30.19 in (1022.2 mb)
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 8 Nov 6:56 pm CST
Extended Forecast for

San Marcos TX

  • Tonight

    Tonight: Showers, mainly after 9pm. Low around 57. North northeast wind 5 to 10 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 57 °F

    Showers

  • Monday

    Monday: Showers, mainly before 3pm. High near 65. Northeast wind around 5 mph becoming calm in the afternoon. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 65 °F

    Showers

  • Monday Night

    Monday Night: A 30 percent chance of showers before midnight. Mostly cloudy, with a low around 57. Calm wind.

    Low: 57 °F

    Chance
    Showers then
    Partly Cloudy

  • Tuesday

    Tuesday: A 20 percent chance of showers before noon. Partly sunny, with a high near 71. Calm wind.

    High: 71 °F

    Slight Chance
    Showers then
    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 58. Calm wind.

    Low: 58 °F

    Mostly Cloudy

  • Veterans Day

    Veterans Day: Mostly cloudy, with a high near 77. Calm wind.

    High: 77 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 56. Light and variable wind becoming north northwest 5 to 10 mph after midnight.

    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: Mostly clear, with a low around 49. Calm wind becoming north northwest around 5 mph.

    Low: 49 °F

    Mostly Clear

Detailed Forecast

Tonight
Showers, mainly after 9pm. Low around 57. North northeast wind 5 to 10 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Monday
Showers, mainly before 3pm. High near 65. Northeast wind around 5 mph becoming calm in the afternoon. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Monday Night
A 30 percent chance of showers before midnight. Mostly cloudy, with a low around 57. Calm wind.
Tuesday
A 20 percent chance of showers before noon. Partly sunny, with a high near 71. Calm wind.
Tuesday Night
Mostly cloudy, with a low around 58. Calm wind.
Veterans Day
Mostly cloudy, with a high near 77. Calm wind.
Wednesday Night
Partly cloudy, with a low around 56. Light and variable wind becoming north northwest 5 to 10 mph after midnight.
Thursday
Sunny, with a high near 74. North wind 5 to 10 mph, with gusts as high as 20 mph.
Thursday Night
Mostly clear, with a low around 49. Calm wind becoming north northwest around 5 mph.
Friday
Sunny, with a high near 70.
Friday Night
Clear, with a low around 47.
Saturday
Sunny, with a high near 70.
Saturday Night
A 20 percent chance of showers. Mostly clear, with a low around 51.
Sunday
A 20 percent chance of showers. Mostly sunny, with a high near 71.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
San Marcos TX
 29.88°N 97.94°W (Elev. 577 ft)
Last Update:
6:52 pm CST Nov 8, 2026
Forecast Valid:
7pm CST Nov 8, 2026-6pm CST Nov 15, 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