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

64°F

18°C

Humidity 81%
Wind Speed N 5 mph
Barometer 30.19 in (1021.9 mb)
Dewpoint 58°F (14°C)
Visibility 10.00 mi
Last update 9 Nov 2:56 pm CST
Extended Forecast for

2 Miles WSW San Marcos TX

  • This Afternoon

    This Afternoon: A 40 percent chance of showers. Mostly cloudy, with a high near 66. Northeast wind around 5 mph becoming calm.

    High: 66 °F

    Chance
    Showers

  • Tonight

    Tonight: A 20 percent chance of showers before 9pm. Patchy fog after 3am. Otherwise, mostly cloudy, with a low around 55. Calm wind.

    Low: 55 °F

    Slight Chance
    Showers then
    Patchy Fog

  • Tuesday

    Tuesday: Patchy fog before 9am. Otherwise, partly sunny, with a high near 70. Calm wind.

    High: 70 °F

    Patchy Fog
    then Mostly
    Sunny

  • Tuesday Night

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

    Low: 57 °F

    Partly Cloudy

  • Veterans Day

    Veterans Day: Partly sunny, with a high near 76. Calm wind.

    High: 76 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 56. Light northwest wind becoming north northwest 5 to 10 mph after midnight.

    Low: 56 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 75. North wind 5 to 10 mph becoming light in the afternoon.

    High: 75 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 50. Calm wind becoming west northwest around 5 mph.

    Low: 50 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 75. Northwest wind around 5 mph becoming calm.

    High: 75 °F

    Sunny

Detailed Forecast

This Afternoon
A 40 percent chance of showers. Mostly cloudy, with a high near 66. Northeast wind around 5 mph becoming calm.
Tonight
A 20 percent chance of showers before 9pm. Patchy fog after 3am. Otherwise, mostly cloudy, with a low around 55. Calm wind.
Tuesday
Patchy fog before 9am. Otherwise, partly sunny, with a high near 70. Calm wind.
Tuesday Night
Partly cloudy, with a low around 57. Calm wind.
Veterans Day
Partly sunny, with a high near 76. Calm wind.
Wednesday Night
Mostly clear, with a low around 56. Light northwest wind becoming north northwest 5 to 10 mph after midnight.
Thursday
Sunny, with a high near 75. North wind 5 to 10 mph becoming light in the afternoon.
Thursday Night
Clear, with a low around 50. Calm wind becoming west northwest around 5 mph.
Friday
Sunny, with a high near 75. Northwest wind around 5 mph becoming calm.
Friday Night
Mostly clear, with a low around 50.
Saturday
A 20 percent chance of showers. Mostly sunny, with a high near 73.
Saturday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 56.
Sunday
A 40 percent chance of showers. Partly sunny, with a high near 70.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles WSW San Marcos TX
 29.88°N 97.97°W (Elev. 699 ft)
Last Update:
3:42 pm CST Nov 9, 2026
Forecast Valid:
3pm CST Nov 9, 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