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

62°F

17°C

Humidity 65%
Wind Speed N 14 mph
Barometer 30.13 in (1019.9 mb)
Dewpoint 50°F (10°C)
Visibility 10.00 mi
Last update 6 Nov 8:56 am CST
Extended Forecast for

3 Miles SSW Manchaca TX

  • Today

    Today: Sunny, with a high near 75. North wind 5 to 15 mph, with gusts as high as 25 mph.

    High: 75 °F

    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 56. North wind 5 to 10 mph.

    Low: 56 °F

    Increasing
    Clouds

  • Saturday

    Saturday: A 20 percent chance of showers after 3pm. Cloudy, with a high near 70. Northeast wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 70 °F

    Cloudy then
    Slight Chance
    Showers

  • Saturday Night

    Saturday Night: Showers likely, mainly after midnight. Mostly cloudy, with a low around 53. North northeast wind 5 to 10 mph. Chance of precipitation is 60%.

    Low: 53 °F

    Showers
    Likely

  • Sunday

    Sunday: Showers likely, mainly before noon. Mostly cloudy, with a high near 64. Northeast wind 5 to 10 mph. Chance of precipitation is 70%.

    High: 64 °F

    Showers
    Likely

  • Sunday Night

    Sunday Night: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 50. Northeast wind around 5 mph becoming calm.

    Low: 50 °F

    Chance
    Showers

  • Monday

    Monday: A chance of showers and thunderstorms. Mostly cloudy, with a high near 65. North wind around 5 mph becoming calm. Chance of precipitation is 50%.

    High: 65 °F

    Chance
    Showers

  • Monday Night

    Monday Night: A 20 percent chance of showers before midnight. Mostly cloudy, with a low around 49. Calm wind.

    Low: 49 °F

    Slight Chance
    Showers then
    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 69. Calm wind.

    High: 69 °F

    Partly Sunny

Detailed Forecast

Today
Sunny, with a high near 75. North wind 5 to 15 mph, with gusts as high as 25 mph.
Tonight
Increasing clouds, with a low around 56. North wind 5 to 10 mph.
Saturday
A 20 percent chance of showers after 3pm. Cloudy, with a high near 70. Northeast wind 5 to 10 mph, with gusts as high as 20 mph.
Saturday Night
Showers likely, mainly after midnight. Mostly cloudy, with a low around 53. North northeast wind 5 to 10 mph. Chance of precipitation is 60%.
Sunday
Showers likely, mainly before noon. Mostly cloudy, with a high near 64. Northeast wind 5 to 10 mph. Chance of precipitation is 70%.
Sunday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 50. Northeast wind around 5 mph becoming calm.
Monday
A chance of showers and thunderstorms. Mostly cloudy, with a high near 65. North wind around 5 mph becoming calm. Chance of precipitation is 50%.
Monday Night
A 20 percent chance of showers before midnight. Mostly cloudy, with a low around 49. Calm wind.
Tuesday
Partly sunny, with a high near 69. Calm wind.
Tuesday Night
Mostly cloudy, with a low around 52.
Veterans Day
A 20 percent chance of showers. Partly sunny, with a high near 74.
Wednesday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 53.
Thursday
Mostly sunny, with a high near 75.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SSW Manchaca TX
 30.09°N 97.92°W (Elev. 804 ft)
Last Update:
5:42 am CST Nov 6, 2026
Forecast Valid:
9am CST Nov 6, 2026-6pm CST Nov 12, 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