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

64°F

18°C

Humidity 73%
Wind Speed NW 5 mph
Barometer 30.11 in (1019.3 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 6 Nov 7:56 pm CST
Extended Forecast for

3 Miles S Manchaca TX

  • Tonight

    Tonight: Mostly cloudy, with a low around 55. North wind 5 to 10 mph.

    Low: 55 °F

    Mostly Cloudy

  • Saturday

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

    High: 70 °F

    Cloudy then
    Slight Chance
    Showers

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms, then showers likely after 9pm. Mostly cloudy, with a low around 55. North northeast wind 5 to 10 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 55 °F

    Showers
    Likely

  • Sunday

    Sunday: Showers. High near 63. Northeast wind 5 to 10 mph. Chance of precipitation is 80%.

    High: 63 °F

    Showers

  • Sunday Night

    Sunday Night: Showers likely, mainly before midnight. Mostly cloudy, with a low around 52. Northeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 70%.

    Low: 52 °F

    Showers
    Likely

  • Monday

    Monday: Showers likely and possibly a thunderstorm before noon, then a chance of showers. Mostly cloudy, with a high near 64. North northeast wind around 5 mph becoming calm. Chance of precipitation is 70%.

    High: 64 °F

    Showers
    Likely then
    Chance
    Showers

  • Monday Night

    Monday Night: A 20 percent chance of showers. Mostly cloudy, with a low around 51. Calm wind.

    Low: 51 °F

    Slight Chance
    Showers

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 70. Calm wind.

    High: 70 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 53. Calm wind.

    Low: 53 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 55. 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.
Saturday Night
A chance of showers and thunderstorms, then showers likely after 9pm. Mostly cloudy, with a low around 55. North northeast wind 5 to 10 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday
Showers. High near 63. Northeast wind 5 to 10 mph. Chance of precipitation is 80%.
Sunday Night
Showers likely, mainly before midnight. Mostly cloudy, with a low around 52. Northeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 70%.
Monday
Showers likely and possibly a thunderstorm before noon, then a chance of showers. Mostly cloudy, with a high near 64. North northeast wind around 5 mph becoming calm. Chance of precipitation is 70%.
Monday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 51. Calm wind.
Tuesday
Mostly cloudy, with a high near 70. Calm wind.
Tuesday Night
Mostly cloudy, with a low around 53. Calm wind.
Veterans Day
A 20 percent chance of showers. Mostly cloudy, with a high near 75.
Wednesday Night
Mostly cloudy, with a low around 54.
Thursday
Mostly sunny, with a high near 73.
Thursday Night
Mostly clear, with a low around 48.
Friday
Sunny, with a high near 73.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles S Manchaca TX
 30.09°N 97.89°W (Elev. 801 ft)
Last Update:
5:48 pm CST Nov 6, 2026
Forecast Valid:
8pm CST Nov 6, 2026-6pm CST Nov 13, 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