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Hazardous Weather Conditions

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Mostly Cloudy

56°F

13°C

Humidity 90%
Wind Speed Calm
Barometer 29.97 in (1014.1 mb)
Dewpoint 53°F (12°C)
Visibility 10.00 mi
Last update 14 Mar 2:56 am CDT
Extended Forecast for

San Marcos TX

Fire Weather Watch March 15, 12:00pm until March 16, 08:00pm
Click here for hazard details and duration
Fire Weather Watch

  • Overnight

    Overnight: Partly cloudy, with a low around 52. South southwest wind around 5 mph.

    Low: 52 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, then gradually becoming sunny, with a high near 84. South wind 5 to 15 mph, with gusts as high as 20 mph.

    High: 84 °F

    Becoming
    Sunny

  • Saturday Night

    Saturday Night: Increasing clouds, with a low around 64. South southeast wind around 15 mph, with gusts as high as 25 mph.

    Low: 64 °F

    Increasing
    Clouds

  • Sunday

    Sunday: Cloudy through mid morning, then gradual clearing, with a high near 92. South wind 10 to 15 mph becoming west northwest in the afternoon. Winds could gust as high as 25 mph.

    High: 92 °F

    Gradual
    Clearing

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 39. Breezy, with a north wind around 25 mph, with gusts as high as 45 mph.

    Low: 39 °F

    Mostly Clear
    and Breezy

  • Monday

    Monday: Mostly sunny, with a high near 56. North wind 10 to 20 mph, with gusts as high as 35 mph.

    High: 56 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 35. North northeast wind 5 to 10 mph becoming light and variable in the evening.

    Low: 35 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 67. South wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 67 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 45. South wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 45 °F

    Mostly Clear

Detailed Forecast

Overnight
Partly cloudy, with a low around 52. South southwest wind around 5 mph.
Saturday
Partly sunny, then gradually becoming sunny, with a high near 84. South wind 5 to 15 mph, with gusts as high as 20 mph.
Saturday Night
Increasing clouds, with a low around 64. South southeast wind around 15 mph, with gusts as high as 25 mph.
Sunday
Cloudy through mid morning, then gradual clearing, with a high near 92. South wind 10 to 15 mph becoming west northwest in the afternoon. Winds could gust as high as 25 mph.
Sunday Night
Mostly clear, with a low around 39. Breezy, with a north wind around 25 mph, with gusts as high as 45 mph.
Monday
Mostly sunny, with a high near 56. North wind 10 to 20 mph, with gusts as high as 35 mph.
Monday Night
Mostly cloudy, with a low around 35. North northeast wind 5 to 10 mph becoming light and variable in the evening.
Tuesday
Mostly sunny, with a high near 67. South wind 5 to 10 mph, with gusts as high as 20 mph.
Tuesday Night
Mostly clear, with a low around 45. South wind 5 to 10 mph, with gusts as high as 20 mph.
Wednesday
Sunny, with a high near 78.
Wednesday Night
Mostly clear, with a low around 52.
Thursday
Sunny, with a high near 84.
Thursday Night
Clear, with a low around 56.
Friday
Sunny, with a high near 89.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
San Marcos TX
 29.88°N 97.94°W (Elev. 577 ft)
Last Update:
2:44 am CDT Mar 14, 2026
Forecast Valid:
3am CDT Mar 14, 2026-6pm CDT Mar 20, 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