National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Overcast

71°F

22°C

Humidity 28%
Wind Speed N 20 mph
Barometer 30.14 in (1020.2 mb)
Dewpoint 36°F (2°C)
Visibility 10.00 mi
Last update 21 Feb 3:56 pm CST
Extended Forecast for

2 Miles SW San Marcos Municipal Airport TX

Red Flag Warning until February 21, 09:00pm
Click here for hazard details and duration
Red Flag Warning
  •  
    Red Flag Warning until February 21, 09:00pm

    NOW until 9:00pm Sat

    Red Flag Warning

  • This Afternoon

    High: 69 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 39. North wind 15 to 20 mph, with gusts as high as 30 mph.

    Low: 39 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 64. North northeast wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 64 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 35. North northeast wind 5 to 10 mph.

    Low: 35 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 65. North northeast wind around 5 mph becoming east southeast in the afternoon.

    High: 65 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 37. East southeast wind around 5 mph becoming calm.

    Low: 37 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 74. South southwest wind 5 to 10 mph increasing to 10 to 15 mph in the afternoon. Winds could gust as high as 25 mph.

    High: 74 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 53. South wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 53 °F

    Partly Cloudy

Detailed Forecast

This Afternoon
Mostly sunny, with a steady temperature around 69. North wind around 20 mph, with gusts as high as 30 mph.
Tonight
Mostly clear, with a low around 39. North wind 15 to 20 mph, with gusts as high as 30 mph.
Sunday
Sunny, with a high near 64. North northeast wind 10 to 15 mph, with gusts as high as 25 mph.
Sunday Night
Partly cloudy, with a low around 35. North northeast wind 5 to 10 mph.
Monday
Sunny, with a high near 65. North northeast wind around 5 mph becoming east southeast in the afternoon.
Monday Night
Mostly clear, with a low around 37. East southeast wind around 5 mph becoming calm.
Tuesday
Sunny, with a high near 74. South southwest wind 5 to 10 mph increasing to 10 to 15 mph in the afternoon. Winds could gust as high as 25 mph.
Tuesday Night
Partly cloudy, with a low around 53. South wind 10 to 15 mph, with gusts as high as 20 mph.
Wednesday
Mostly sunny, with a high near 85. South southwest wind 10 to 15 mph, with gusts as high as 30 mph.
Wednesday Night
Partly cloudy, with a low around 57.
Thursday
Sunny, with a high near 85.
Thursday Night
Mostly clear, with a low around 49.
Friday
Sunny, with a high near 80.
Friday Night
Mostly clear, with a low around 51.
Saturday
Sunny, with a high near 85.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SW San Marcos Municipal Airport TX
 29.88°N 97.89°W (Elev. 597 ft)
Last Update:
4:32 pm CST Feb 21, 2026
Forecast Valid:
4pm CST Feb 21, 2026-6pm CST Feb 28, 2026
 
Forecast Discussion
 
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Additional Resources

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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