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.

Fair

49°F

9°C

Humidity 25%
Wind Speed N 17 G 26 mph
Barometer 30.38 in (1028.6 mb)
Dewpoint 14°F (-10°C)
Visibility 10.00 mi
Wind Chill43°F (6°C)
Last update 16 Mar 10:56 am CDT
Extended Forecast for

2 Miles NNE San Marcos TX

Red Flag Warning March 16, 11:25am until March 16, 08:00pm
Click here for hazard details and duration
Red Flag Warning
  •  
    Red Flag Warning March 16, 11:25am until March 16, 08:00pm

    NOW until 8:00pm Mon

    Red Flag Warning

  • Today

    High: 57 °F

    Partly Sunny

  • Tonight

    Tonight: Cloudy during the early evening, then gradual clearing, with a low around 33. North northeast wind 5 to 10 mph becoming light and variable in the evening. Winds could gust as high as 20 mph.

    Low: 33 °F

    Gradual
    Clearing

  • Tuesday

    Tuesday: Sunny, with a high near 66. Light south wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 20 mph.

    High: 66 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 42. South wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 42 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 78. South wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 78 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 51. South wind around 5 mph.

    Low: 51 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 85. Southwest wind around 5 mph.

    High: 85 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 55. South wind around 5 mph.

    Low: 55 °F

    Clear

Detailed Forecast

Today
Partly sunny, with a high near 57. North wind 15 to 20 mph, with gusts as high as 30 mph.
Tonight
Cloudy during the early evening, then gradual clearing, with a low around 33. North northeast wind 5 to 10 mph becoming light and variable in the evening. Winds could gust as high as 20 mph.
Tuesday
Sunny, with a high near 66. Light south wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 20 mph.
Tuesday Night
Partly cloudy, with a low around 42. South wind 5 to 10 mph, with gusts as high as 20 mph.
Wednesday
Sunny, with a high near 78. South wind 5 to 10 mph, with gusts as high as 20 mph.
Wednesday Night
Mostly clear, with a low around 51. South wind around 5 mph.
Thursday
Sunny, with a high near 85. Southwest wind around 5 mph.
Thursday Night
Clear, with a low around 55. South wind around 5 mph.
Friday
Sunny, with a high near 91. Southwest wind 5 to 10 mph.
Friday Night
Clear, with a low around 58.
Saturday
Sunny, with a high near 94.
Saturday Night
Clear, with a low around 60.
Sunday
Sunny, with a high near 92.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles NNE San Marcos TX
 29.9°N 97.91°W (Elev. 640 ft)
Last Update:
8:44 am CDT Mar 16, 2026
Forecast Valid:
11am CDT Mar 16, 2026-6pm CDT Mar 22, 2026
 
Forecast Discussion
 
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