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

43°F

6°C

Humidity 53%
Wind Speed N 12 mph
Barometer 30.54 in (1033.8 mb)
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Wind Chill37°F (3°C)
Last update 22 Feb 4:56 am CST
Extended Forecast for

5 Miles SW San Marcos TX

  • Today

    Today: Sunny, with a high near 63. North northeast wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 63 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 34. North northeast wind 5 to 10 mph.

    Low: 34 °F

    Mostly Clear

  • 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 38. East southeast wind around 5 mph becoming southwest after midnight.

    Low: 38 °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 30 mph.

    High: 74 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 54. South wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 54 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 85. South southwest wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 85 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 58. South wind around 10 mph.

    Low: 58 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 83. South southwest wind 10 to 15 mph becoming north northeast in the afternoon. Winds could gust as high as 20 mph.

    High: 83 °F

    Sunny

Detailed Forecast

Today
Sunny, with a high near 63. North northeast wind 10 to 15 mph, with gusts as high as 25 mph.
Tonight
Mostly clear, with a low around 34. 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 38. East southeast wind around 5 mph becoming southwest after midnight.
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 30 mph.
Tuesday Night
Mostly clear, with a low around 54. South wind 10 to 15 mph, with gusts as high as 25 mph.
Wednesday
Mostly sunny, with a high near 85. South southwest wind 10 to 15 mph, with gusts as high as 25 mph.
Wednesday Night
Mostly clear, with a low around 58. South wind around 10 mph.
Thursday
Sunny, with a high near 83. South southwest wind 10 to 15 mph becoming north northeast in the afternoon. Winds could gust as high as 20 mph.
Thursday Night
Clear, with a low around 50.
Friday
Sunny, with a high near 81.
Friday Night
Mostly clear, with a low around 55.
Saturday
Mostly sunny, with a high near 86.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles SW San Marcos TX
 29.81°N 97.99°W (Elev. 653 ft)
Last Update:
4:32 am CST Feb 22, 2026
Forecast Valid:
5am CST Feb 22, 2026-6pm CST Feb 28, 2026
 
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