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

84°F

29°C

Humidity 24%
Wind Speed N 13 G 18 mph
Barometer 30.01 in (1015.8 mb)
Dewpoint 43°F (6°C)
Visibility 10.00 mi
Heat Index82°F (28°C)
Last update 11 May 2:56 pm CDT
Extended Forecast for

San Marcos TX

  • This Afternoon

    This Afternoon: Sunny, with a high near 84. North northwest wind around 10 mph, with gusts as high as 20 mph.

    High: 84 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 56. North wind 5 to 10 mph becoming light in the evening.

    Low: 56 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 91. Calm wind becoming northwest around 5 mph in the afternoon.

    High: 91 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 62. Southwest wind around 5 mph becoming south southeast in the evening.

    Low: 62 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny and hot, with a high near 102. South southwest wind 5 to 15 mph, with gusts as high as 25 mph.

    High: 102 °F

    Hot

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 70. South wind around 10 mph, with gusts as high as 20 mph.

    Low: 70 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny and hot, with a high near 103. South southwest wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 103 °F

    Hot

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 71. South wind around 10 mph, with gusts as high as 20 mph.

    Low: 71 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny and hot, with a high near 101. South wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 101 °F

    Hot

Detailed Forecast

This Afternoon
Sunny, with a high near 84. North northwest wind around 10 mph, with gusts as high as 20 mph.
Tonight
Clear, with a low around 56. North wind 5 to 10 mph becoming light in the evening.
Monday
Sunny, with a high near 91. Calm wind becoming northwest around 5 mph in the afternoon.
Monday Night
Mostly clear, with a low around 62. Southwest wind around 5 mph becoming south southeast in the evening.
Tuesday
Sunny and hot, with a high near 102. South southwest wind 5 to 15 mph, with gusts as high as 25 mph.
Tuesday Night
Partly cloudy, with a low around 70. South wind around 10 mph, with gusts as high as 20 mph.
Wednesday
Mostly sunny and hot, with a high near 103. South southwest wind 5 to 10 mph, with gusts as high as 20 mph.
Wednesday Night
Partly cloudy, with a low around 71. South wind around 10 mph, with gusts as high as 20 mph.
Thursday
Mostly sunny and hot, with a high near 101. South wind 5 to 10 mph, with gusts as high as 20 mph.
Thursday Night
Mostly cloudy, with a low around 73.
Friday
Partly sunny and hot, with a high near 99.
Friday Night
Mostly cloudy, with a low around 74.
Saturday
Mostly sunny and hot, with a high near 100.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
San Marcos TX
 29.88°N 97.94°W (Elev. 577 ft)
Last Update:
2:42 pm CDT May 11, 2025
Forecast Valid:
3pm CDT May 11, 2025-6pm CDT May 17, 2025
 
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Additional Resources

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