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

89°F

32°C

Humidity 63%
Wind Speed S 10 mph
Barometer 30.11 in (1018.8 mb)
Dewpoint 75°F (24°C)
Visibility 10.00 mi
Heat Index99°F (37°C)
Last update 7 Jul 10:56 am CDT
Extended Forecast for

2 Miles WSW San Marcos TX

  • Today

    Today: A 20 percent chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 95. South wind around 5 mph.

    High: 95 °F

    Slight Chance
    T-storms

  • Tonight

    Tonight: A slight chance of showers and thunderstorms before 7pm, then a slight chance of showers between 7pm and 10pm. Partly cloudy, with a low around 74. South wind around 5 mph. Chance of precipitation is 20%.

    Low: 74 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 96. Heat index values as high as 100. South wind 5 to 10 mph.

    High: 96 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 73. South wind 5 to 10 mph.

    Low: 73 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 96. South wind 5 to 15 mph, with gusts as high as 20 mph.

    High: 96 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 75. South southeast wind 5 to 15 mph, with gusts as high as 25 mph.

    Low: 75 °F

    Mostly Clear

  • Friday

    Friday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 94. South wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 94 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Friday Night

    Friday Night: Partly cloudy, with a low around 76. South southeast wind 5 to 15 mph, with gusts as high as 20 mph.

    Low: 76 °F

    Partly Cloudy

  • Saturday

    Saturday: A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 93. South southeast wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 40%.

    High: 93 °F

    Chance
    Showers then
    Chance
    T-storms

Detailed Forecast

Today
A 20 percent chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 95. South wind around 5 mph.
Tonight
A slight chance of showers and thunderstorms before 7pm, then a slight chance of showers between 7pm and 10pm. Partly cloudy, with a low around 74. South wind around 5 mph. Chance of precipitation is 20%.
Wednesday
Mostly sunny, with a high near 96. Heat index values as high as 100. South wind 5 to 10 mph.
Wednesday Night
Mostly clear, with a low around 73. South wind 5 to 10 mph.
Thursday
Sunny, with a high near 96. South wind 5 to 15 mph, with gusts as high as 20 mph.
Thursday Night
Mostly clear, with a low around 75. South southeast wind 5 to 15 mph, with gusts as high as 25 mph.
Friday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 94. South wind 5 to 10 mph, with gusts as high as 20 mph.
Friday Night
Partly cloudy, with a low around 76. South southeast wind 5 to 15 mph, with gusts as high as 20 mph.
Saturday
A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 93. South southeast wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 40%.
Saturday Night
A 20 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 76.
Sunday
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 93.
Sunday Night
Partly cloudy, with a low around 76.
Monday
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 94.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles WSW San Marcos TX
 29.86°N 97.97°W (Elev. 646 ft)
Last Update:
10:50 am CDT Jul 7, 2026
Forecast Valid:
11am CDT Jul 7, 2026-6pm CDT Jul 13, 2026
 
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Additional Resources

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Chance of Precipitation