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.

Mostly Cloudy

89°F

32°C

Humidity 65%
Wind Speed SW 14 G 20 mph
Barometer 30.01 in (1015.7 mb)
Dewpoint 76°F (24°C)
Visibility 10.00 mi
Heat Index100°F (38°C)
Last update 16 Jun 12:56 pm CDT
Extended Forecast for

5 Miles WSW Martindale TX

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 93. Heat index values as high as 103. South wind around 10 mph, with gusts as high as 20 mph.

    High: 93 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 74. South wind around 10 mph.

    Low: 74 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 95. Heat index values as high as 104. South wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 95 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 75. South southeast wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 75 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 95. South wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 95 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 75. South southeast wind 10 to 15 mph decreasing to 5 to 10 mph after midnight. Winds could gust as high as 25 mph.

    Low: 75 °F

    Partly Cloudy

  • Juneteenth

    Juneteenth: A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 93. South southeast wind 5 to 10 mph.

    High: 93 °F

    Partly Sunny
    then Chance
    T-storms

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 73. South southeast wind 5 to 10 mph.

    Low: 73 °F

    Partly Cloudy

  • Friday

    Friday: A 30 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 91. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 91 °F

    Chance
    T-storms

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 93. Heat index values as high as 103. South wind around 10 mph, with gusts as high as 20 mph.
Tonight
Mostly clear, with a low around 74. South wind around 10 mph.
Tuesday
Sunny, with a high near 95. Heat index values as high as 104. South wind 10 to 15 mph, with gusts as high as 25 mph.
Tuesday Night
Mostly clear, with a low around 75. South southeast wind 10 to 15 mph, with gusts as high as 25 mph.
Wednesday
Sunny, with a high near 95. South wind 10 to 15 mph, with gusts as high as 25 mph.
Wednesday Night
Partly cloudy, with a low around 75. South southeast wind 10 to 15 mph decreasing to 5 to 10 mph after midnight. Winds could gust as high as 25 mph.
Juneteenth
A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 93. South southeast wind 5 to 10 mph.
Thursday Night
Partly cloudy, with a low around 73. South southeast wind 5 to 10 mph.
Friday
A 30 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 91. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Friday Night
Mostly cloudy, with a low around 73.
Saturday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 91.
Saturday Night
Partly cloudy, with a low around 72.
Sunday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 89.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles WSW Martindale TX
 29.81°N 97.91°W (Elev. 581 ft)
Last Update:
12:44 pm CDT Jun 16, 2025
Forecast Valid:
1pm CDT Jun 16, 2025-6pm CDT Jun 22, 2025
 
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Additional Resources

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Chance of Precipitation