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.

Overcast

65°F

18°C

Humidity 90%
Wind Speed S 5 mph
Barometer 30.03 in (1016.1 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Last update 2 Mar 3:56 am CST
Extended Forecast for

3 Miles NNW Luling TX

  • Today

    Today: Mostly cloudy, then gradually becoming sunny, with a high near 83. South southeast wind 5 to 10 mph.

    High: 83 °F

    Decreasing
    Clouds

  • Tonight

    Tonight: Increasing clouds, with a low around 62. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 62 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: Mostly sunny, with a high near 87. South wind 5 to 15 mph, with gusts as high as 25 mph.

    High: 87 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Increasing clouds, with a low around 65. South southeast wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 65 °F

    Increasing
    Clouds

  • Wednesday

    Wednesday: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 86. South southeast wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 86 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers and thunderstorms, mainly before midnight. Mostly cloudy, with a low around 66. South southeast wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 66 °F

    Chance
    Showers then
    Slight Chance
    T-storms

  • Thursday

    Thursday: Partly sunny, with a high near 87. South southeast wind 10 to 15 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 25 mph.

    High: 87 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 67. South southeast wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 67 °F

    Mostly Cloudy

  • Friday

    Friday: A 40 percent chance of showers and thunderstorms, mainly after noon. Partly sunny, with a high near 86. South wind 10 to 20 mph, with gusts as high as 30 mph.

    High: 86 °F

    Slight Chance
    T-storms then
    Chance
    Showers

Detailed Forecast

Today
Mostly cloudy, then gradually becoming sunny, with a high near 83. South southeast wind 5 to 10 mph.
Tonight
Increasing clouds, with a low around 62. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Tuesday
Mostly sunny, with a high near 87. South wind 5 to 15 mph, with gusts as high as 25 mph.
Tuesday Night
Increasing clouds, with a low around 65. South southeast wind 10 to 15 mph, with gusts as high as 25 mph.
Wednesday
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 86. South southeast wind 10 to 15 mph, with gusts as high as 25 mph.
Wednesday Night
A 30 percent chance of showers and thunderstorms, mainly before midnight. Mostly cloudy, with a low around 66. South southeast wind 10 to 15 mph, with gusts as high as 20 mph.
Thursday
Partly sunny, with a high near 87. South southeast wind 10 to 15 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 25 mph.
Thursday Night
Mostly cloudy, with a low around 67. South southeast wind 10 to 15 mph, with gusts as high as 25 mph.
Friday
A 40 percent chance of showers and thunderstorms, mainly after noon. Partly sunny, with a high near 86. South wind 10 to 20 mph, with gusts as high as 30 mph.
Friday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 65. Chance of precipitation is 60%.
Saturday
Showers and possibly a thunderstorm. High near 83. Chance of precipitation is 80%.
Saturday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 60. Chance of precipitation is 70%.
Sunday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 75. Chance of precipitation is 70%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NNW Luling TX
 29.73°N 97.65°W (Elev. 446 ft)
Last Update:
3:45 am CST Mar 2, 2026
Forecast Valid:
4am CST Mar 2, 2026-6pm CDT Mar 8, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation