National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Thunderstorm in Vicinity

76°F

24°C

Humidity 74%
Wind Speed SE 7 mph
Barometer 30.06 in (1017.0 mb)
Dewpoint 67°F (19°C)
Visibility 10.00 mi
Heat Index77°F (25°C)
Last update 28 May 10:56 pm CDT
Extended Forecast for

San Marcos TX

  • Tonight

    Tonight: A 50 percent chance of showers and thunderstorms. Some of the storms could be severe and produce heavy rainfall. Cloudy, with a low around 72. East northeast wind 5 to 10 mph. New rainfall amounts between a quarter and half of an inch possible.

    Low: 72 °F

    Severe
    Thunderstorms

  • Wednesday

    Wednesday: A 40 percent chance of showers and thunderstorms, mainly after 4pm. Partly sunny, with a high near 89. East northeast wind 5 to 10 mph.

    High: 89 °F

    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 72. South southeast wind 5 to 10 mph.

    Low: 72 °F

    Chance
    T-storms

  • Thursday

    Thursday: A 30 percent chance of showers and thunderstorms 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

    Mostly Cloudy
    then Chance
    T-storms

  • Thursday Night

    Thursday Night: A 40 percent chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 71. East southeast wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 71 °F

    Chance
    T-storms

  • Friday

    Friday: A 40 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 88. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 88 °F

    Chance
    T-storms

  • Friday Night

    Friday Night: A 40 percent chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 72. East southeast wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 72 °F

    Chance
    T-storms

  • Saturday

    Saturday: A 20 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 90. South southeast wind 5 to 10 mph.

    High: 90 °F

    Mostly Cloudy
    then Slight
    Chance
    T-storms

  • Saturday Night

    Saturday Night: A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 73. Southeast wind 5 to 10 mph.

    Low: 73 °F

    Slight Chance
    T-storms

Detailed Forecast

Tonight
A 50 percent chance of showers and thunderstorms. Some of the storms could be severe and produce heavy rainfall. Cloudy, with a low around 72. East northeast wind 5 to 10 mph. New rainfall amounts between a quarter and half of an inch possible.
Wednesday
A 40 percent chance of showers and thunderstorms, mainly after 4pm. Partly sunny, with a high near 89. East northeast wind 5 to 10 mph.
Wednesday Night
A 30 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 72. South southeast wind 5 to 10 mph.
Thursday
A 30 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 91. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Thursday Night
A 40 percent chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 71. East southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Friday
A 40 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 88. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Friday Night
A 40 percent chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 72. East southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Saturday
A 20 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 90. South southeast wind 5 to 10 mph.
Saturday Night
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 73. Southeast wind 5 to 10 mph.
Sunday
A 20 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 91.
Sunday Night
Mostly cloudy, with a low around 74.
Monday
Partly sunny, with a high near 93.
Monday Night
Mostly cloudy, with a low around 74.
Tuesday
Partly sunny, with a high near 95.
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ABOUT THIS FORECAST

 
Point Forecast:
San Marcos TX
 29.88°N 97.94°W (Elev. 577 ft)
Last Update:
11:32 pm CDT May 28, 2024
Forecast Valid:
11pm CDT May 28, 2024-6pm CDT Jun 4, 2024
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation