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

87°F

31°C

Humidity 65%
Wind Speed SE 20 G 25 mph
Barometer 29.78 in (1007.6 mb)
Dewpoint 74°F (23°C)
Visibility 10.00 mi
Heat Index95°F (35°C)
Last update 17 Jun 7:56 pm CDT
Extended Forecast for

San Marcos TX

  • Tonight

    Tonight: A 20 percent chance of showers after 4am. Mostly cloudy, with a low around 75. Southeast wind 10 to 15 mph, with gusts as high as 30 mph.

    Low: 75 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

  • Tuesday

    Tuesday: A slight chance of showers before 10am, then a slight chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 91. Southeast wind 5 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.

    High: 91 °F

    Slight Chance
    Showers then
    Slight Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A slight chance of showers between 1am and 4am, then a slight chance of showers and thunderstorms after 4am. Increasing clouds, with a low around 74. East wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.

    Low: 74 °F

    Mostly Cloudy
    then Slight
    Chance
    T-storms

  • Juneteenth

    Juneteenth: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Some of the storms could produce heavy rainfall. Cloudy, with a high near 78. Northeast wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 70%.

    High: 78 °F

    Heavy Rain

  • Wednesday Night

    Wednesday Night: Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Some of the storms could produce heavy rainfall. Cloudy, with a low around 73. East northeast wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 60%.

    Low: 73 °F

    Heavy Rain

  • Thursday

    Thursday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 82. East northeast wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 60%.

    High: 82 °F

    Chance
    T-storms then
    Showers
    Likely

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 73. East wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 73 °F

    Mostly Cloudy

  • Friday

    Friday: A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 87. East wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 87 °F

    Slight Chance
    T-storms

  • Friday Night

    Friday Night: Partly cloudy, with a low around 72. East southeast wind 5 to 10 mph.

    Low: 72 °F

    Partly Cloudy

Detailed Forecast

Tonight
A 20 percent chance of showers after 4am. Mostly cloudy, with a low around 75. Southeast wind 10 to 15 mph, with gusts as high as 30 mph.
Tuesday
A slight chance of showers before 10am, then a slight chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 91. Southeast wind 5 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.
Tuesday Night
A slight chance of showers between 1am and 4am, then a slight chance of showers and thunderstorms after 4am. Increasing clouds, with a low around 74. East wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.
Juneteenth
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Some of the storms could produce heavy rainfall. Cloudy, with a high near 78. Northeast wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 70%.
Wednesday Night
Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Some of the storms could produce heavy rainfall. Cloudy, with a low around 73. East northeast wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 60%.
Thursday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 82. East northeast wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 60%.
Thursday Night
Mostly cloudy, with a low around 73. East wind 5 to 10 mph, with gusts as high as 20 mph.
Friday
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 87. East wind 5 to 10 mph, with gusts as high as 20 mph.
Friday Night
Partly cloudy, with a low around 72. East southeast wind 5 to 10 mph.
Saturday
Mostly sunny, with a high near 89.
Saturday Night
Mostly clear, with a low around 73.
Sunday
Mostly sunny, with a high near 91.
Sunday Night
Partly cloudy, with a low around 74.
Monday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 92.
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ABOUT THIS FORECAST

 
Point Forecast:
San Marcos TX
 29.88°N 97.94°W (Elev. 577 ft)
Last Update:
7:42 pm CDT Jun 17, 2024
Forecast Valid:
8pm CDT Jun 17, 2024-6pm CDT Jun 24, 2024
 
Forecast Discussion
 
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Additional Resources

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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