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.

Fair

91°F

33°C

Humidity 59%
Wind Speed E 10 mph
Barometer 29.66 in (1003.4 mb)
Dewpoint 75°F (24°C)
Visibility 9.00 mi
Heat Index102°F (39°C)
Last update 9 May 5:56 pm CDT
Extended Forecast for

San Marcos TX

Severe T-storm Watch until May 10, 12:00am
Click here for hazard details and duration
Severe T-storm Watch
  •  
    Severe T-storm Watch until May 10, 12:00am

    NOW until 12:00am Fri

    Severe T-storm Watch

  • Tonight

    Low: 70 °F

    Severe
    Thunderstorms
    then Mostly
    Cloudy

  • Friday

    Friday: Partly sunny, with a high near 83. Northeast wind around 15 mph, with gusts as high as 20 mph.

    High: 83 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 66. North northeast wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 66 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly cloudy, with a high near 81. North northeast wind around 10 mph becoming east in the afternoon. Winds could gust as high as 20 mph.

    High: 81 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: A 40 percent chance of showers and thunderstorms after 1am. Cloudy, with a low around 65. East wind 5 to 10 mph.

    Low: 65 °F

    Mostly Cloudy
    then Chance
    T-storms

  • Sunday

    Sunday: Showers and thunderstorms likely, mainly after 1pm. Cloudy, with a high near 76. East southeast wind 5 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.

    High: 76 °F

    T-storms
    Likely

  • Sunday Night

    Sunday Night: A 30 percent chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 68. East southeast wind around 10 mph, with gusts as high as 20 mph.

    Low: 68 °F

    Chance
    T-storms

  • Monday

    Monday: A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 86. South wind around 10 mph, with gusts as high as 20 mph.

    High: 86 °F

    Chance
    T-storms

Detailed Forecast

Tonight
A slight chance of showers and thunderstorms between 7pm and 10pm. Some of the storms could be severe. Widespread haze before 7pm. Increasing clouds, with a low around 70. East wind 5 to 10 mph becoming north after midnight. Chance of precipitation is 20%.
Friday
Partly sunny, with a high near 83. Northeast wind around 15 mph, with gusts as high as 20 mph.
Friday Night
Mostly cloudy, with a low around 66. North northeast wind 10 to 15 mph, with gusts as high as 20 mph.
Saturday
Mostly cloudy, with a high near 81. North northeast wind around 10 mph becoming east in the afternoon. Winds could gust as high as 20 mph.
Saturday Night
A 40 percent chance of showers and thunderstorms after 1am. Cloudy, with a low around 65. East wind 5 to 10 mph.
Sunday
Showers and thunderstorms likely, mainly after 1pm. Cloudy, with a high near 76. East southeast wind 5 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.
Sunday Night
A 30 percent chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 68. East southeast wind around 10 mph, with gusts as high as 20 mph.
Monday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 86. South wind around 10 mph, with gusts as high as 20 mph.
Monday Night
Mostly clear, with a low around 64. South wind 5 to 10 mph becoming north after midnight.
Tuesday
Mostly sunny, with a high near 90.
Tuesday Night
Partly cloudy, with a low around 67.
Wednesday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 89.
Wednesday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 67.
Thursday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 86.
Click Map For Forecast
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Map Legend

ABOUT THIS FORECAST

 
Point Forecast:
San Marcos TX
 29.9°N 97.91°W (Elev. 640 ft)
Last Update:
5:48 pm CDT May 9, 2024
Forecast Valid:
6pm CDT May 9, 2024-6pm CDT May 16, 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