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

A Large and Slow-Moving Storm System Producing Thunderstorms and Heavy Rain

A slow-moving and large storm system will produce widespread strong to severe thunderstorms and heavy rainfall with possible flooding from the Midwest and Ohio Valley to the Southern U.S. into late week. Record-breaking heat is possible in central California. Read More >

Hazardous Weather Conditions

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Fair

73°F

23°C

Humidity 62%
Wind Speed NW 15 G 21 mph
Barometer 29.89 in (1011.1 mb)
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 25 May 10:56 am CDT
Extended Forecast for

San Marcos TX

  • Today

    Today: Mostly sunny, with a high near 78. North northwest wind 10 to 15 mph, with gusts as high as 25 mph.

    Mostly Sunny

    High: 78 °F

  • Tonight

    Tonight: Mostly clear, with a low around 58. North northwest wind 5 to 10 mph becoming west after midnight.

    Mostly Clear

    Low: 58 °F

  • Thursday

    Thursday: Sunny, with a high near 89. West southwest wind 5 to 10 mph, with gusts as high as 20 mph.

    Sunny

    High: 89 °F

  • Thursday
    Night

    Thursday Night: Mostly clear, with a low around 64. South southeast wind around 5 mph.

    Mostly Clear

    Low: 64 °F

  • Friday

    Friday: Sunny, with a high near 92. Southwest wind 5 to 10 mph becoming south southeast in the afternoon. Winds could gust as high as 20 mph.

    Sunny

    High: 92 °F

  • Friday
    Night

    Friday Night: Mostly clear, with a low around 66. Southeast wind around 10 mph.

    Mostly Clear

    Low: 66 °F

  • Saturday

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

    Sunny

    High: 95 °F

  • Saturday
    Night

    Saturday Night: Mostly clear, with a low around 71. South wind around 15 mph, with gusts as high as 20 mph.

    Mostly Clear

    Low: 71 °F

  • Sunday

    Sunday: Sunny, with a high near 94. South wind 10 to 20 mph, with gusts as high as 25 mph.

    Sunny

    High: 94 °F

Detailed Forecast

Today
Mostly sunny, with a high near 78. North northwest wind 10 to 15 mph, with gusts as high as 25 mph.
Tonight
Mostly clear, with a low around 58. North northwest wind 5 to 10 mph becoming west after midnight.
Thursday
Sunny, with a high near 89. West southwest wind 5 to 10 mph, with gusts as high as 20 mph.
Thursday Night
Mostly clear, with a low around 64. South southeast wind around 5 mph.
Friday
Sunny, with a high near 92. Southwest wind 5 to 10 mph becoming south southeast in the afternoon. Winds could gust as high as 20 mph.
Friday Night
Mostly clear, with a low around 66. Southeast wind around 10 mph.
Saturday
Sunny, with a high near 95. South wind 10 to 15 mph, with gusts as high as 25 mph.
Saturday Night
Mostly clear, with a low around 71. South wind around 15 mph, with gusts as high as 20 mph.
Sunday
Sunny, with a high near 94. South wind 10 to 20 mph, with gusts as high as 25 mph.
Sunday Night
Partly cloudy, with a low around 73.
Memorial Day
Mostly sunny, with a high near 94.
Monday Night
Partly cloudy, with a low around 72.
Tuesday
Partly sunny, with a high near 90.
Click Map For Forecast
Disclaimer
Map Legend
Point Forecast:
San Marcos TX
 29.88°N 97.94°W (Elev. 577 ft)
Last Update:
6:38 am CDT May 25, 2022
Forecast Valid:
11am CDT May 25, 2022-6pm CDT May 31, 2022
 
Forecast Discussion
 
Get as KML Get as XML

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