On July 7, 2015, NWS implemented changes to the icons depicted on all of its point-forecast pages. Changes include new icon images with increased clarity, 6-hour increments for rapidly changing weather and new color blocks to highlight forecast hazards.

A page depicting all of the new icon images can be accessed here: www.weather.gov/forecast-icons

Changes to the icons were based on analysis of 6,700 public comments collected in 2014. Also, many of these changes are based on the results of a research project led by the National Center for Atmospheric Research.

Users are encouraged to continue to provide comments regarding these changes via email at icons@noaa.gov. NWS will continue to analyze incoming feedback and refine the icons as necessary. Any substantial change to the icons will be facilitated through the NWS public comment/review process.

Dangerous heat continues across parts of the Pacific Northwest

Unusually hot weather will persist through Friday afternoon across parts of the Pacific Northwest, with high temperatures in the 90s to around 100 degrees in many locations. Heat Advisories and Excessive Heat Warnings are in effect across the region. Take extra precautions if you work or spend time outside, and know the signs and symptoms of heat exhaustion and heat stroke.
Read More...

Hazardous Weather Conditions

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Partly Cloudy

79°F

26°C

Humidity 84%
Wind Speed Calm
Barometer 30.04 in
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index83°F (28°C)
Last update 31 Jul 6:15 am CDT
Extended Forecast for

San Marcos TX

  • Today

    Today: A 30 percent chance of showers and thunderstorms after 7am.  Mostly sunny and hot, with a high near 98. Heat index values as high as 103. West northwest wind 5 to 10 mph becoming east northeast in the afternoon.

    Chance
    T-storms

    High: 98 °F

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms.  Partly cloudy, with a low around 75. East wind 5 to 10 mph becoming light and variable.

    Slight Chance
    T-storms

    Low: 75 °F

  • Saturday

    Saturday: A 20 percent chance of showers and thunderstorms.  Mostly sunny and hot, with a high near 100. East northeast wind 5 to 10 mph.

    Slight Chance
    T-storms

    High: 100 °F

  • Saturday
    Night

    Saturday Night: Partly cloudy, with a low around 74. East wind 5 to 10 mph becoming southwest after midnight.

    Partly Cloudy

    Low: 74 °F

  • Sunday

    Sunday: Mostly sunny and hot, with a high near 101. West southwest wind around 5 mph becoming east southeast in the afternoon.

    Hot

    High: 101 °F

  • Sunday
    Night

    Sunday Night: Partly cloudy, with a low around 75. Southeast wind 5 to 10 mph becoming south southwest after midnight.

    Partly Cloudy

    Low: 75 °F

  • Monday

    Monday: Mostly sunny and hot, with a high near 100. South southeast wind 5 to 10 mph.

    Hot

    High: 100 °F

  • Monday
    Night

    Monday Night: Partly cloudy, with a low around 75. South wind 5 to 10 mph.

    Partly Cloudy

    Low: 75 °F

  • Tuesday

    Tuesday: Mostly sunny and hot, with a high near 99. South wind 5 to 10 mph.

    Hot

    High: 99 °F

Detailed Forecast

Today
A 30 percent chance of showers and thunderstorms after 7am. Mostly sunny and hot, with a high near 98. Heat index values as high as 103. West northwest wind 5 to 10 mph becoming east northeast in the afternoon.
Tonight
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 75. East wind 5 to 10 mph becoming light and variable.
Saturday
A 20 percent chance of showers and thunderstorms. Mostly sunny and hot, with a high near 100. East northeast wind 5 to 10 mph.
Saturday Night
Partly cloudy, with a low around 74. East wind 5 to 10 mph becoming southwest after midnight.
Sunday
Mostly sunny and hot, with a high near 101. West southwest wind around 5 mph becoming east southeast in the afternoon.
Sunday Night
Partly cloudy, with a low around 75. Southeast wind 5 to 10 mph becoming south southwest after midnight.
Monday
Mostly sunny and hot, with a high near 100. South southeast wind 5 to 10 mph.
Monday Night
Partly cloudy, with a low around 75. South wind 5 to 10 mph.
Tuesday
Mostly sunny and hot, with a high near 99. South wind 5 to 10 mph.
Tuesday Night
Partly cloudy, with a low around 76.
Wednesday
Mostly sunny and hot, with a high near 99.
Wednesday Night
Partly cloudy, with a low around 76.
Thursday
Mostly sunny and hot, with a high near 99.
  Click Map For Forecast
Point Forecast:
San Marcos TX
 29.88°N 97.94°W (Elev. 577 ft)
6:00 am CDT Jul 31, 2015
6am CDT Jul 31, 2015-6pm CDT Aug 6, 2015
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Graph

National Digital Forecast Database