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

83°F

28°C

Humidity 79%
Wind Speed SW 12 mph
Barometer 30.05 in (1016.6 mb)
Dewpoint 76°F (24°C)
Visibility 10.00 mi
Heat Index91°F (33°C)
Last update 5 Jul 8:56 am CDT
Extended Forecast for

2 Miles WSW San Marcos TX

  • Today

    Today: Mostly sunny, with a high near 95. Heat index values as high as 101. South wind around 5 mph.

    High: 95 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 75. South southeast wind around 5 mph.

    Low: 75 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 95. Heat index values as high as 100. Southwest wind around 5 mph becoming south southeast in the afternoon.

    High: 95 °F

    Mostly Sunny

  • Monday Night

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

    Low: 75 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 95. South wind around 5 mph.

    High: 95 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 76. South southeast wind around 5 mph.

    Low: 76 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 96. South wind 5 to 10 mph.

    High: 96 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 75. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 75 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 97. South wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 97 °F

    Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 95. Heat index values as high as 101. South wind around 5 mph.
Tonight
Partly cloudy, with a low around 75. South southeast wind around 5 mph.
Monday
Mostly sunny, with a high near 95. Heat index values as high as 100. Southwest wind around 5 mph becoming south southeast in the afternoon.
Monday Night
Partly cloudy, with a low around 75. South southeast wind around 5 mph.
Tuesday
Mostly sunny, with a high near 95. South wind around 5 mph.
Tuesday Night
Mostly clear, with a low around 76. South southeast wind around 5 mph.
Wednesday
Sunny, with a high near 96. South wind 5 to 10 mph.
Wednesday Night
Mostly clear, with a low around 75. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Thursday
Sunny, with a high near 97. South wind 5 to 10 mph, with gusts as high as 20 mph.
Thursday Night
Mostly clear, with a low around 76.
Friday
Mostly sunny, with a high near 96.
Friday Night
Mostly clear, with a low around 76.
Saturday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 95.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles WSW San Marcos TX
 29.86°N 97.97°W (Elev. 646 ft)
Last Update:
6:44 am CDT Jul 5, 2026
Forecast Valid:
9am CDT Jul 5, 2026-6pm CDT Jul 11, 2026
 
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