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.

Fair

97°F

36°C

Humidity 37%
Wind Speed Vrbl 7 mph
Barometer 30.07 in (1017.3 mb)
Dewpoint 67°F (19°C)
Visibility 10.00 mi
Heat Index101°F (38°C)
Last update 18 Sep 2:56 pm CDT
Extended Forecast for

Niederwald TX

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 97. Heat index values as high as 101. East southeast wind around 10 mph.

    High: 97 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 72. East southeast wind 5 to 10 mph becoming light and variable after midnight.

    Low: 72 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 97. Heat index values as high as 101. Calm wind becoming southeast around 5 mph in the afternoon.

    High: 97 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 73. Southeast wind 5 to 10 mph.

    Low: 73 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 98. South wind around 5 mph.

    High: 98 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 74. Southeast wind 5 to 10 mph.

    Low: 74 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 98. South southwest wind around 5 mph becoming calm.

    High: 98 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 74. East southeast wind around 5 mph becoming calm in the evening.

    Low: 74 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 98. Calm wind becoming east around 5 mph in the afternoon.

    High: 98 °F

    Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 97. Heat index values as high as 101. East southeast wind around 10 mph.
Tonight
Partly cloudy, with a low around 72. East southeast wind 5 to 10 mph becoming light and variable after midnight.
Saturday
Sunny, with a high near 97. Heat index values as high as 101. Calm wind becoming southeast around 5 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 73. Southeast wind 5 to 10 mph.
Sunday
Mostly sunny, with a high near 98. South wind around 5 mph.
Sunday Night
Partly cloudy, with a low around 74. Southeast wind 5 to 10 mph.
Monday
Mostly sunny, with a high near 98. South southwest wind around 5 mph becoming calm.
Monday Night
Mostly clear, with a low around 74. East southeast wind around 5 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 98. Calm wind becoming east around 5 mph in the afternoon.
Tuesday Night
Partly cloudy, with a low around 75.
Wednesday
Mostly sunny, with a high near 98.
Wednesday Night
Partly cloudy, with a low around 75.
Thursday
Mostly sunny, with a high near 97.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Niederwald TX
 30.02°N 97.73°W (Elev. 614 ft)
Last Update:
2:44 pm CDT Sep 18, 2026
Forecast Valid:
3pm CDT Sep 18, 2026-6pm CDT Sep 24, 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