Heavy Rain From the Central Plains to the Mid-Atlantic; Heat Wave Begins This Weekend

Strong to severe thunderstorms and heavy rain will impact portions of the central Plains into the Upper Midwest and the Mid-Atlantic through the weekend. A stretch of unusually hot and humid weather is expected across portions of the central U.S. and the Southeast beginning this weekend and continuing through next week. The heat may reach dangerous levels, particularly mid to late next week. Read More >

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89° N Lon: 97.86° W Elev: 597 ft.

Fair

82°F

28°C

Humidity 74%
Wind Speed SE 8 mph
Barometer 30.07 in (1017.2 mb)
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index87°F (31°C)
Last update 18 Jul 10:56 pm CDT
Detailed forecast for

Caldwell County

Tonight
Partly cloudy this evening, then becoming mostly cloudy. Lows in the mid 70s. South winds 5 to 10 mph.
Saturday
Mostly cloudy in the morning, then becoming partly cloudy. Highs in the mid 90s. South winds 5 to 10 mph.
Saturday Night
Partly cloudy. Lows in the mid 70s. South winds 5 to 10 mph with gusts up to 20 mph.
Sunday
Partly cloudy. Highs in the mid 90s. South winds 10 to 15 mph.
Sunday Night
Partly cloudy in the evening, then becoming mostly cloudy. Lows in the mid 70s. South winds 10 to 15 mph.
Monday Through Wednesday
Partly cloudy. Highs in the upper 90s. Lows in the mid 70s.
Wednesday Night
Mostly clear in the evening, then becoming partly cloudy. Lows in the mid 70s.
Thursday Through Friday
Partly cloudy. Highs in the upper 90s. Lows in the mid 70s.



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126 PM CDT Fri Jul 18 2025
 
 

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database