Severe Thunderstorms and Excessive Rainfall in the Central U.S.; Heat Building in the Western U.S.

A cold front pressing east across the central U.S. will be the focus for areas of strong to severe thunderstorms and excessive rainfall through this weekend. Strong to severe thunderstorms my bring damaging winds, hail, and a few tornadoes while excessive rainfall may lead to areas of flooding. Heat will build across the western U.S. with heat-related watches, warnings, and advisories issued. Read More >

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Fair

84°F

29°C

Humidity	77%
Wind Speed	SE 8 mph
Barometer	29.96 in (1013.8 mb)
Dewpoint	76°F (24°C)
Visibility	10.00 mi
Heat Index	93°F (34°C)
Last update	12 Jul 8:56 pm CDT

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Extended Forecast for

San Marcos Municipal Airport TX

Tonight
Low: 76 °F
Slight Chance
Showers then
Mostly Cloudy
Sunday
High: 93 °F
Heavy Rain
Sunday Night
Low: 74 °F
Heavy Rain
Monday
High: 94 °F
Mostly Sunny
Monday Night
Low: 75 °F
Partly Cloudy
Tuesday
High: 94 °F
Partly Sunny
Tuesday Night
Low: 74 °F
Partly Cloudy
Wednesday
High: 95 °F
Mostly Sunny
Wednesday Night
Low: 72 °F
Partly Cloudy

Detailed Forecast

Tonight

A 20 percent chance of showers before 10pm. Increasing clouds, with a low around 76. South southeast wind 5 to 10 mph.

Sunday

A 40 percent chance of showers and thunderstorms, mainly after 1pm. Some of the storms could produce heavy rainfall. Partly sunny, with a high near 93. Heat index values as high as 102. South wind 5 to 10 mph, with gusts as high as 20 mph.

Sunday Night

A 20 percent chance of showers and thunderstorms before 1am. Some of the storms could produce heavy rainfall. Mostly cloudy, with a low around 74. South southeast wind 5 to 10 mph.

Monday

Mostly sunny, with a high near 94. Heat index values as high as 101. Light south southeast wind becoming south 5 to 10 mph in the morning.

Monday Night

Partly cloudy, with a low around 75. Southeast wind 5 to 10 mph.

Tuesday

Partly sunny, with a high near 94. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.

Tuesday Night

Partly cloudy, with a low around 74. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.

Wednesday

Mostly sunny, with a high near 95. South wind 5 to 10 mph, with gusts as high as 20 mph.

Wednesday Night

Partly cloudy, with a low around 72. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.