Heavy to Excessive Rainfall and Flooding Threats in the Central and Eastern U.S.; Heat and Fire Weather Concerns in the West

Thunderstorms producing excessive rainfall and potential flooding concerns will continue through tonight from the Southern Plains to the East Coast. Areas of greatest concern for flooding are over central Texas and the Mid-Atlantic. Heat will continue to build across the West through Tuesday. Heat Advisories and Extreme Heat Warnings are in effect. Fire Weather concerns continue through Monday. Read More >

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Partly Cloudy

74°F

23°C

Humidity	100%
Wind Speed	SE 3 mph
Barometer	30.05 in (1017.0 mb)
Dewpoint	74°F (23°C)
Visibility	10.00 mi
Last update	14 Jul 12:56 am CDT

More Information:

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

Extended Forecast for

San Marcos TX

Overnight
Low: 74 °F
Mostly Cloudy
Monday
High: 92 °F
Mostly Cloudy
then Chance
T-storms
Monday Night
Low: 74 °F
Mostly Cloudy
Tuesday
High: 93 °F
Decreasing
Clouds
Tuesday Night
Low: 74 °F
Partly Cloudy
Wednesday
High: 94 °F
Mostly Sunny
Wednesday Night
Low: 72 °F
Mostly Clear
Thursday
High: 94 °F
Mostly Sunny
Thursday Night
Low: 72 °F
Partly Cloudy

Detailed Forecast

Overnight

Mostly cloudy, with a low around 74. South wind around 5 mph.

Monday

A 30 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 92. Heat index values as high as 101. South wind 5 to 10 mph.

Monday Night

Mostly cloudy, with a low around 74. South southeast wind 5 to 10 mph.

Tuesday

Cloudy, then gradually becoming mostly sunny, with a high near 93. Heat index values as high as 101. 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.

Wednesday

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

Wednesday Night

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

Thursday

Mostly sunny, with a high near 94. South wind around 5 mph.

Thursday Night

Partly cloudy, with a low around 72. Southeast wind around 5 mph.

Friday

Mostly sunny, with a high near 94.