Widespread Showers in the Eastern US; Severe Thunderstorms in the Plains; Heatwave in the Desert Southwest

Widespread showers and thunderstorms across much of the central and eastern U.S. will produce areas of excessive rainfall, especially in the southern Mid-Atlantic states. Scattered severe thunderstorms are expected from Montana into portions of the central/southern Plains this weekend. A heatwave will build in the Desert Southwest, in parts of Arizona, southeastern California, and southern Nevada. Read More >

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

A Few Clouds

92°F

33°C

Humidity	58%
Wind Speed	SW 12 mph
Barometer	29.90 in (1011.5 mb)
Dewpoint	75°F (24°C)
Visibility	10.00 mi
Heat Index	103°F (39°C)
Last update	13 Jun 3:56 pm CDT

More Information:

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

Extended Forecast for

3 Miles WNW San Marcos TX

This Afternoon
High: 91 °F
Slight Chance
T-storms
Tonight
Low: 75 °F
Slight Chance
T-storms then
Mostly Cloudy
Saturday
High: 93 °F
Partly Sunny
then Chance
T-storms
Saturday Night
Low: 74 °F
Increasing
Clouds
Sunday
High: 93 °F
Partly Sunny
then Slight
Chance
T-storms
Sunday Night
Low: 74 °F
Partly Cloudy
Monday
High: 93 °F
Mostly Sunny
Monday Night
Low: 74 °F
Mostly Clear
Tuesday
High: 95 °F
Mostly Sunny

Detailed Forecast

This Afternoon

A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 91. Heat index values as high as 103. South wind around 10 mph, with gusts as high as 20 mph.

Tonight

A 10 percent chance of showers and thunderstorms before 7pm. Increasing clouds, with a low around 75. South southeast wind around 5 mph.

Saturday

A 30 percent chance of showers and thunderstorms after 1pm. Mostly cloudy, then gradually becoming sunny, with a high near 93. Heat index values as high as 105. South wind 5 to 10 mph.

Saturday Night

Increasing clouds, with a low around 74. South wind 5 to 10 mph.

Sunday

A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 93. South wind around 5 mph.

Sunday Night

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

Monday

Mostly sunny, with a high near 93. South wind 5 to 10 mph.

Monday Night

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

Tuesday

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