Areas of Heavy to Excessive Rainfall Which May Bring Flooding

Monsoon moisture will continue to produce areas of heavy to excessive rainfall and potential flooding across the northern Intermountain West today. Debris flows will be possible over recent wildfire burn areas. Heavy to excessive rainfall and flash flooding will be possible across the central Rockies into the south-central Plains and lower Mississippi Valley through Thursday. Read More >

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Partly Cloudy

94°F

34°C

Humidity	44%
Wind Speed	S 13 mph
Barometer	30.04 in (1016.3 mb)
Dewpoint	69°F (21°C)
Visibility	10.00 mi
Heat Index	99°F (37°C)
Last update	27 Aug 4:56 pm CDT

More Information:

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

Extended Forecast for

4 Miles SSW San Marcos TX

This Afternoon
High: 93 °F
Chance
T-storms
Tonight
Low: 74 °F
Chance
T-storms then
Mostly Clear
Thursday
High: 97 °F
Becoming
Sunny
Thursday Night
Low: 75 °F
Mostly Clear
Friday
High: 99 °F
Sunny then
Slight Chance
T-storms
Friday Night
Low: 75 °F
Slight Chance
Showers
Saturday
High: 95 °F
Mostly Sunny
then Chance
T-storms
Saturday Night
Low: 74 °F
Chance
T-storms
Sunday
High: 90 °F
Chance
Showers then
Chance
T-storms

Detailed Forecast

This Afternoon

A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 93. Heat index values as high as 100. East southeast wind around 5 mph.

Tonight

A 30 percent chance of showers and thunderstorms before 7pm. Mostly clear, with a low around 74. South southeast wind around 5 mph.

Thursday

Partly sunny, then gradually becoming sunny, with a high near 97. Heat index values as high as 105. South southwest wind 5 to 10 mph.

Thursday Night

Mostly clear, with a low around 75. South wind 5 to 10 mph.

Friday

A 20 percent chance of showers and thunderstorms after 1pm. Sunny and hot, with a high near 99. South southwest wind around 5 mph.

Friday Night

A 20 percent chance of showers before 1am. Partly cloudy, with a low around 75. South southeast wind around 5 mph.

Saturday

A 40 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 95. Southeast wind around 5 mph becoming northeast in the afternoon.

Saturday Night

A 30 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 74. East wind around 5 mph.

Sunday

A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 90. Northeast wind around 5 mph.

Sunday Night

A slight chance of showers and thunderstorms, then a chance of showers after 1am. Mostly cloudy, with a low around 72. Chance of precipitation is 30%.

Labor Day

A 30 percent chance of showers. Partly sunny, with a high near 91.

Monday Night

Partly cloudy, with a low around 71.

Tuesday

A 20 percent chance of showers and thunderstorms. Sunny, with a high near 93.

Tuesday Night

Mostly clear, with a low around 71.

Wednesday

A slight chance of showers and thunderstorms. Mostly sunny, with a high near 94.