Areas of Excessive Rainfall; Refreshingly Cool Air Remains over Much of the Central and Eastern U.S.

Heavy thunderstorms may bring excessive rainfall and possible flooding over parts of the northern Gulf Coast Friday and over parts of Texas and New Mexico Friday through the weekend. A refreshingly cool and dry air mass will continue to produce below average temperatures over much of the central and eastern U.S. into this weekend. Read More >

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Fair

86°F

30°C

Humidity	61%
Wind Speed	S 10 mph
Barometer	29.97 in (1013.8 mb)
Dewpoint	71°F (22°C)
Visibility	10.00 mi
Heat Index	91°F (33°C)
Last update	28 Aug 10:56 pm CDT

More Information:

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

Extended Forecast for

San Marcos TX

Tonight
Low: 75 °F
Mostly Clear
Friday
High: 100 °F
Hot
Friday Night
Low: 75 °F
Partly Cloudy
Saturday
High: 98 °F
Mostly Sunny
then Chance
T-storms
Saturday Night
Low: 75 °F
Chance
Showers
Sunday
High: 92 °F
Showers
Likely
Sunday Night
Low: 72 °F
Chance
T-storms
Labor Day
High: 91 °F
Chance
Showers then
Chance
T-storms
Monday Night
Low: 70 °F
Partly Cloudy

Detailed Forecast

Tonight

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

Friday

Increasing clouds and hot, with a high near 100. Heat index values as high as 105. South southwest wind around 5 mph.

Friday Night

Partly cloudy, with a low around 75. East northeast wind around 5 mph becoming south after midnight.

Saturday

A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 98. Heat index values as high as 105. Calm wind becoming south southeast around 5 mph in the morning.

Saturday Night

A chance of showers and thunderstorms. Mostly cloudy, with a low around 75. East wind around 5 mph becoming calm after midnight. Chance of precipitation is 30%.

Sunday

A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 92. Calm wind becoming east around 5 mph in the morning. Chance of precipitation is 60%.

Sunday Night

A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 72. East northeast wind around 5 mph becoming calm in the evening.

Labor Day

A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 91. North northeast wind around 5 mph.

Monday Night

Partly cloudy, with a low around 70. Northeast wind around 5 mph becoming calm in the evening.

Tuesday

A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 94.

Tuesday Night

Mostly clear, with a low around 70.

Wednesday

Mostly sunny, with a high near 94.