Flooding Threat Along the Gulf Coast, Southern Rockies and High Plains; Cooler Weather in the Central and Eastern U.S.

Strong thunderstorms may bring excessive rainfall and flooding over parts of the northern Gulf Coast today and over parts of the southern Rockies into the High Plains today through the weekend. A refreshingly cool and dry air mass will continue to produce below average temperatures across the central and eastern U.S. through the weekend. Read More >

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Fair

96°F

36°C

Humidity	41%
Wind Speed	SW 9 mph
Barometer	29.95 in (1013.2 mb)
Dewpoint	69°F (21°C)
Visibility	10.00 mi
Heat Index	101°F (38°C)
Last update	30 Aug 12:56 pm CDT

More Information:

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

Extended Forecast for

5 Miles SW San Marcos TX

This Afternoon
High: 97 °F
Slight Chance
T-storms
Tonight
Low: 75 °F
Slight Chance
T-storms
Sunday
High: 92 °F
Slight Chance
T-storms then
Showers
Likely
Sunday Night
Low: 73 °F
Showers
Likely
Labor Day
High: 87 °F
Showers
Likely
Monday Night
Low: 71 °F
Slight Chance
Showers
Tuesday
High: 92 °F
Sunny
Tuesday Night
Low: 70 °F
Mostly Clear
Wednesday
High: 94 °F
Sunny

Detailed Forecast

This Afternoon

A 20 percent chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 97. Heat index values as high as 104. Southeast wind around 5 mph.

Tonight

A slight chance of showers and thunderstorms before 1am, then a slight chance of showers after 4am. Mostly cloudy, with a low around 75. East southeast wind around 5 mph becoming south southwest after midnight. Chance of precipitation is 20%.

Sunday

A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 4pm. Partly sunny, with a high near 92. Heat index values as high as 101. Calm wind becoming east northeast around 5 mph in the afternoon. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Sunday Night

Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 73. East northeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 60%.

Labor Day

Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 87. North northeast wind around 5 mph. Chance of precipitation is 70%.

Monday Night

A 20 percent chance of showers before 1am. Mostly cloudy, with a low around 71. Northeast wind around 5 mph becoming calm in the evening.

Tuesday

Sunny, with a high near 92. North wind around 5 mph.

Tuesday Night

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

Wednesday

Sunny, with a high near 94. North wind around 5 mph.

Wednesday Night

Mostly clear, with a low around 68.

Thursday

Mostly sunny, with a high near 92.