Areas of Heavy to Excessive Rainfall Which May Bring Flooding

An area of thunderstorms and heavy rains may produce flash flooding in the central and southern Plains, specifically southeast Kansas, into the morning. Monsoon moisture will continue to produce areas of heavy rainfall and the potential for flooding and debris flows across the northern Intermountain West. Heavy rain continues across portions of southwest and south-central Alaska. Read More >

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Fair

79°F

26°C

Humidity	77%
Wind Speed	E 5 mph
Barometer	30.08 in (1017.9 mb)
Dewpoint	71°F (22°C)
Visibility	10.00 mi
Heat Index	82°F (28°C)
Last update	28 Aug 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: 75 °F
Partly Cloudy
Thursday
High: 98 °F
Becoming
Sunny
Thursday Night
Low: 76 °F
Mostly Clear
Friday
High: 98 °F
Mostly Sunny
then Slight
Chance
T-storms
Friday Night
Low: 75 °F
Slight Chance
T-storms then
Partly Cloudy
Saturday
High: 97 °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
Sunday Night
Low: 73 °F
Chance
T-storms

Detailed Forecast

Overnight

Partly cloudy, with a low around 75. South wind around 5 mph.

Thursday

Partly sunny, then gradually becoming sunny, with a high near 98. Heat index values as high as 102. South southwest wind 5 to 10 mph.

Thursday Night

Mostly clear, with a low around 76. South wind 5 to 10 mph.

Friday

A slight chance of showers between 1pm and 4pm, then a slight chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 98. Heat index values as high as 102. South southwest wind 5 to 10 mph. Chance of precipitation is 20%.

Friday Night

A slight chance of thunderstorms before 7pm. Partly cloudy, with a low around 75. South southeast wind around 5 mph. Chance of precipitation is 10%.

Saturday

A 40 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 97. South southwest wind around 5 mph becoming east in the afternoon.

Saturday Night

A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 74. East wind around 5 mph becoming calm after midnight. Chance of precipitation is 40%.

Sunday

A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 90. East southeast wind around 5 mph becoming south southwest in the morning.

Sunday Night

A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 73. Northeast wind 5 to 10 mph.

Labor Day

A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 90. Chance of precipitation is 30%.

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

Sunny, with a high near 95.