River Flooding Continues to be a Concern for Multiple Regions across the Country

Recent rainfall has increased the threat of Moderate to Major flooding along rivers in the Mid-Atlantic, especially Virginia and Maryland, over the next few days. Rainfall combined with snowmelt is also fueling Moderate-to-Major flooding in the northern Rockies and northern Intermountain West. Read More >

Hazardous Weather Conditions

Hazardous Weather Outlook

En Español

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Mostly Cloudy

78°F

26°C

Humidity	87%
Wind Speed	SE 7 mph
Barometer	30.01 in (1015.1 mb)
Dewpoint	74°F (23°C)
Visibility	10.00 mi
Heat Index	80°F (27°C)
Last update	20 May 9:56 am CDT

More Information:

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

Extended Forecast for

San Marcos TX

Today

T-storms
High: 88 °F
Tonight

Chance
T-storms
Low: 70 °F
Monday

Chance
T-storms
High: 88 °F
Monday
Night

Mostly Cloudy
Low: 69 °F
Tuesday

Partly Sunny
High: 90 °F
Tuesday
Night

Partly Cloudy
Low: 69 °F
Wednesday

Mostly Sunny
High: 93 °F
Wednesday
Night

Partly Cloudy
Low: 68 °F
Thursday

Mostly Sunny
High: 93 °F

Detailed Forecast

Today

Showers and thunderstorms. High near 88. South southeast wind around 15 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

Tonight

A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 70. East southeast wind 5 to 10 mph.

Monday

A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 88. East southeast wind 5 to 10 mph.

Monday Night

Mostly cloudy, with a low around 69. East southeast wind 5 to 10 mph.

Tuesday

Partly sunny, with a high near 90. Southeast wind 5 to 10 mph.

Tuesday Night

Partly cloudy, with a low around 69. Southeast wind 5 to 10 mph.

Wednesday

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