Heavy Rainfall to Bring Flooding Threat to California; Heavy Snow in the Sierra

A strong atmospheric river will bring heavy rainfall to California through the holiday week. The heaviest rainfall is expected on Wednesday in the Los Angeles Basin. Flash and urban flooding is possible. A prolonged heavy snowfall is expected in the Sierra Nevada from the atmospheric river, raising concerns for major snow‐load impacts. Travel may be difficult to impossible over the passes. Read More >

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Overcast

66°F

19°C

Humidity	93%
Wind Speed	S 5 mph
Barometer	30.26 in (1024.0 mb)
Dewpoint	64°F (18°C)
Visibility	10.00 mi
Last update	24 Dec 1:56 am CST

More Information:

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

Extended Forecast for

San Marcos TX

Overnight
Low: 64 °F
Patchy Dense
Fog
Wednesday
High: 79 °F
Areas Dense
Fog then
Mostly Sunny
Wednesday Night
Low: 62 °F
Increasing
Clouds
Christmas Day
High: 79 °F
Gradual
Clearing
Thursday Night
Low: 62 °F
Partly Cloudy
Friday
High: 81 °F
Partly Sunny
Friday Night
Low: 63 °F
Partly Cloudy
Saturday
High: 82 °F
Partly Sunny
Saturday Night
Low: 64 °F
Mostly Cloudy

Detailed Forecast

Overnight

Patchy dense fog. Otherwise, cloudy, with a low around 64. South wind around 5 mph becoming calm.

Wednesday

Areas of dense fog before 10am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 79. Light south wind increasing to 5 to 10 mph in the morning.

Wednesday Night

Increasing clouds, with a low around 62. South southwest wind around 5 mph.

Christmas Day

Cloudy through mid morning, then gradual clearing, with a high near 79. South southwest wind 5 to 10 mph.

Thursday Night

Partly cloudy, with a low around 62. South wind around 5 mph.

Friday

Partly sunny, with a high near 81. South southwest wind 5 to 10 mph, with gusts as high as 20 mph.

Friday Night

Partly cloudy, with a low around 63. South wind around 5 mph.

Saturday

Partly sunny, with a high near 82. South wind 5 to 10 mph, with gusts as high as 20 mph.