Atmospheric River Bringing Heavy Rain to Southern California and Heavy Snow to the Sierra Nevadas

A strong atmospheric river will continue heavy rain over southern California through Friday. The heaviest rainfall is ongoing today in the Los Angeles Basin. Flash and urban flooding is possible. A prolonged heavy snowfall has begun over the Sierra Nevada Mountains and will continue through Friday. Travel will become increasingly difficult over the passes due to snow and strong winds. Read More >

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Overcast

67°F

19°C

Humidity	93%
Wind Speed	S 7 mph
Barometer	30.20 in (1022.1 mb)
Dewpoint	65°F (18°C)
Visibility	10.00 mi
Last update	25 Dec 2:56 am CST

More Information:

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

Extended Forecast for

San Marcos TX

Overnight
Low: 63 °F
Areas Fog
Christmas Day
High: 79 °F
Fog then
Mostly Sunny
Thursday Night
Low: 64 °F
Increasing
Clouds
Friday
High: 81 °F
Gradual
Clearing
Friday Night
Low: 65 °F
Partly Cloudy
Saturday
High: 80 °F
Partly Sunny
Saturday Night
Low: 65 °F
Mostly Cloudy
Sunday
High: 79 °F
Mostly Cloudy
Sunday Night
Low: 42 °F
Chance
Showers

Detailed Forecast

Overnight

Areas of fog. Otherwise, mostly cloudy, with a low around 63. South southwest wind around 5 mph.

Christmas Day

Widespread fog, mainly before 9am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 79. South southwest wind 5 to 10 mph.

Thursday Night

Increasing clouds, with a low around 64. South southwest wind around 5 mph.

Friday

Cloudy through mid morning, then gradual clearing, 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 65. South wind 5 to 10 mph.

Saturday

Partly sunny, with a high near 80. South wind 5 to 10 mph, with gusts as high as 20 mph.

Saturday Night

Mostly cloudy, with a low around 65. South wind around 10 mph.

Sunday

Mostly cloudy, with a high near 79. South wind 5 to 10 mph, with gusts as high as 20 mph.

Sunday Night

A 40 percent chance of showers. Mostly cloudy, with a low around 42. West southwest wind 5 to 10 mph becoming north 15 to 20 mph after midnight. Winds could gust as high as 30 mph.

Monday

Mostly cloudy, with a high near 50.

Monday Night

Mostly cloudy, with a low around 34.

Tuesday

Partly sunny, with a high near 53.

Tuesday Night

Partly cloudy, with a low around 33.

Wednesday

Sunny, with a high near 60.