Tracking Late December Winter Storm Expected to Impact the Northern Plains through the Northeast U.S.

A winter storm system will rapidly intensify over the Midwest on Sunday and track through the Great Lakes on Monday. Periods of heavy snow are anticipated across the Upper Great Lakes late Sunday and continuing into Monday. At least 1/10 inch of ice accumulation is expected from a wintry mix across much of the interior Northeast U.S. starting Sunday afternoon. Read More >

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Overcast

79°F

26°C

Humidity	62%
Wind Speed	S 17 mph
Barometer	29.91 in (1012.1 mb)
Dewpoint	65°F (18°C)
Visibility	10.00 mi
Heat Index	81°F (27°C)
Last update	27 Dec 1:56 pm CST

More Information:

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

Extended Forecast for

San Marcos TX

This Afternoon
High: 80 °F
Mostly Sunny
Tonight
Low: 66 °F
Increasing
Clouds
Sunday
High: 79 °F
Decreasing
Clouds
Sunday Night
Low: 43 °F
Chance
Showers then
Mostly Cloudy
and Breezy
Monday
High: 52 °F
Partly Sunny
and Breezy
then Mostly
Cloudy
Monday Night
Low: 38 °F
Mostly Cloudy
Tuesday
High: 54 °F
Partly Sunny
Tuesday Night
Low: 35 °F
Partly Cloudy
Wednesday
High: 59 °F
Mostly Sunny

Detailed Forecast

This Afternoon

Mostly sunny, with a high near 80. South wind around 10 mph, with gusts as high as 20 mph.

Tonight

Increasing clouds, with a low around 66. South wind around 10 mph, with gusts as high as 20 mph.

Sunday

Cloudy, then gradually becoming mostly sunny, with a high near 79. South wind 5 to 10 mph, with gusts as high as 20 mph.

Sunday Night

A 30 percent chance of showers before midnight. Mostly cloudy, with a low around 43. Breezy, with a west southwest wind 5 to 10 mph becoming north 15 to 25 mph in the evening. Winds could gust as high as 40 mph.

Monday

Partly sunny, with a high near 52. Breezy, with a north wind 15 to 25 mph, with gusts as high as 40 mph.

Monday Night

Mostly cloudy, with a low around 38. North wind 10 to 15 mph, with gusts as high as 25 mph.

Tuesday

Partly sunny, with a high near 54. North wind 5 to 10 mph.

Tuesday Night

Partly cloudy, with a low around 35. Calm wind.

Wednesday

Mostly sunny, with a high near 59. Calm wind becoming south southwest around 5 mph in the morning.

Wednesday Night

Partly cloudy, with a low around 40.