National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Snow Squalls May Impact New Year's Eve Travel from the Great Lakes to the Mid-Atlantic; Heavy Rain Returns to California

Lake effect snow will continue through Friday bringing significant snowfall to areas east to southeast of the Great Lakes. Snow squalls may impact New Year's Eve travel this evening and overnight across parts of the Great Lakes, Ohio Valley, Mid-Atlantic, and Upstate New York. Heavy rain will bring another flash flooding threat for southern California New Year's Eve into New Year's Day. Read More >

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Fair

43°F

6°C

Humidity 49%
Wind Speed W 3 mph
Barometer 30.36 in (1028.2 mb)
Dewpoint 25°F (-4°C)
Visibility 10.00 mi
Last update 31 Dec 8:56 am CST
Extended Forecast for

5 Miles SW San Marcos TX

  • Today

    Today: Sunny, with a high near 68. South southwest wind 5 to 10 mph.

    High: 68 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 42. Southwest wind around 5 mph.

    Low: 42 °F

    Mostly Clear

  • New Year's Day

    New Year's Day: Mostly sunny, with a high near 73. South southwest wind 5 to 15 mph, with gusts as high as 20 mph.

    High: 73 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 54. Southwest wind 5 to 10 mph.

    Low: 54 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 85. West wind around 10 mph, with gusts as high as 20 mph.

    High: 85 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 53. West wind around 5 mph becoming north northwest after midnight.

    Low: 53 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 75. North wind 5 to 10 mph.

    High: 75 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 46. Northeast wind around 5 mph becoming calm in the evening.

    Low: 46 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 75. Calm wind becoming south southeast around 5 mph in the afternoon.

    High: 75 °F

    Sunny

Detailed Forecast

Today
Sunny, with a high near 68. South southwest wind 5 to 10 mph.
Tonight
Mostly clear, with a low around 42. Southwest wind around 5 mph.
New Year's Day
Mostly sunny, with a high near 73. South southwest wind 5 to 15 mph, with gusts as high as 20 mph.
Thursday Night
Partly cloudy, with a low around 54. Southwest wind 5 to 10 mph.
Friday
Sunny, with a high near 85. West wind around 10 mph, with gusts as high as 20 mph.
Friday Night
Clear, with a low around 53. West wind around 5 mph becoming north northwest after midnight.
Saturday
Sunny, with a high near 75. North wind 5 to 10 mph.
Saturday Night
Clear, with a low around 46. Northeast wind around 5 mph becoming calm in the evening.
Sunday
Sunny, with a high near 75. Calm wind becoming south southeast around 5 mph in the afternoon.
Sunday Night
Partly cloudy, with a low around 54.
Monday
Mostly cloudy, with a high near 76.
Monday Night
Mostly cloudy, with a low around 57.
Tuesday
Partly sunny, with a high near 78.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles SW San Marcos TX
 29.81°N 97.99°W (Elev. 653 ft)
Last Update:
7:42 am CST Dec 31, 2025
Forecast Valid:
9am CST Dec 31, 2025-6pm CST Jan 6, 2026
 
Forecast Discussion
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation