Snow Squalls May Impact New Year's Eve Travel from the Great Lakes to the Mid-Atlantic; Heavy Rain & Isolated Severe Thunderstorms in Southern California

Snow squalls are likely to cross the Lower Great Lakes this evening and the Ohio Valley through the interior Northeast/northern Mid-Atlantic overnight, before potentially reaching the I-95 corridor from D.C. to New York City early New Year’s Day morning. Heavy rain and isolated severe thunderstorms will impact coastal southern California including Los Angeles tonight into early on New Year's Day. Read More >

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

N/A

Humidity NA
Wind Speed NA
Barometer NA
Dewpoint N/A
Visibility NA
Last update *** Not a current observation ***
Extended Forecast for

San Marcos TX

  • Tonight

    Tonight: Mostly clear, with a low around 40. Southwest wind around 5 mph.

    Low: 40 °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 25 mph.

    High: 73 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, then gradually becoming clear, with a low around 54. South southwest wind 5 to 10 mph.

    Low: 54 °F

    Decreasing
    Clouds

  • Friday

    Friday: Sunny, with a high near 86. West wind 5 to 10 mph, with gusts as high as 25 mph.

    High: 86 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 56. West wind around 5 mph.

    Low: 56 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 76. Northwest wind 5 to 10 mph becoming north northeast in the afternoon. Winds could gust as high as 20 mph.

    High: 76 °F

    Sunny

  • Saturday Night

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

    Low: 46 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 74. Calm wind becoming southeast around 5 mph in the afternoon.

    High: 74 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 51. South wind around 5 mph.

    Low: 51 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 40. 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 25 mph.
Thursday Night
Mostly cloudy, then gradually becoming clear, with a low around 54. South southwest wind 5 to 10 mph.
Friday
Sunny, with a high near 86. West wind 5 to 10 mph, with gusts as high as 25 mph.
Friday Night
Mostly clear, with a low around 56. West wind around 5 mph.
Saturday
Sunny, with a high near 76. Northwest wind 5 to 10 mph becoming north northeast in the afternoon. Winds could gust as high as 20 mph.
Saturday Night
Clear, with a low around 46. North northeast wind around 5 mph becoming calm in the evening.
Sunday
Sunny, with a high near 74. Calm wind becoming southeast around 5 mph in the afternoon.
Sunday Night
Partly cloudy, with a low around 51. South wind around 5 mph.
Monday
Partly sunny, with a high near 76.
Monday Night
Partly cloudy, with a low around 57.
Tuesday
Mostly sunny, with a high near 81.
Tuesday Night
Partly cloudy, with a low around 56.
Wednesday
Mostly sunny, with a high near 79.
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ABOUT THIS FORECAST

 
Point Forecast:
San Marcos TX
 29.9°N 97.91°W (Elev. 640 ft)
5:42 pm CST Dec 31, 2025
6pm CST Dec 31, 2025-6pm CST Jan 7, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database