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

Winter Storm Bringing Widespread Hazardous Weather to the Eastern U.S.

A rapidly-intensifying winter storm continues to bring heavy snow, high winds, and blizzard conditions over the Upper Midwest and Great Lakes through today. An Arctic front will lead in a period of gusty to high winds and sharply colder temperatures over the entire eastern U.S. Heavy lake effect snow is then expected from Lakes Erie and Ontario through New Year's Day. Read More >

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Overcast

44°F

7°C

Humidity 40%
Wind Speed N 8 mph
Barometer 30.52 in (1033.4 mb)
Dewpoint 21°F (-6°C)
Visibility 10.00 mi
Wind Chill39°F (4°C)
Last update 29 Dec 6:56 pm CST
Extended Forecast for

4 Miles WNW San Marcos TX

  • Tonight

    Tonight: Mostly cloudy, with a low around 37. North wind around 10 mph, with gusts as high as 20 mph.

    Low: 37 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, then gradually becoming sunny, with a high near 58. North wind around 5 mph becoming calm in the afternoon.

    High: 58 °F

    Becoming
    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 34. Calm wind becoming west around 5 mph after midnight.

    Low: 34 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 65. South southwest wind 5 to 10 mph.

    High: 65 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 41. South southwest wind around 5 mph.

    Low: 41 °F

    Partly Cloudy

  • New Year's Day

    New Year's Day: Partly sunny, with a high near 72. South southwest wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 72 °F

    Partly Sunny

  • Thursday Night

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

    Low: 54 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 84. Southwest wind around 10 mph, with gusts as high as 20 mph.

    High: 84 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 52. West southwest wind around 5 mph becoming north northwest after midnight.

    Low: 52 °F

    Clear

Detailed Forecast

Tonight
Mostly cloudy, with a low around 37. North wind around 10 mph, with gusts as high as 20 mph.
Tuesday
Partly sunny, then gradually becoming sunny, with a high near 58. North wind around 5 mph becoming calm in the afternoon.
Tuesday Night
Mostly clear, with a low around 34. Calm wind becoming west around 5 mph after midnight.
Wednesday
Sunny, with a high near 65. South southwest wind 5 to 10 mph.
Wednesday Night
Partly cloudy, with a low around 41. South southwest wind around 5 mph.
New Year's Day
Partly sunny, with a high near 72. South southwest wind 5 to 10 mph, with gusts as high as 20 mph.
Thursday Night
Partly cloudy, with a low around 54. South southwest wind 5 to 10 mph.
Friday
Sunny, with a high near 84. Southwest wind around 10 mph, with gusts as high as 20 mph.
Friday Night
Clear, with a low around 52. West southwest wind around 5 mph becoming north northwest after midnight.
Saturday
Sunny, with a high near 76.
Saturday Night
Mostly clear, with a low around 48.
Sunday
Sunny, with a high near 77.
Sunday Night
Mostly clear, with a low around 53.
Monday
Mostly sunny, with a high near 76.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles WNW San Marcos TX
 29.9°N 97.99°W (Elev. 850 ft)
Last Update:
5:46 pm CST Dec 29, 2025
Forecast Valid:
7pm CST Dec 29, 2025-6pm CST Jan 5, 2026
 
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Additional Resources

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