Another Arctic Blast in the East; Eastern U.S. Winter Storm

A powerful Arctic blast will bring dangerously cold, record low temperatures to the upper Ohio Valley, Mid-Atlantic, Gulf Coast and Southeast U.S. this weekend. A rapidly deepening storm will produce widespread heavy snow and wind from the southern Appalachians across the Carolinas and southern Virginia into Sunday. Storm-force winds and coastal flooding will be possible along the East Coast. Read More >

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Fair

27°F

-3°C

Humidity 63%
Wind Speed N 7 mph
Barometer 30.54 in (1034.7 mb)
Dewpoint 16°F (-9°C)
Visibility 10.00 mi
Wind Chill19°F (-7°C)
Last update 1 Feb 7:56 am CST
Extended Forecast for

5 Miles SW San Marcos TX

  • Today

    Today: Sunny, with a high near 58. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 58 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 37. West southwest wind around 5 mph.

    Low: 37 °F

    Mostly Clear

  • Monday

    Monday: Increasing clouds, with a high near 67. South southwest wind 5 to 15 mph, with gusts as high as 25 mph.

    High: 67 °F

    Increasing
    Clouds

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 57. South wind around 10 mph, with gusts as high as 20 mph.

    Low: 57 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 72. South southwest wind around 10 mph becoming north in the afternoon.

    High: 72 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 46. North wind around 10 mph, with gusts as high as 20 mph.

    Low: 46 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 66. North northeast wind around 10 mph, with gusts as high as 20 mph.

    High: 66 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 38. North northeast wind 5 to 10 mph.

    Low: 38 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 66. North northwest wind around 5 mph becoming south southwest in the afternoon.

    High: 66 °F

    Sunny

Detailed Forecast

Today
Sunny, with a high near 58. Calm wind becoming southwest around 5 mph in the afternoon.
Tonight
Mostly clear, with a low around 37. West southwest wind around 5 mph.
Monday
Increasing clouds, with a high near 67. South southwest wind 5 to 15 mph, with gusts as high as 25 mph.
Monday Night
Mostly cloudy, with a low around 57. South wind around 10 mph, with gusts as high as 20 mph.
Tuesday
Mostly cloudy, with a high near 72. South southwest wind around 10 mph becoming north in the afternoon.
Tuesday Night
Partly cloudy, with a low around 46. North wind around 10 mph, with gusts as high as 20 mph.
Wednesday
Mostly sunny, with a high near 66. North northeast wind around 10 mph, with gusts as high as 20 mph.
Wednesday Night
Mostly clear, with a low around 38. North northeast wind 5 to 10 mph.
Thursday
Sunny, with a high near 66. North northwest wind around 5 mph becoming south southwest in the afternoon.
Thursday Night
Mostly clear, with a low around 41.
Friday
Sunny, with a high near 74.
Friday Night
Mostly clear, with a low around 44.
Saturday
Sunny, with a high near 74.
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles SW San Marcos TX
 29.81°N 97.99°W (Elev. 653 ft)
5:45 am CST Feb 1, 2026
8am CST Feb 1, 2026-6pm CST Feb 7, 2026
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database