High-Impact and Far-Reaching Winter Storm Continues; Cold Expands and Persists

A major winter storm will shift its impacts into the Northeast U.S. with heavy snow through tonight while over the Mid-Atlantic, sleet and freezing rain will diminish. Extremely cold air behind the storm will prolong dangerous travel and infrastructure impacts. Sub-zero low temperatures are expected nearly every morning from the Northern Plains through the Ohio Valley and into the Northeast. Read More >

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Fog/Mist

20°F

-7°C

Humidity 85%
Wind Speed N 12 mph
Barometer 30.51 in (1033.7 mb)
Dewpoint 16°F (-9°C)
Visibility 3.00 mi
Wind Chill8°F (-13°C)
Last update 26 Jan 3:56 am CST
Extended Forecast for

3 Miles WNW San Marcos TX

Extreme Cold Warning January 26, 04:51am until January 26, 12:00pm
Click here for hazard details and duration
Extreme Cold Warning
  •  
    Extreme Cold Warning January 26, 04:51am until January 26, 12:00pm

    NOW until 12:00pm Mon

    Extreme Cold Warning

  • Today

    High: 36 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 14. North wind around 5 mph becoming calm.

    Low: 14 °F

    Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 46. Calm wind becoming south southwest around 5 mph in the morning.

    High: 46 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 23. Calm wind becoming west northwest around 5 mph after midnight.

    Low: 23 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 50. Northwest wind around 5 mph becoming northeast in the afternoon.

    High: 50 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 26. Calm wind.

    Low: 26 °F

    Partly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 56. Calm wind becoming south around 5 mph in the afternoon.

    High: 56 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: A 20 percent chance of showers.  Mostly cloudy, with a low around 35. Southwest wind 5 to 10 mph becoming north after midnight. Winds could gust as high as 20 mph.

    Low: 35 °F

    Slight Chance
    Showers

Detailed Forecast

Today
Sunny, with a high near 36. North wind 5 to 10 mph, with gusts as high as 20 mph.
Tonight
Clear, with a low around 14. North wind around 5 mph becoming calm.
Tuesday
Mostly sunny, with a high near 46. Calm wind becoming south southwest around 5 mph in the morning.
Tuesday Night
Mostly clear, with a low around 23. Calm wind becoming west northwest around 5 mph after midnight.
Wednesday
Sunny, with a high near 50. Northwest wind around 5 mph becoming northeast in the afternoon.
Wednesday Night
Partly cloudy, with a low around 26. Calm wind.
Thursday
Partly sunny, with a high near 56. Calm wind becoming south around 5 mph in the afternoon.
Thursday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 35. Southwest wind 5 to 10 mph becoming north after midnight. Winds could gust as high as 20 mph.
Friday
Mostly cloudy, with a high near 49. North wind around 10 mph, with gusts as high as 25 mph.
Friday Night
Partly cloudy, with a low around 24.
Saturday
Sunny, with a high near 46.
Saturday Night
Mostly clear, with a low around 24.
Sunday
Sunny, with a high near 55.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles WNW San Marcos TX
 29.9°N 97.97°W (Elev. 686 ft)
4:42 am CST Jan 26, 2026
4am CST Jan 26, 2026-6pm CST Feb 1, 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