Significant Winter Storm to Bring Heavy Snow and Ice Impacts; Dangerously Cold Temperatures Expands Across the East; Severe Storm Threat in the Gulf States Sunday

A significant winter storm is underway, bringing widespread heavy snow, sleet, and freezing rain from the Southern Rockies to New England through Monday. Extremely cold air will follow, prolonging dangerous travel and infrastructure impacts into next week. Severe thunderstorms may produce damaging gusts and tornadoes across the eastern Gulf Coast states Sunday morning and afternoon. Read More >

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Fog/Mist

24°F

-4°C

Humidity 88%
Wind Speed N 15 mph
Barometer 30.09 in (1019.2 mb)
Dewpoint 21°F (-6°C)
Visibility 3.00 mi
Wind Chill11°F (-12°C)
Last update 25 Jan 4:56 am CST
Extended Forecast for

3 Miles WSW San Marcos TX

Extreme Cold Warning until January 26, 12:00pm
Ice Storm Warning until January 25, 12:00pm
Click here for hazard details and duration
Extreme Cold Warning
Ice Storm Warning
  •  
    Extreme Cold Warning until January 26, 12:00pm
    Ice Storm Warning until January 25, 12:00pm

    NOW: Multiple hazards in effect

    Click HERE for Details

  • Overnight

    Low: 21 °F

    Chance Wintry
    Mix

  • Sunday

    Sunday: Partly sunny, with a high near 29. North northwest wind around 15 mph, with gusts as high as 30 mph.

    High: 29 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 16. North wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 16 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 35. North wind 5 to 15 mph, with gusts as high as 20 mph.

    High: 35 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 14. North wind around 5 mph becoming calm  in the evening.

    Low: 14 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 47. Calm wind becoming south southwest around 5 mph in the morning.

    High: 47 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 25. Calm wind becoming northwest around 5 mph after midnight.

    Low: 25 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 48. North wind around 5 mph.

    High: 48 °F

    Sunny

Detailed Forecast

Overnight
A chance of freezing rain and sleet. Mostly cloudy, with a low around 21. North wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 30%. Little or no sleet accumulation expected.
Sunday
Partly sunny, with a high near 29. North northwest wind around 15 mph, with gusts as high as 30 mph.
Sunday Night
Mostly clear, with a low around 16. North wind 10 to 15 mph, with gusts as high as 25 mph.
Monday
Sunny, with a high near 35. North wind 5 to 15 mph, with gusts as high as 20 mph.
Monday Night
Mostly clear, with a low around 14. North wind around 5 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 47. Calm wind becoming south southwest around 5 mph in the morning.
Tuesday Night
Partly cloudy, with a low around 25. Calm wind becoming northwest around 5 mph after midnight.
Wednesday
Sunny, with a high near 48. North wind around 5 mph.
Wednesday Night
Mostly clear, with a low around 25. North wind around 5 mph becoming calm in the evening.
Thursday
Partly sunny, with a high near 54.
Thursday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 38.
Friday
A 40 percent chance of showers. Mostly cloudy, with a high near 52.
Friday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 30.
Saturday
Mostly sunny, with a high near 45.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles WSW San Marcos TX
 29.86°N 97.97°W (Elev. 646 ft)
5:08 am CST Jan 25, 2026
5am CST Jan 25, 2026-6pm CST Jan 31, 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