Winter Storm in the Central Appalachians through the Northeast; Heavy Snow in the Great Basin and Rockies

A winter storm will impact the central Appalachians to the Northeast through the night. Accumulating snow is expected for interior New England and the northern Mid-Atlantic. Scattered showers and occasional thunderstorms will persist across Florida and the Southeast coast. Locally heavy mountain snow is expected in the Great Basin and Rockies over the next couple of days. Read More >

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Fair

39°F

4°C

Humidity 79%
Wind Speed S 6 mph
Barometer 30.04 in (1017.0 mb)
Dewpoint 33°F (1°C)
Visibility 10.00 mi
Wind Chill35°F (2°C)
Last update 3 Dec 2:56 am CST
Extended Forecast for

San Marcos Municipal Airport TX

  • Overnight

    Overnight: Partly cloudy, with a low around 36. South wind around 5 mph.

    Low: 36 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Increasing clouds, with a high near 65. South wind 5 to 10 mph.

    High: 65 °F

    Increasing
    Clouds

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers and thunderstorms, mainly before 3am.  Cloudy, with a low around 48. Light and variable wind becoming north 10 to 15 mph after midnight. Winds could gust as high as 20 mph.

    Low: 48 °F

    Chance
    Showers

  • Thursday

    Thursday: A 50 percent chance of showers.  Cloudy, with a high near 53. North wind 15 to 20 mph, with gusts as high as 30 mph.

    High: 53 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: A 40 percent chance of showers, mainly after midnight.  Cloudy, with a low around 41. North wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 41 °F

    Chance
    Showers

  • Friday

    Friday: A 30 percent chance of showers before noon.  Cloudy, with a high near 54. North wind 5 to 10 mph becoming south southeast in the afternoon.

    High: 54 °F

    Chance
    Showers then
    Cloudy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 45. South southeast wind around 5 mph becoming calm.

    Low: 45 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 70. Southwest wind 5 to 10 mph.

    High: 70 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 46. South southwest wind 5 to 10 mph becoming northwest after midnight.

    Low: 46 °F

    Mostly Clear

Detailed Forecast

Overnight
Partly cloudy, with a low around 36. South wind around 5 mph.
Wednesday
Increasing clouds, with a high near 65. South wind 5 to 10 mph.
Wednesday Night
A 30 percent chance of showers and thunderstorms, mainly before 3am. Cloudy, with a low around 48. Light and variable wind becoming north 10 to 15 mph after midnight. Winds could gust as high as 20 mph.
Thursday
A 50 percent chance of showers. Cloudy, with a high near 53. North wind 15 to 20 mph, with gusts as high as 30 mph.
Thursday Night
A 40 percent chance of showers, mainly after midnight. Cloudy, with a low around 41. North wind 10 to 15 mph, with gusts as high as 25 mph.
Friday
A 30 percent chance of showers before noon. Cloudy, with a high near 54. North wind 5 to 10 mph becoming south southeast in the afternoon.
Friday Night
Mostly cloudy, with a low around 45. South southeast wind around 5 mph becoming calm.
Saturday
Mostly sunny, with a high near 70. Southwest wind 5 to 10 mph.
Saturday Night
Mostly clear, with a low around 46. South southwest wind 5 to 10 mph becoming northwest after midnight.
Sunday
Sunny, with a high near 73.
Sunday Night
Mostly clear, with a low around 41.
Monday
Sunny, with a high near 67.
Monday Night
Partly cloudy, with a low around 41.
Tuesday
Mostly sunny, with a high near 69.
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ABOUT THIS FORECAST

 
Point Forecast:
San Marcos Municipal Airport TX
 29.9°N 97.86°W (Elev. 600 ft)
1:42 am CST Dec 3, 2025
3am CST Dec 3, 2025-6pm CST Dec 9, 2025
 
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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