Snow in the Rockies; Showers and Thunderstorms Along the Gulf Coast; Potential Winter Storm for Northern Mid-Atlantic and Interior New England

A winter-like pattern will continue over much of the Lower 48 over the next few days, with snow stretching from the Rockies today into the Middle Mississippi Valley on Monday. Showers and thunderstorms will develop along the Gulf Coast and Southeast on Monday. As the storm moves northward late Monday into Tuesday, winter weather is possible from the Central Appalachians to Interior New England. Read More >

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Overcast

42°F

6°C

Humidity 76%
Wind Speed N 9 mph
Barometer 30.18 in (1021.7 mb)
Dewpoint 35°F (2°C)
Visibility 10.00 mi
Wind Chill37°F (3°C)
Last update 1 Dec 4:56 am CST
Extended Forecast for

San Marcos TX

  • Overnight

    Overnight: A 30 percent chance of showers.  Cloudy, with a low around 40. North northeast wind around 5 mph.

    Low: 40 °F

    Chance
    Showers

  • Monday

    Monday: A 30 percent chance of showers, mainly before noon.  Cloudy, with a high near 52. North northeast wind around 5 mph.

    High: 52 °F

    Chance
    Showers

  • Monday Night

    Monday Night: Cloudy during the early evening, then gradual clearing, with a low around 36. North wind 5 to 10 mph.

    Low: 36 °F

    Gradual
    Clearing

  • Tuesday

    Tuesday: Mostly sunny, with a high near 58. North wind 5 to 10 mph becoming east southeast in the afternoon.

    High: 58 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 40. Southeast wind around 5 mph becoming calm.

    Low: 40 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 65. South wind around 5 mph.

    High: 65 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: A chance of showers before midnight, then a chance of showers and thunderstorms between midnight and 3am, then a chance of showers after 3am.  Cloudy, with a low around 48. Light and variable wind becoming north 5 to 10 mph after midnight.  Chance of precipitation is 30%.

    Low: 48 °F

    Chance
    Showers then
    Chance
    T-storms

  • Thursday

    Thursday: A 50 percent chance of showers and thunderstorms.  Cloudy, with a high near 55. North wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 55 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: A 50 percent chance of showers.  Cloudy, with a low around 42. North wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 42 °F

    Chance
    Showers

Detailed Forecast

Overnight
A 30 percent chance of showers. Cloudy, with a low around 40. North northeast wind around 5 mph.
Monday
A 30 percent chance of showers, mainly before noon. Cloudy, with a high near 52. North northeast wind around 5 mph.
Monday Night
Cloudy during the early evening, then gradual clearing, with a low around 36. North wind 5 to 10 mph.
Tuesday
Mostly sunny, with a high near 58. North wind 5 to 10 mph becoming east southeast in the afternoon.
Tuesday Night
Partly cloudy, with a low around 40. Southeast wind around 5 mph becoming calm.
Wednesday
Mostly cloudy, with a high near 65. South wind around 5 mph.
Wednesday Night
A chance of showers before midnight, then a chance of showers and thunderstorms between midnight and 3am, then a chance of showers after 3am. Cloudy, with a low around 48. Light and variable wind becoming north 5 to 10 mph after midnight. Chance of precipitation is 30%.
Thursday
A 50 percent chance of showers and thunderstorms. Cloudy, with a high near 55. North wind 10 to 15 mph, with gusts as high as 25 mph.
Thursday Night
A 50 percent chance of showers. Cloudy, with a low around 42. North wind 5 to 10 mph, with gusts as high as 20 mph.
Friday
A 20 percent chance of showers before noon. Mostly cloudy, with a high near 58.
Friday Night
Mostly cloudy, with a low around 43.
Saturday
Mostly sunny, with a high near 69.
Saturday Night
Mostly clear, with a low around 46.
Sunday
Mostly sunny, with a high near 72.
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ABOUT THIS FORECAST

 
Point Forecast:
San Marcos TX
 29.88°N 97.91°W (Elev. 597 ft)
5:44 am CST Dec 1, 2025
5am CST Dec 1, 2025-6pm CST Dec 7, 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