Heavy Snow from the Midwest into the Great Lakes; Locally Heavy Rain in the Western Gulf Coast

A significant winter storm will produce a broad area of moderate to heavy snow from the Midwest through the western Great Lakes. Significant snow accumulations of 6-12 inches, and locally more than 1 foot, and gusty wind may cause hazardous travel conditions. Thunderstorms, some severe, and showers may produce locally heavy rain and isolated flash flooding along the western Gulf Coast. Read More >

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Overcast

56°F

13°C

Humidity 87%
Wind Speed N 18 G 25 mph
Barometer 30.15 in (1020.3 mb)
Dewpoint 52°F (11°C)
Visibility 10.00 mi
Last update 30 Nov 1:56 am CST
Extended Forecast for

3 Miles WSW San Marcos TX

  • Overnight

    Overnight: A 20 percent chance of showers before 3am.  Mostly cloudy, with a low around 44. North wind around 20 mph, with gusts as high as 35 mph.

    Low: 44 °F

    Slight Chance
    Showers

  • Sunday

    Sunday: Cloudy, with a high near 51. North northeast wind 15 to 20 mph, with gusts as high as 35 mph.

    High: 51 °F

    Cloudy

  • Sunday Night

    Sunday Night: A 30 percent chance of showers, mainly after 3am.  Cloudy, with a low around 40. North northeast wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 40 °F

    Cloudy then
    Chance
    Showers

  • Monday

    Monday: A 40 percent chance of showers.  Cloudy, with a high near 51. North northeast wind 5 to 10 mph.

    High: 51 °F

    Chance
    Showers

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 37. North wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 37 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 57. North northeast wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 57 °F

    Mostly Sunny

  • Tuesday Night

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

    Low: 40 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Cloudy, with a high near 64. South wind around 5 mph becoming east in the afternoon.

    High: 64 °F

    Cloudy

  • Wednesday Night

    Wednesday Night: A chance of showers, with thunderstorms also possible after midnight.  Cloudy, with a low around 50. Light east northeast wind becoming north 5 to 10 mph after midnight.  Chance of precipitation is 40%.

    Low: 50 °F

    Chance
    Showers

Detailed Forecast

Overnight
A 20 percent chance of showers before 3am. Mostly cloudy, with a low around 44. North wind around 20 mph, with gusts as high as 35 mph.
Sunday
Cloudy, with a high near 51. North northeast wind 15 to 20 mph, with gusts as high as 35 mph.
Sunday Night
A 30 percent chance of showers, mainly after 3am. Cloudy, with a low around 40. North northeast wind 10 to 15 mph, with gusts as high as 25 mph.
Monday
A 40 percent chance of showers. Cloudy, with a high near 51. North northeast wind 5 to 10 mph.
Monday Night
Mostly cloudy, with a low around 37. North wind 5 to 10 mph, with gusts as high as 20 mph.
Tuesday
Mostly sunny, with a high near 57. North northeast wind 5 to 10 mph, with gusts as high as 20 mph.
Tuesday Night
Partly cloudy, with a low around 40. East wind around 5 mph becoming calm.
Wednesday
Cloudy, with a high near 64. South wind around 5 mph becoming east in the afternoon.
Wednesday Night
A chance of showers, with thunderstorms also possible after midnight. Cloudy, with a low around 50. Light east northeast wind becoming north 5 to 10 mph after midnight. Chance of precipitation is 40%.
Thursday
A chance of showers and thunderstorms. Cloudy, with a high near 58. Chance of precipitation is 50%.
Thursday Night
A 40 percent chance of showers. Cloudy, with a low around 44.
Friday
A 20 percent chance of showers. Mostly cloudy, with a high near 62.
Friday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 45.
Saturday
Mostly sunny, with a high near 70.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles WSW San Marcos TX
 29.86°N 97.97°W (Elev. 646 ft)
12:50 am CST Nov 30, 2025
2am CST Nov 30, 2025-6pm CST Dec 6, 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