Severe Thunderstorms and Heavy Rain in the Southern U.S.; Snow in the Northern Rockies and Northern Plains

A storm system will shift from eastern Texas into the lower Mississippi Valley today with additional threats of severe thunderstorms and heavy to excessive rainfall which may bring flooding. In the northern U.S., a storm will bring heavy snow and gusty winds over parts of the northern Rockies, northern Plains, and Upper Midwest today into Wednesday. Read More >

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Fog/Mist

71°F

22°C

Humidity 73%
Wind Speed SW 3 mph
Barometer 29.85 in (1010.3 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Last update 24 Nov 3:56 pm CST
Extended Forecast for

2 Miles W San Marcos Municipal Airport TX

  • This Afternoon

    This Afternoon: A 50 percent chance of showers and thunderstorms.  Partly sunny, with a steady temperature around 74. West wind 5 to 10 mph, with gusts as high as 20 mph.  New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 74 °F

    Chance
    T-storms

  • Tonight

    Tonight: Mostly clear, with a low around 52. West northwest wind around 5 mph becoming calm  in the evening.

    Low: 52 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 80. North wind around 5 mph.

    High: 80 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 50. North northeast wind 5 to 15 mph, with gusts as high as 25 mph.

    Low: 50 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 65. North northeast wind 10 to 15 mph, with gusts as high as 30 mph.

    High: 65 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 40. North northeast wind around 5 mph becoming calm.

    Low: 40 °F

    Mostly Clear

  • Thanksgiving Day

    Thanksgiving Day: Sunny, with a high near 67. East northeast wind around 5 mph.

    High: 67 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 45. East northeast wind around 5 mph becoming calm  in the evening.

    Low: 45 °F

    Partly Cloudy

  • Friday

    Friday: Mostly cloudy, with a high near 70. South southeast wind 5 to 10 mph, with gusts as high as 25 mph.

    High: 70 °F

    Mostly Cloudy

Detailed Forecast

This Afternoon
A 50 percent chance of showers and thunderstorms. Partly sunny, with a steady temperature around 74. West wind 5 to 10 mph, with gusts as high as 20 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight
Mostly clear, with a low around 52. West northwest wind around 5 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 80. North wind around 5 mph.
Tuesday Night
Mostly clear, with a low around 50. North northeast wind 5 to 15 mph, with gusts as high as 25 mph.
Wednesday
Sunny, with a high near 65. North northeast wind 10 to 15 mph, with gusts as high as 30 mph.
Wednesday Night
Mostly clear, with a low around 40. North northeast wind around 5 mph becoming calm.
Thanksgiving Day
Sunny, with a high near 67. East northeast wind around 5 mph.
Thursday Night
Partly cloudy, with a low around 45. East northeast wind around 5 mph becoming calm in the evening.
Friday
Mostly cloudy, with a high near 70. South southeast wind 5 to 10 mph, with gusts as high as 25 mph.
Friday Night
A 30 percent chance of showers, mainly after midnight. Cloudy, with a low around 60.
Saturday
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 75.
Saturday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 54.
Sunday
A 30 percent chance of showers and thunderstorms. Cloudy, with a high near 69.
Sunday Night
A 30 percent chance of showers and thunderstorms. Cloudy, with a low around 52.
Monday
A chance of showers. Cloudy, with a high near 65.
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles W San Marcos Municipal Airport TX
 29.9°N 97.91°W (Elev. 640 ft)
4:32 pm CST Nov 24, 2025
4pm CST Nov 24, 2025-6pm CST Dec 1, 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