Atmospheric River Bringing Heavy Rain to Southern California and Heavy Snow to the Sierra Nevadas

A strong atmospheric river will continue heavy rain over southern California through Friday. The heaviest rainfall is ongoing today in the Los Angeles Basin. Flash and urban flooding is possible. A prolonged heavy snowfall has begun over the Sierra Nevada Mountains and will continue through Friday. Travel will become increasingly difficult over the passes due to snow and strong winds. Read More >

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Mostly Cloudy

77°F

25°C

Humidity 62%
Wind Speed S 9 mph
Barometer 30.12 in (1019.3 mb)
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 25 Dec 2:56 pm CST
Extended Forecast for

Mountain City TX

  • Christmas Day

    Christmas Day: Mostly sunny, with a high near 79. South wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 79 °F

    Mostly Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 63. South southwest wind around 5 mph.

    Low: 63 °F

    Increasing
    Clouds

  • Friday

    Friday: Cloudy through mid morning, then gradual clearing, with a high near 81. South southwest wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 81 °F

    Gradual
    Clearing

  • Friday Night

    Friday Night: Increasing clouds, with a low around 64. South wind 5 to 10 mph.

    Low: 64 °F

    Increasing
    Clouds

  • Saturday

    Saturday: Partly sunny, with a high near 81. South wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 81 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 64. South wind around 10 mph, with gusts as high as 20 mph.

    Low: 64 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly cloudy, with a high near 79. South wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 79 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: A chance of showers, with thunderstorms also possible after midnight.  Mostly cloudy, with a low around 40. West southwest wind 5 to 10 mph becoming north 15 to 20 mph after midnight. Winds could gust as high as 30 mph.  Chance of precipitation is 30%.

    Low: 40 °F

    Chance
    Showers

  • Monday

    Monday: Cloudy, with a high near 48. North wind 15 to 20 mph, with gusts as high as 35 mph.

    High: 48 °F

    Cloudy

Detailed Forecast

Christmas Day
Mostly sunny, with a high near 79. South wind 5 to 10 mph, with gusts as high as 20 mph.
Tonight
Increasing clouds, with a low around 63. South southwest wind around 5 mph.
Friday
Cloudy through mid morning, then gradual clearing, with a high near 81. South southwest wind 5 to 10 mph, with gusts as high as 20 mph.
Friday Night
Increasing clouds, with a low around 64. South wind 5 to 10 mph.
Saturday
Partly sunny, with a high near 81. South wind 10 to 15 mph, with gusts as high as 20 mph.
Saturday Night
Mostly cloudy, with a low around 64. South wind around 10 mph, with gusts as high as 20 mph.
Sunday
Mostly cloudy, with a high near 79. South wind 5 to 10 mph, with gusts as high as 20 mph.
Sunday Night
A chance of showers, with thunderstorms also possible after midnight. Mostly cloudy, with a low around 40. West southwest wind 5 to 10 mph becoming north 15 to 20 mph after midnight. Winds could gust as high as 30 mph. Chance of precipitation is 30%.
Monday
Cloudy, with a high near 48. North wind 15 to 20 mph, with gusts as high as 35 mph.
Monday Night
Mostly cloudy, with a low around 33.
Tuesday
Mostly cloudy, with a high near 52.
Tuesday Night
Mostly cloudy, with a low around 33.
Wednesday
Mostly sunny, with a high near 61.
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ABOUT THIS FORECAST

 
Point Forecast:
Mountain City TX
 30.04°N 97.89°W (Elev. 837 ft)
12:44 pm CST Dec 25, 2025
3pm CST Dec 25, 2025-6pm CST Dec 31, 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