Tracking Atmospheric River in the Northwest U.S. and Clipper with Winter Weather in the Northeast U.S.

A prolonged atmospheric river will continue to bring gusty winds, heavy rainfall which may lead to urban and river flooding with possible landslides, and heavy inter-mountain snow over the Pacific Northwest into the northern Rockies through Thursday. A clipper will cross the Great Lakes and Northeast U.S. into Thursday with areas of moderate to heavy snow and mixed wintry precipitation. Read More >

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Fair

54°F

12°C

Humidity 45%
Wind Speed N 9 mph
Barometer 30.15 in (1020.7 mb)
Dewpoint 33°F (1°C)
Visibility 10.00 mi
Wind Chill51°F (11°C)
Last update 10 Dec 8:56 pm CST
Extended Forecast for

6 Miles NW San Marcos TX

  • Tonight

    Tonight: Clear, with a low around 40. North wind 5 to 10 mph.

    Low: 40 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 68. North northwest wind around 5 mph becoming south southeast in the afternoon.

    High: 68 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 48. South southwest wind around 5 mph.

    Low: 48 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 75. Southwest wind 5 to 10 mph.

    High: 75 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 54. Calm wind becoming north around 5 mph after midnight.

    Low: 54 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 74. North wind around 5 mph becoming south southeast in the afternoon.

    High: 74 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 54. Calm wind becoming north northeast around 5 mph after midnight.

    Low: 54 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly cloudy, with a high near 61. North northeast wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 61 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 43. North northeast wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 43 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Clear, with a low around 40. North wind 5 to 10 mph.
Thursday
Sunny, with a high near 68. North northwest wind around 5 mph becoming south southeast in the afternoon.
Thursday Night
Mostly clear, with a low around 48. South southwest wind around 5 mph.
Friday
Mostly sunny, with a high near 75. Southwest wind 5 to 10 mph.
Friday Night
Partly cloudy, with a low around 54. Calm wind becoming north around 5 mph after midnight.
Saturday
Partly sunny, with a high near 74. North wind around 5 mph becoming south southeast in the afternoon.
Saturday Night
Partly cloudy, with a low around 54. Calm wind becoming north northeast around 5 mph after midnight.
Sunday
Mostly cloudy, with a high near 61. North northeast wind 5 to 10 mph, with gusts as high as 20 mph.
Sunday Night
Mostly cloudy, with a low around 43. North northeast wind 5 to 10 mph, with gusts as high as 20 mph.
Monday
Mostly cloudy, with a high near 61.
Monday Night
Cloudy, with a low around 50.
Tuesday
A 20 percent chance of showers. Mostly cloudy, with a high near 66.
Tuesday Night
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 54.
Wednesday
Partly sunny, with a high near 73.
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ABOUT THIS FORECAST

 
Point Forecast:
6 Miles NW San Marcos TX
 29.95°N 98.02°W (Elev. 935 ft)
8:44 pm CST Dec 10, 2025
9pm CST Dec 10, 2025-6pm CST Dec 17, 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