National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Significant and Catastrophic Flooding in the Pacific Northwest; Very Cold Temperatures in the Northern Plains

The atmospheric river over the Pacific Northwest will begin to subside today, but lingering rainfall will exacerbate ongoing catastrophic major river flooding, and landslides will continue across portions of western Washington and northwest Oregon for several days. Arctic air will plummet southward into the Northern Plains today, bringing cold air in the single digits to the region by Friday. Read More >

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Fair

52°F

11°C

Humidity 40%
Wind Speed N 5 mph
Barometer 30.19 in (1022.1 mb)
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Wind Chill51°F (11°C)
Last update 11 Dec 8:56 am CST
Extended Forecast for

2 Miles WNW San Marcos TX

  • Today

    Today: Sunny, with a high near 68. Calm wind becoming south around 5 mph in the afternoon.

    High: 68 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 49. Southwest wind around 5 mph.

    Low: 49 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 76. Southwest wind around 5 mph becoming south southeast in the afternoon.

    High: 76 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Increasing clouds, with a low around 55. Calm wind becoming north around 5 mph after midnight.

    Low: 55 °F

    Increasing
    Clouds

  • Saturday

    Saturday: Partly sunny, with a high near 72. North wind around 5 mph becoming south southeast in the afternoon.

    High: 72 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 51. East southeast wind 5 to 10 mph becoming north northeast after midnight.

    Low: 51 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 60. North northeast wind 10 to 15 mph, with gusts as high as 30 mph.

    High: 60 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 41. North northeast wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 41 °F

    Partly Cloudy

  • Monday

    Monday: Mostly cloudy, with a high near 60. Northeast wind around 5 mph becoming south southeast in the afternoon.

    High: 60 °F

    Mostly Cloudy

Detailed Forecast

Today
Sunny, with a high near 68. Calm wind becoming south around 5 mph in the afternoon.
Tonight
Mostly clear, with a low around 49. Southwest wind around 5 mph.
Friday
Mostly sunny, with a high near 76. Southwest wind around 5 mph becoming south southeast in the afternoon.
Friday Night
Increasing clouds, with a low around 55. Calm wind becoming north around 5 mph after midnight.
Saturday
Partly sunny, with a high near 72. North wind around 5 mph becoming south southeast in the afternoon.
Saturday Night
Partly cloudy, with a low around 51. East southeast wind 5 to 10 mph becoming north northeast after midnight.
Sunday
Partly sunny, with a high near 60. North northeast wind 10 to 15 mph, with gusts as high as 30 mph.
Sunday Night
Partly cloudy, with a low around 41. North northeast wind 5 to 10 mph, with gusts as high as 20 mph.
Monday
Mostly cloudy, with a high near 60. Northeast wind around 5 mph becoming south southeast in the afternoon.
Monday Night
Mostly cloudy, with a low around 48.
Tuesday
Mostly cloudy, with a high near 66.
Tuesday Night
Mostly cloudy, with a low around 56.
Wednesday
Mostly sunny, with a high near 75.
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles WNW San Marcos TX
 29.88°N 97.94°W (Elev. 577 ft)
Last Update:
6:42 am CST Dec 11, 2025
Forecast Valid:
9am CST Dec 11, 2025-6pm CST Dec 17, 2025
 
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Additional Resources

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