Strong Atmospheric River Bringing Heavy Rain to the Pacific Northwest; Areas of Snow in the North-Central and Eastern U.S.

A strong atmospheric river will bring prolonged heavy rainfall along with gusty winds to the Pacific Northwest through much of this week. The heavy rainfall may lead to widespread urban and river flooding. Accumulating snow is expected over parts of the central Appalachians and Mid-Atlantic today as well as the Upper Midwest and the Upper Great Lakes this evening into Tuesday. Read More >

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Fair

45°F

7°C

Humidity 66%
Wind Speed NE 12 mph
Barometer 30.36 in (1027.8 mb)
Dewpoint 34°F (1°C)
Visibility 10.00 mi
Wind Chill39°F (4°C)
Last update 8 Dec 8:56 am CST
Extended Forecast for

3 Miles WNW San Marcos TX

  • Today

    Today: Sunny, with a high near 62. North northeast wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 62 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 34. East northeast wind around 5 mph becoming calm.

    Low: 34 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 66. Light west southwest wind becoming south southwest 5 to 10 mph in the morning. Winds could gust as high as 20 mph.

    High: 66 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 45. Southwest wind around 5 mph.

    Low: 45 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 75. Southwest wind 5 to 10 mph becoming east southeast in the afternoon.

    High: 75 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 45. East wind around 5 mph becoming north after midnight.

    Low: 45 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 75. North wind around 5 mph becoming south in the afternoon.

    High: 75 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 51. South wind around 5 mph becoming northwest after midnight.

    Low: 51 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 71. North northeast wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 71 °F

    Mostly Sunny

Detailed Forecast

Today
Sunny, with a high near 62. North northeast wind 5 to 10 mph, with gusts as high as 20 mph.
Tonight
Clear, with a low around 34. East northeast wind around 5 mph becoming calm.
Tuesday
Sunny, with a high near 66. Light west southwest wind becoming south southwest 5 to 10 mph in the morning. Winds could gust as high as 20 mph.
Tuesday Night
Clear, with a low around 45. Southwest wind around 5 mph.
Wednesday
Sunny, with a high near 75. Southwest wind 5 to 10 mph becoming east southeast in the afternoon.
Wednesday Night
Mostly clear, with a low around 45. East wind around 5 mph becoming north after midnight.
Thursday
Sunny, with a high near 75. North wind around 5 mph becoming south in the afternoon.
Thursday Night
Mostly clear, with a low around 51. South wind around 5 mph becoming northwest after midnight.
Friday
Mostly sunny, with a high near 71. North northeast wind 5 to 10 mph, with gusts as high as 20 mph.
Friday Night
Partly cloudy, with a low around 46.
Saturday
Partly sunny, with a high near 62.
Saturday Night
Mostly cloudy, with a low around 48.
Sunday
Mostly cloudy, with a high near 61.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles WNW San Marcos TX
 29.9°N 97.99°W (Elev. 850 ft)
6:42 am CST Dec 8, 2025
9am CST Dec 8, 2025-6pm CST Dec 14, 2025
 
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Additional Resources

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Hourly Weather Forecast

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