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

Atmospheric River Continues to Impact the Northwest U.S.; Gusty to High Winds in the Northeast U.S.

A strong atmospheric river will continue moderate to heavy rainfall with possible flooding, gusty to high winds, and mountain snows for parts of the Northwest U.S. into Thursday. Additional impacts are likely into Friday with a cold front. A fast-moving storm system will cross the Northeast U.S. Wednesday into Thursday with gusty to high winds and areas of rain and high elevation snow showers. Read More >

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Fair

65°F

18°C

Humidity 51%
Wind Speed SE 5 mph
Barometer 30.18 in (1021.6 mb)
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Last update 4 Nov 6:56 pm CST
Extended Forecast for

San Marcos TX

  • Tonight

    Tonight: Mostly clear, with a low around 55. South wind around 5 mph.

    Low: 55 °F

    Mostly Clear

  • Wednesday

    Wednesday: Patchy fog between 7am and 8am. Otherwise, sunny, with a high near 83. South southwest wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 83 °F

    Patchy Fog
    then Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 57. South wind around 5 mph.

    Low: 57 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 84. South southwest wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 84 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 61. South wind 5 to 10 mph.

    Low: 61 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 88. South southwest wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 88 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 57. South wind around 5 mph becoming west northwest after midnight.

    Low: 57 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 88. West northwest wind around 5 mph becoming south in the afternoon.

    High: 88 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 57. South wind 5 to 10 mph becoming north after midnight. Winds could gust as high as 20 mph.

    Low: 57 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 55. South wind around 5 mph.
Wednesday
Patchy fog between 7am and 8am. Otherwise, sunny, with a high near 83. South southwest wind 5 to 10 mph, with gusts as high as 20 mph.
Wednesday Night
Mostly clear, with a low around 57. South wind around 5 mph.
Thursday
Sunny, with a high near 84. South southwest wind 5 to 10 mph, with gusts as high as 20 mph.
Thursday Night
Mostly clear, with a low around 61. South wind 5 to 10 mph.
Friday
Sunny, with a high near 88. South southwest wind 5 to 10 mph, with gusts as high as 20 mph.
Friday Night
Clear, with a low around 57. South wind around 5 mph becoming west northwest after midnight.
Saturday
Sunny, with a high near 88. West northwest wind around 5 mph becoming south in the afternoon.
Saturday Night
Mostly clear, with a low around 57. South wind 5 to 10 mph becoming north after midnight. Winds could gust as high as 20 mph.
Sunday
Sunny, with a high near 72.
Sunday Night
Clear, with a low around 43.
Monday
Sunny, with a high near 65.
Monday Night
Clear, with a low around 40.
Veterans Day
Sunny, with a high near 72.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
San Marcos TX
 29.88°N 97.94°W (Elev. 577 ft)
Last Update:
6:42 pm CST Nov 4, 2025
Forecast Valid:
7pm CST Nov 4, 2025-6pm CST Nov 11, 2025
 
Forecast Discussion
 
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Additional Resources

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