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

Cold Front Moving Through the Northeast U.S. Monday; Atmospheric River to Impact the Pacific Northwest Midweek

A cold front will cross the Great Lakes and Northeast U.S. through Monday with gusty winds and areas of rain showers. A strong atmospheric river is expected to move into the Pacific Northwest by midweek bringing a threat for moderate to heavy rainfall, gusty winds, and mountain snows for parts of Washington, Oregon, northern California, and the Sierra Nevada. Read More >

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Fair

73°F

23°C

Humidity 35%
Wind Speed SW 5 mph
Barometer 30.22 in (1023.1 mb)
Dewpoint 44°F (7°C)
Visibility 10.00 mi
Last update 2 Nov 4:56 pm CST
Extended Forecast for

San Marcos TX

  • Tonight

    Tonight: Clear, with a low around 48. East wind around 5 mph becoming calm.

    Low: 48 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 77. Calm wind becoming south around 5 mph in the morning.

    High: 77 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 50. Southeast wind around 5 mph becoming calm.

    Low: 50 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 79. Light south southwest wind becoming south 5 to 10 mph in the morning. Winds could gust as high as 20 mph.

    High: 79 °F

    Sunny

  • Tuesday Night

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

    Low: 55 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 82. South wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 82 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 58. South wind around 5 mph.

    Low: 58 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 84. South 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

Detailed Forecast

Tonight
Clear, with a low around 48. East wind around 5 mph becoming calm.
Monday
Sunny, with a high near 77. Calm wind becoming south around 5 mph in the morning.
Monday Night
Clear, with a low around 50. Southeast wind around 5 mph becoming calm.
Tuesday
Sunny, with a high near 79. Light south southwest wind becoming south 5 to 10 mph in the morning. Winds could gust as high as 20 mph.
Tuesday Night
Mostly clear, with a low around 55. South wind around 5 mph.
Wednesday
Sunny, with a high near 82. South wind 5 to 10 mph, with gusts as high as 20 mph.
Wednesday Night
Mostly clear, with a low around 58. South wind around 5 mph.
Thursday
Sunny, with a high near 84. South 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 86.
Friday Night
Mostly clear, with a low around 58.
Saturday
Sunny, with a high near 85.
Saturday Night
Mostly clear, with a low around 60.
Sunday
Sunny, with a high near 81.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
San Marcos TX
 29.88°N 97.94°W (Elev. 577 ft)
Last Update:
5:02 pm CST Nov 2, 2025
Forecast Valid:
5pm CST Nov 2, 2025-6pm CST Nov 9, 2025
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation