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

Tracking Weekend Storm Impacts

A storm and trailing cold front will continue to slowly move through the Gulf Coast and Southeast U.S. through this weekend with widespread rain showers and isolated thunderstorms. A fast-moving clipper storm may bring several inches of snow to the north-central Plains, Midwest, eastern Great Lakes, and Northeast regions this weekend. 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 43%
Wind Speed SW 8 mph
Barometer 29.90 in (1012.2 mb)
Dewpoint 49°F (9°C)
Visibility 10.00 mi
Last update 6 Dec 12:56 pm CST
Extended Forecast for

San Marcos TX

  • This Afternoon

    This Afternoon: Sunny, with a high near 74. South southwest wind around 5 mph.

    High: 74 °F

    Sunny

  • Tonight

    Tonight: Patchy fog after 4am. Otherwise, mostly clear, with a low around 54. South southwest wind around 5 mph.

    Low: 54 °F

    Clear then
    Patchy Fog

  • Sunday

    Sunday: Patchy fog before 8am. Otherwise, sunny, with a high near 72. West southwest wind 5 to 15 mph becoming north in the afternoon. Winds could gust as high as 25 mph.

    High: 72 °F

    Patchy Fog
    then Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 41. North wind around 10 mph, with gusts as high as 25 mph.

    Low: 41 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 62. North wind 5 to 10 mph becoming east northeast in the afternoon.

    High: 62 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 37. East wind around 5 mph becoming calm.

    Low: 37 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 67. Light south southwest wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 20 mph.

    High: 67 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 49. South southwest wind 5 to 10 mph.

    Low: 49 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 77. Southwest wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 77 °F

    Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 74. South southwest wind around 5 mph.
Tonight
Patchy fog after 4am. Otherwise, mostly clear, with a low around 54. South southwest wind around 5 mph.
Sunday
Patchy fog before 8am. Otherwise, sunny, with a high near 72. West southwest wind 5 to 15 mph becoming north in the afternoon. Winds could gust as high as 25 mph.
Sunday Night
Clear, with a low around 41. North wind around 10 mph, with gusts as high as 25 mph.
Monday
Sunny, with a high near 62. North wind 5 to 10 mph becoming east northeast in the afternoon.
Monday Night
Clear, with a low around 37. East wind around 5 mph becoming calm.
Tuesday
Sunny, with a high near 67. Light south southwest wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 20 mph.
Tuesday Night
Clear, with a low around 49. South southwest wind 5 to 10 mph.
Wednesday
Sunny, with a high near 77. Southwest wind 5 to 10 mph, with gusts as high as 20 mph.
Wednesday Night
Mostly clear, with a low around 50.
Thursday
Sunny, with a high near 78.
Thursday Night
Mostly clear, with a low around 48.
Friday
Mostly sunny, with a high near 66.
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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:
1:06 pm CST Dec 6, 2025
Forecast Valid:
1pm CST Dec 6, 2025-6pm CST Dec 12, 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