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

Storm Systems to Impact the Central and Eastern U.S. Through the Weekend

Two storm systems will track through the central and eastern U.S. today through this weekend with areas of gusty winds, rain and heavy snow. Severe thunderstorms and heavy to excessive rainfall is forecast today from the Lower Mississippi River Valley to the Tennessee Valley. Damaging winds, a few tornadoes, and areas of flooding are possible. Read More >

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Fair

44°F

7°C

Humidity 34%
Wind Speed N 7 mph
Barometer 30.60 in (1036.1 mb)
Dewpoint 17°F (-8°C)
Visibility 10.00 mi
Wind Chill40°F (4°C)
Last update 11 Jan 8:56 am CST
Extended Forecast for

2 Miles E San Marcos TX

  • Today

    Today: Partly sunny, with a high near 63. North northeast wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 63 °F

    Partly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 40. Northeast wind around 5 mph becoming calm.

    Low: 40 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly cloudy, with a high near 61. Calm wind.

    High: 61 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 44. Calm wind.

    Low: 44 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A 20 percent chance of showers. Mostly cloudy, with a high near 61. West southwest wind around 5 mph.

    High: 61 °F

    Slight Chance
    Showers

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 42. West southwest wind around 5 mph.

    Low: 42 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 71. West wind 5 to 15 mph becoming north in the afternoon. Winds could gust as high as 20 mph.

    High: 71 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 39. North wind 5 to 10 mph.

    Low: 39 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 66. North northwest wind around 5 mph becoming south in the afternoon.

    High: 66 °F

    Sunny

Detailed Forecast

Today
Partly sunny, with a high near 63. North northeast wind 5 to 10 mph, with gusts as high as 20 mph.
Tonight
Mostly cloudy, with a low around 40. Northeast wind around 5 mph becoming calm.
Monday
Mostly cloudy, with a high near 61. Calm wind.
Monday Night
Mostly cloudy, with a low around 44. Calm wind.
Tuesday
A 20 percent chance of showers. Mostly cloudy, with a high near 61. West southwest wind around 5 mph.
Tuesday Night
Mostly clear, with a low around 42. West southwest wind around 5 mph.
Wednesday
Sunny, with a high near 71. West wind 5 to 15 mph becoming north in the afternoon. Winds could gust as high as 20 mph.
Wednesday Night
Clear, with a low around 39. North wind 5 to 10 mph.
Thursday
Sunny, with a high near 66. North northwest wind around 5 mph becoming south in the afternoon.
Thursday Night
Clear, with a low around 41.
Friday
Sunny, with a high near 69.
Friday Night
Partly cloudy, with a low around 42.
Saturday
Mostly cloudy, with a high near 55.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles E San Marcos TX
 29.88°N 97.91°W (Elev. 597 ft)
Last Update:
9:18 am CST Jan 11, 2026
Forecast Valid:
9am CST Jan 11, 2026-6pm CST Jan 17, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation