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

Tracking Storm System Across the Eastern U.S.

A storm system will continue to produce widespread showers and thunderstorms as it progresses eastward across the central U.S. into the Northeast through the weekend. There are risks of severe thunderstorms and excessive rainfall on Saturday from the Ozarks into the mid-Mississippi River Valley with potential for damaging winds, large hail, tornadoes, and flash flooding. Read More >

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Overcast

82°F

28°C

Humidity 55%
Wind Speed S 12 mph
Barometer 29.90 in (1011.7 mb)
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Heat Index84°F (29°C)
Last update 18 Oct 10:56 pm CDT
Extended Forecast for

5 Miles SW San Marcos TX

  • Tonight

    Tonight: Clear, with a low around 64. North wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 64 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 85. North northeast wind 10 to 20 mph, with gusts as high as 30 mph.

    High: 85 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 53. Northeast wind around 5 mph becoming calm in the evening.

    Low: 53 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 92. South southwest wind 5 to 10 mph, with gusts as high as 25 mph.

    High: 92 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 64. South wind 5 to 10 mph.

    Low: 64 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 89. West wind 5 to 10 mph becoming north northeast in the afternoon. Winds could gust as high as 20 mph.

    High: 89 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 60. North northeast wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 60 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 87. North northeast wind 5 to 10 mph becoming east southeast in the afternoon.

    High: 87 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 64. South southeast wind around 5 mph.

    Low: 64 °F

    Mostly Clear

Detailed Forecast

Tonight
Clear, with a low around 64. North wind 5 to 10 mph, with gusts as high as 20 mph.
Sunday
Sunny, with a high near 85. North northeast wind 10 to 20 mph, with gusts as high as 30 mph.
Sunday Night
Clear, with a low around 53. Northeast wind around 5 mph becoming calm in the evening.
Monday
Sunny, with a high near 92. South southwest wind 5 to 10 mph, with gusts as high as 25 mph.
Monday Night
Mostly clear, with a low around 64. South wind 5 to 10 mph.
Tuesday
Sunny, with a high near 89. West wind 5 to 10 mph becoming north northeast in the afternoon. Winds could gust as high as 20 mph.
Tuesday Night
Mostly clear, with a low around 60. North northeast wind 5 to 10 mph, with gusts as high as 20 mph.
Wednesday
Sunny, with a high near 87. North northeast wind 5 to 10 mph becoming east southeast in the afternoon.
Wednesday Night
Mostly clear, with a low around 64. South southeast wind around 5 mph.
Thursday
Mostly sunny, with a high near 89.
Thursday Night
Partly cloudy, with a low around 66.
Friday
Mostly sunny, with a high near 88.
Friday Night
A 20 percent chance of showers. Mostly clear, with a low around 62.
Saturday
Sunny, with a high near 87.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles SW San Marcos TX
 29.83°N 97.99°W (Elev. 676 ft)
Last Update:
11:32 pm CDT Oct 18, 2025
Forecast Valid:
11pm CDT Oct 18, 2025-6pm CDT Oct 25, 2025
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation