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

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Fair

67°F

19°C

Humidity 71%
Wind Speed N 7 mph
Barometer 29.99 in (1014.9 mb)
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Last update 6 Oct 11:56 pm CDT
Extended Forecast for

5 Miles SW San Marcos TX

  • Overnight

    Overnight: Clear, with a low around 65. North wind around 5 mph.

    Low: 65 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 88. North northeast wind around 5 mph.

    High: 88 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 65. North wind around 5 mph.

    Low: 65 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 87. Northeast wind around 5 mph.

    High: 87 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 68. Northeast wind around 5 mph becoming calm in the evening.

    Low: 68 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 86. North wind 5 to 10 mph becoming east northeast in the afternoon.

    High: 86 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 66. East northeast wind around 5 mph becoming calm in the evening.

    Low: 66 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 86. Northeast wind around 5 mph.

    High: 86 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 65. Calm wind.

    Low: 65 °F

    Mostly Clear

Detailed Forecast

Overnight
Clear, with a low around 65. North wind around 5 mph.
Wednesday
Sunny, with a high near 88. North northeast wind around 5 mph.
Wednesday Night
Clear, with a low around 65. North wind around 5 mph.
Thursday
Sunny, with a high near 87. Northeast wind around 5 mph.
Thursday Night
Mostly clear, with a low around 68. Northeast wind around 5 mph becoming calm in the evening.
Friday
Sunny, with a high near 86. North wind 5 to 10 mph becoming east northeast in the afternoon.
Friday Night
Mostly clear, with a low around 66. East northeast wind around 5 mph becoming calm in the evening.
Saturday
Sunny, with a high near 86. Northeast wind around 5 mph.
Saturday Night
Mostly clear, with a low around 65. Calm wind.
Sunday
Mostly sunny, with a high near 87.
Sunday Night
Partly cloudy, with a low around 70.
Columbus Day
A 30 percent chance of showers. Partly sunny, with a high near 87.
Monday Night
Mostly cloudy, with a low around 73.
Tuesday
A 20 percent chance of showers and thunderstorms. Partly 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 6, 2026
Forecast Valid:
12am CDT Oct 7, 2026-6pm CDT Oct 13, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation