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.

Overcast

73°F

23°C

Humidity 90%
Wind Speed NE 9 mph
Barometer 30.08 in (1017.8 mb)
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Last update 4 Oct 7:56 am CDT
Extended Forecast for

2 Miles NNE San Marcos TX

  • Today

    Today: Patchy drizzle before 11am. Mostly cloudy, with a high near 81. North northeast wind around 15 mph, with gusts as high as 25 mph.

    High: 81 °F

    Patchy
    Drizzle then
    Mostly Cloudy

  • Tonight

    Tonight: Mostly cloudy, with a low around 69. North wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 69 °F

    Mostly Cloudy

  • Monday

    Monday: Sunny, with a high near 85. North northeast wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 85 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 65. North northeast wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 65 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 86. North northeast wind 5 to 10 mph.

    High: 86 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 64. Northeast wind around 5 mph becoming calm.

    Low: 64 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 89. Northeast wind around 5 mph.

    High: 89 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 65. East northeast wind around 5 mph becoming calm.

    Low: 65 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 88. Northeast wind around 5 mph.

    High: 88 °F

    Mostly Sunny

Detailed Forecast

Today
Patchy drizzle before 11am. Mostly cloudy, with a high near 81. North northeast wind around 15 mph, with gusts as high as 25 mph.
Tonight
Mostly cloudy, with a low around 69. North wind 10 to 15 mph, with gusts as high as 25 mph.
Monday
Sunny, with a high near 85. North northeast wind 10 to 15 mph, with gusts as high as 25 mph.
Monday Night
Mostly clear, with a low around 65. North northeast wind 5 to 10 mph, with gusts as high as 20 mph.
Tuesday
Sunny, with a high near 86. North northeast wind 5 to 10 mph.
Tuesday Night
Mostly clear, with a low around 64. Northeast wind around 5 mph becoming calm.
Wednesday
Sunny, with a high near 89. Northeast wind around 5 mph.
Wednesday Night
Mostly clear, with a low around 65. East northeast wind around 5 mph becoming calm.
Thursday
Mostly sunny, with a high near 88. Northeast wind around 5 mph.
Thursday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 66. Chance of precipitation is 20%.
Friday
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 86.
Friday Night
A 20 percent chance of showers. Partly cloudy, with a low around 65.
Saturday
A 20 percent chance of showers. Mostly sunny, with a high near 86.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles NNE San Marcos TX
 29.9°N 97.91°W (Elev. 640 ft)
Last Update:
8:18 am CDT Oct 4, 2026
Forecast Valid:
8am CDT Oct 4, 2026-6pm CDT Oct 10, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation