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

Hazardous Weather Conditions

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Partly Cloudy

93°F

34°C

Humidity 52%
Wind Speed S 8 mph
Barometer 29.98 in (1014.5 mb)
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index102°F (39°C)
Last update 26 Jun 3:56 pm CDT
Extended Forecast for

6 Miles NW San Marcos TX

  • This Afternoon

    This Afternoon: A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 91. South southeast wind around 10 mph, with gusts as high as 20 mph.

    High: 91 °F

    Chance
    T-storms

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms before 7pm. Mostly clear, with a low around 71. Southeast wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 71 °F

    Chance
    T-storms then
    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 93. Light south wind becoming south southeast 5 to 10 mph in the morning.

    High: 93 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 70. Southeast wind 5 to 10 mph.

    Low: 70 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 94. Light south wind becoming south southeast 5 to 10 mph in the morning. Winds could gust as high as 20 mph.

    High: 94 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 73. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 73 °F

    Partly Cloudy

  • Sunday

    Sunday: A 20 percent chance of showers and thunderstorms after 1pm. Widespread haze after 1pm. Mostly sunny, with a high near 92. Light south wind becoming south southeast 5 to 10 mph in the morning. Winds could gust as high as 20 mph.

    High: 92 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Sunday Night

    Sunday Night: Widespread haze. Partly cloudy, with a low around 73. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 73 °F

    Haze

  • Monday

    Monday: Widespread haze. Mostly sunny, with a high near 94. South wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 94 °F

    Haze

Detailed Forecast

This Afternoon
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 91. South southeast wind around 10 mph, with gusts as high as 20 mph.
Tonight
A 30 percent chance of showers and thunderstorms before 7pm. Mostly clear, with a low around 71. Southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Friday
Sunny, with a high near 93. Light south wind becoming south southeast 5 to 10 mph in the morning.
Friday Night
Mostly clear, with a low around 70. Southeast wind 5 to 10 mph.
Saturday
Mostly sunny, with a high near 94. Light south wind becoming south southeast 5 to 10 mph in the morning. Winds could gust as high as 20 mph.
Saturday Night
Partly cloudy, with a low around 73. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Sunday
A 20 percent chance of showers and thunderstorms after 1pm. Widespread haze after 1pm. Mostly sunny, with a high near 92. Light south wind becoming south southeast 5 to 10 mph in the morning. Winds could gust as high as 20 mph.
Sunday Night
Widespread haze. Partly cloudy, with a low around 73. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Monday
Widespread haze. Mostly sunny, with a high near 94. South wind 5 to 10 mph, with gusts as high as 20 mph.
Monday Night
Widespread haze. Partly cloudy, with a low around 71.
Tuesday
Widespread haze. Mostly sunny, with a high near 95.
Tuesday Night
Widespread haze. Partly cloudy, with a low around 72.
Wednesday
Widespread haze. Partly sunny, with a high near 95.
Wednesday Night
Partly cloudy, with a low around 73.
Thursday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 95.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
6 Miles NW San Marcos TX
 29.95°N 98.02°W (Elev. 935 ft)
Last Update:
3:32 pm CDT Jun 26, 2025
Forecast Valid:
4pm CDT Jun 26, 2025-6pm CDT Jul 3, 2025
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

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Chance of Precipitation