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.

A Few Clouds

99°F

37°C

Humidity 34%
Wind Speed Vrbl 7 mph
Barometer 29.85 in (1009.6 mb)
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Heat Index103°F (39°C)
Last update 5 Sep 4:56 pm CDT
Extended Forecast for

Kyle TX

  • Tonight

    Tonight: Partly cloudy, with a low around 74. South southeast wind around 5 mph becoming calm in the evening.

    Low: 74 °F

    Partly Cloudy

  • Sunday

    Sunday: A slight chance of showers, then a chance of showers and thunderstorms after 10am. Mostly sunny, with a high near 96. Heat index values as high as 103. Calm wind becoming east around 5 mph. Chance of precipitation is 30%.

    High: 96 °F

    Chance
    T-storms

  • Sunday Night

    Sunday Night: A 20 percent chance of showers after 4am. Mostly clear, with a low around 74. East wind around 5 mph becoming calm in the evening.

    Low: 74 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

  • Labor Day

    Labor Day: A 20 percent chance of showers before 7am. Sunny, with a high near 97. Heat index values as high as 104. Calm wind becoming southeast around 5 mph in the afternoon.

    High: 97 °F

    Slight Chance
    Showers then
    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 74. South wind around 5 mph.

    Low: 74 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 98. Calm wind becoming south southeast around 5 mph in the afternoon.

    High: 98 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 74. Southeast wind 5 to 10 mph becoming light south after midnight.

    Low: 74 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 97. Calm wind becoming south southeast around 5 mph in the afternoon.

    High: 97 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 74. South wind around 5 mph.

    Low: 74 °F

    Partly Cloudy

Detailed Forecast

Tonight
Partly cloudy, with a low around 74. South southeast wind around 5 mph becoming calm in the evening.
Sunday
A slight chance of showers, then a chance of showers and thunderstorms after 10am. Mostly sunny, with a high near 96. Heat index values as high as 103. Calm wind becoming east around 5 mph. Chance of precipitation is 30%.
Sunday Night
A 20 percent chance of showers after 4am. Mostly clear, with a low around 74. East wind around 5 mph becoming calm in the evening.
Labor Day
A 20 percent chance of showers before 7am. Sunny, with a high near 97. Heat index values as high as 104. Calm wind becoming southeast around 5 mph in the afternoon.
Monday Night
Mostly clear, with a low around 74. South wind around 5 mph.
Tuesday
Sunny, with a high near 98. Calm wind becoming south southeast around 5 mph in the afternoon.
Tuesday Night
Mostly clear, with a low around 74. Southeast wind 5 to 10 mph becoming light south after midnight.
Wednesday
Mostly sunny, with a high near 97. Calm wind becoming south southeast around 5 mph in the afternoon.
Wednesday Night
Partly cloudy, with a low around 74. South wind around 5 mph.
Thursday
Mostly sunny, with a high near 97.
Thursday Night
Partly cloudy, with a low around 74.
Friday
Mostly sunny, with a high near 98.
Friday Night
Partly cloudy, with a low around 74.
Saturday
Mostly sunny, with a high near 98.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Kyle TX
 30.02°N 97.89°W (Elev. 797 ft)
Last Update:
2:42 pm CDT Sep 5, 2026
Forecast Valid:
5pm CDT Sep 5, 2026-6pm CDT Sep 12, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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