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

80°F

27°C

Humidity 90%
Wind Speed S 10 mph
Barometer 30.12 in (1018.9 mb)
Dewpoint 77°F (25°C)
Visibility 10.00 mi
Heat Index86°F (30°C)
Last update 15 Aug 4:56 am CDT
Extended Forecast for

Kyle TX

  • Today

    Today: Mostly sunny and hot, with a high near 99. Heat index values as high as 105. South wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 99 °F

    Hot

  • Tonight

    Tonight: Increasing clouds, with a low around 74. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 74 °F

    Increasing
    Clouds

  • Sunday

    Sunday: Mostly cloudy through mid morning, then gradual clearing and hot, with a high near 99. South wind around 5 mph.

    High: 99 °F

    Hot

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 74. South southeast wind 5 to 10 mph.

    Low: 74 °F

    Mostly Clear

  • Monday

    Monday: Sunny and hot, with a high near 99. Southwest wind around 5 mph becoming south southeast in the afternoon.

    High: 99 °F

    Hot

  • Monday Night

    Monday Night: Mostly clear, with a low around 75. South southeast wind around 5 mph.

    Low: 75 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny and hot, with a high near 99. South wind around 5 mph.

    High: 99 °F

    Hot

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 76. South wind 5 to 10 mph.

    Low: 76 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 100. South southwest wind 5 to 10 mph.

    High: 100 °F

    Hot

Detailed Forecast

Today
Mostly sunny and hot, with a high near 99. Heat index values as high as 105. South wind 5 to 10 mph, with gusts as high as 20 mph.
Tonight
Increasing clouds, with a low around 74. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Sunday
Mostly cloudy through mid morning, then gradual clearing and hot, with a high near 99. South wind around 5 mph.
Sunday Night
Mostly clear, with a low around 74. South southeast wind 5 to 10 mph.
Monday
Sunny and hot, with a high near 99. Southwest wind around 5 mph becoming south southeast in the afternoon.
Monday Night
Mostly clear, with a low around 75. South southeast wind around 5 mph.
Tuesday
Sunny and hot, with a high near 99. South wind around 5 mph.
Tuesday Night
Mostly clear, with a low around 76. South wind 5 to 10 mph.
Wednesday
Sunny and hot, with a high near 100. South southwest wind 5 to 10 mph.
Wednesday Night
Mostly clear, with a low around 75.
Thursday
Mostly sunny and hot, with a high near 100.
Thursday Night
Mostly clear, with a low around 75.
Friday
Mostly sunny and hot, with a high near 100.
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ABOUT THIS FORECAST

 
Point Forecast:
Kyle TX
 29.99°N 97.89°W (Elev. 791 ft)
Last Update:
2:42 am CDT Aug 15, 2026
Forecast Valid:
5am CDT Aug 15, 2026-6pm CDT Aug 21, 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