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

85°F

29°C

Humidity 68%
Wind Speed S 13 mph
Barometer 29.99 in (1014.7 mb)
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index92°F (33°C)
Last update 30 Aug 10:56 pm CDT
Extended Forecast for

Kyle TX

  • Tonight

    Tonight: Mostly clear, with a low around 75. South wind 5 to 10 mph.

    Low: 75 °F

    Mostly Clear

  • Monday

    Monday: Partly sunny, then gradually becoming sunny and hot, with a high near 99. Heat index values as high as 104. South southwest wind around 5 mph.

    High: 99 °F

    Hot

  • Monday Night

    Monday Night: Mostly clear, with a low around 75. Southeast wind 5 to 10 mph becoming south southwest after midnight.

    Low: 75 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny and hot, with a high near 99. Heat index values as high as 105. Calm wind becoming south southeast around 5 mph in the afternoon.

    High: 99 °F

    Hot

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 75. Southeast wind around 5 mph.

    Low: 75 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 98. South wind around 5 mph.

    High: 98 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 75. East southeast wind 5 to 10 mph becoming south after midnight.

    Low: 75 °F

    Partly Cloudy

  • Thursday

    Thursday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 98. South wind around 5 mph.

    High: 98 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 75. South wind 5 to 10 mph.

    Low: 75 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 75. South wind 5 to 10 mph.
Monday
Partly sunny, then gradually becoming sunny and hot, with a high near 99. Heat index values as high as 104. South southwest wind around 5 mph.
Monday Night
Mostly clear, with a low around 75. Southeast wind 5 to 10 mph becoming south southwest after midnight.
Tuesday
Sunny and hot, with a high near 99. Heat index values as high as 105. Calm wind becoming south southeast around 5 mph in the afternoon.
Tuesday Night
Partly cloudy, with a low around 75. Southeast wind around 5 mph.
Wednesday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 98. South wind around 5 mph.
Wednesday Night
Partly cloudy, with a low around 75. East southeast wind 5 to 10 mph becoming south after midnight.
Thursday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 98. South wind around 5 mph.
Thursday Night
Mostly clear, with a low around 75. South wind 5 to 10 mph.
Friday
Mostly sunny, with a high near 98.
Friday Night
Mostly clear, with a low around 75.
Saturday
Mostly sunny, with a high near 98.
Saturday Night
Mostly clear, with a low around 75.
Sunday
Sunny and hot, with a high near 99.
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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:
6:42 pm CDT Aug 30, 2026
Forecast Valid:
11pm CDT Aug 30, 2026-6pm CDT Sep 6, 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