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

75°F

24°C

Humidity 94%
Wind Speed Calm
Barometer 29.94 in (1013.1 mb)
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Last update 7 Sep 4:56 am CDT
Extended Forecast for

3 Miles WSW Kyle TX

  • Labor Day

    Labor Day: A slight chance of showers between 10am and 1pm, then a slight chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 98. Heat index values as high as 103. Calm wind becoming east southeast around 5 mph in the afternoon. Chance of precipitation is 20%.

    High: 98 °F

    Slight Chance
    Showers then
    Slight Chance
    T-storms

  • Tonight

    Tonight: Mostly clear, with a low around 77. East southeast wind around 5 mph becoming south southwest after midnight.

    Low: 77 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny and hot, with a high near 99. Heat index values as high as 104. Calm wind becoming south around 5 mph in the afternoon.

    High: 99 °F

    Hot

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 76. Southeast wind around 5 mph.

    Low: 76 °F

    Mostly Clear

  • Wednesday

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

    High: 99 °F

    Hot

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 76. Southeast wind around 5 mph becoming south southwest after midnight.

    Low: 76 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 98. South southwest wind around 5 mph.

    High: 98 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 76. Southeast wind around 5 mph.

    Low: 76 °F

    Mostly Clear

  • Friday

    Friday: Sunny and hot, with a high near 100. South southwest wind around 5 mph.

    High: 100 °F

    Hot

Detailed Forecast

Labor Day
A slight chance of showers between 10am and 1pm, then a slight chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 98. Heat index values as high as 103. Calm wind becoming east southeast around 5 mph in the afternoon. Chance of precipitation is 20%.
Tonight
Mostly clear, with a low around 77. East southeast wind around 5 mph becoming south southwest after midnight.
Tuesday
Sunny and hot, with a high near 99. Heat index values as high as 104. Calm wind becoming south around 5 mph in the afternoon.
Tuesday Night
Mostly clear, with a low around 76. Southeast wind around 5 mph.
Wednesday
Sunny and hot, with a high near 99. Calm wind becoming south southeast around 5 mph in the afternoon.
Wednesday Night
Mostly clear, with a low around 76. Southeast wind around 5 mph becoming south southwest after midnight.
Thursday
Sunny, with a high near 98. South southwest wind around 5 mph.
Thursday Night
Mostly clear, with a low around 76. Southeast wind around 5 mph.
Friday
Sunny and hot, with a high near 100. South southwest wind around 5 mph.
Friday Night
Mostly clear, with a low around 76.
Saturday
Sunny and hot, with a high near 100.
Saturday Night
Mostly clear, with a low around 76.
Sunday
Sunny and hot, with a high near 99.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles WSW Kyle TX
 29.97°N 97.92°W (Elev. 650 ft)
Last Update:
2:44 am CDT Sep 7, 2026
Forecast Valid:
5am CDT Sep 7, 2026-6pm CDT Sep 13, 2026
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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