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

Hazardous Weather Conditions

Current conditions at

San Antonio, San Antonio International Airport (KSAT)

Lat: 29.53°NLon: 98.46°WElev: 807ft.

Partly Cloudy

97°F

36°C

Humidity 40%
Wind Speed SE 12 G 17 mph
Barometer 29.87 in
Dewpoint 69°F (21°C)
Visibility 10.00 mi
Heat Index103°F (39°C)
Last update 12 Sep 3:51 pm CDT
Extended Forecast for

Alamo Heights TX

Heat Advisory until September 12, 07:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory until September 12, 07:00pm

    NOW until 7:00pm Sat

    Heat Advisory

  • This Afternoon

    High: 102 °F

    Slight Chance
    T-storms

  • Tonight

    Tonight: A slight chance of showers and thunderstorms before 7pm, then a slight chance of showers between 7pm and 9pm. Partly cloudy, with a low around 78. Southeast wind 5 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.

    Low: 78 °F

    Slight Chance
    T-storms then
    Mostly Cloudy

  • Sunday

    Sunday: Mostly sunny and hot, with a high near 100. Heat index values as high as 104. South southeast wind 5 to 10 mph.

    High: 100 °F

    Hot

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 78. Southeast wind 5 to 15 mph, with gusts as high as 20 mph.

    Low: 78 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny and hot, with a high near 99. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 99 °F

    Hot

  • Monday Night

    Monday Night: Partly cloudy, with a low around 77. Southeast wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 77 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny and hot, with a high near 100. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 100 °F

    Hot

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 77. Southeast wind 5 to 15 mph, with gusts as high as 25 mph.

    Low: 77 °F

    Mostly Clear

Detailed Forecast

This Afternoon
A 20 percent chance of showers and thunderstorms. Mostly sunny and hot, with a high near 102. Heat index values as high as 109. South southeast wind around 10 mph, with gusts as high as 20 mph.
Tonight
A slight chance of showers and thunderstorms before 7pm, then a slight chance of showers between 7pm and 9pm. Partly cloudy, with a low around 78. Southeast wind 5 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Sunday
Mostly sunny and hot, with a high near 100. Heat index values as high as 104. South southeast wind 5 to 10 mph.
Sunday Night
Mostly clear, with a low around 78. Southeast wind 5 to 15 mph, with gusts as high as 20 mph.
Monday
Mostly sunny and hot, with a high near 99. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Monday Night
Partly cloudy, with a low around 77. Southeast wind 10 to 15 mph, with gusts as high as 20 mph.
Tuesday
Sunny and hot, with a high near 100. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Tuesday Night
Mostly clear, with a low around 77. Southeast wind 5 to 15 mph, with gusts as high as 25 mph.
Wednesday
Mostly sunny, with a high near 98. Southeast wind 5 to 10 mph.
Wednesday Night
Partly cloudy, with a low around 77.
Thursday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 97.
Thursday Night
Partly cloudy, with a low around 76.
Friday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 96.
Friday Night
A 20 percent chance of showers. Partly cloudy, with a low around 75.
Saturday
Mostly sunny, with a high near 95.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Alamo Heights TX
 29.48°N 98.48°W (Elev. 699 ft)
Last Update:
4:16 pm CDT Sep 12, 2026
Forecast Valid:
4pm CDT Sep 12, 2026-6pm CDT Sep 19, 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