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

San Antonio, San Antonio International Airport (KSAT)

Lat: 29.53°NLon: 98.46°WElev: 807ft.

Light Rain

71°F

22°C

Humidity 94%
Wind Speed SE 13 mph
Barometer 29.95 in (1012.3 mb)
Dewpoint 69°F (21°C)
Visibility 10.00 mi
Last update 21 May 6:51 am CDT
Extended Forecast for

San Antonio International Airport TX

  • Today

    Today: A 40 percent chance of showers and thunderstorms, mainly before 1pm. Cloudy, then gradually becoming mostly sunny, with a high near 83. North northeast wind around 5 mph becoming south in the afternoon.

    High: 83 °F

    Chance
    Showers

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 69. South southeast wind around 5 mph becoming calm in the evening.

    Low: 69 °F

    Slight Chance
    T-storms

  • Friday

    Friday: Mostly cloudy, then gradually becoming sunny, with a high near 87. Calm wind becoming south southeast around 5 mph in the afternoon.

    High: 87 °F

    Decreasing
    Clouds

  • Friday Night

    Friday Night: A 40 percent chance of showers and thunderstorms. Increasing clouds, with a low around 71. South southeast wind around 5 mph.

    Low: 71 °F

    Chance
    T-storms

  • Saturday

    Saturday: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1pm. High near 83. Southeast wind around 5 mph. Chance of precipitation is 90%.

    High: 83 °F

    Chance
    T-storms then
    Showers

  • Saturday Night

    Saturday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 68. East southeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 70%.

    Low: 68 °F

    Showers
    Likely

  • Sunday

    Sunday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 85. East wind around 5 mph. Chance of precipitation is 60%.

    High: 85 °F

    Chance
    T-storms then
    Showers
    Likely

  • Sunday Night

    Sunday Night: A 30 percent chance of showers and thunderstorms, mainly before 1am. Partly cloudy, with a low around 69. East northeast wind around 5 mph becoming calm in the evening.

    Low: 69 °F

    Chance
    T-storms

  • Memorial Day

    Memorial Day: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 86. Calm wind becoming east around 5 mph in the afternoon.

    High: 86 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

Detailed Forecast

Today
A 40 percent chance of showers and thunderstorms, mainly before 1pm. Cloudy, then gradually becoming mostly sunny, with a high near 83. North northeast wind around 5 mph becoming south in the afternoon.
Tonight
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 69. South southeast wind around 5 mph becoming calm in the evening.
Friday
Mostly cloudy, then gradually becoming sunny, with a high near 87. Calm wind becoming south southeast around 5 mph in the afternoon.
Friday Night
A 40 percent chance of showers and thunderstorms. Increasing clouds, with a low around 71. South southeast wind around 5 mph.
Saturday
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1pm. High near 83. Southeast wind around 5 mph. Chance of precipitation is 90%.
Saturday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 68. East southeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 70%.
Sunday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 85. East wind around 5 mph. Chance of precipitation is 60%.
Sunday Night
A 30 percent chance of showers and thunderstorms, mainly before 1am. Partly cloudy, with a low around 69. East northeast wind around 5 mph becoming calm in the evening.
Memorial Day
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 86. Calm wind becoming east around 5 mph in the afternoon.
Monday Night
A 20 percent chance of showers and thunderstorms. Mostly clear, with a low around 71.
Tuesday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 86.
Tuesday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 73.
Wednesday
Showers and thunderstorms likely. Mostly cloudy, with a high near 85. Chance of precipitation is 70%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
San Antonio International Airport TX
 29.55°N 98.46°W (Elev. 751 ft)
Last Update:
6:42 am CDT May 21, 2026
Forecast Valid:
7am CDT May 21, 2026-6pm CDT May 27, 2026
 
Forecast Discussion
 
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Additional Resources

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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