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

Tropical Storm Arthur and Heavy Rainfall in the South; Severe Weather in the Midwest

An outbreak of severe thunderstorms is expected across portions of Illinois and Indiana tonight. Intense tornadoes, swaths of damaging gusts, and hail in excess of 2 inches in diameter possible. Tropical Storm Arthur will continue to produce strong winds across coastal Upper Texas and Louisiana tonight, as well as potentially life-threatening flooding across southern Louisiana into Mississippi. Read More >

Hazardous Weather Conditions

Current conditions at

San Antonio, Stinson Municipal Airport (KSSF)

Lat: 29.34°NLon: 98.47°WElev: 574ft.

Fair

88°F

31°C

Humidity 61%
Wind Speed SE 6 mph
Barometer 29.59 in (1000.6 mb)
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index96°F (36°C)
Last update 17 Jun 7:53 pm CDT
Extended Forecast for

San Antonio, Stinson Municipal Airport TX

Extreme Heat Warning June 18, 12:00pm until June 18, 08:00pm
Click here for hazard details and duration
Extreme Heat Warning

  • Tonight

    Tonight: Mostly clear, with a low around 77. Southeast wind 5 to 10 mph.

    Low: 77 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 95. Heat index values as high as 110. South southeast wind 5 to 15 mph, with gusts as high as 20 mph.

    High: 95 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Increasing clouds, with a low around 79. East southeast wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 79 °F

    Increasing
    Clouds

  • Juneteenth

    Juneteenth: Partly sunny, with a high near 93. Heat index values as high as 106. Southeast wind around 10 mph, with gusts as high as 20 mph.

    High: 93 °F

    Partly Sunny

  • Friday Night

    Friday Night: A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 4am, then a chance of showers and thunderstorms after 4am. Mostly cloudy, with a low around 78. Southeast wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 40%.

    Low: 78 °F

    Chance
    T-storms then
    Chance
    Showers

  • Saturday

    Saturday: A 50 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 91. South southeast wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 91 °F

    Slight Chance
    T-storms then
    Chance
    T-storms

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms before 1am, then a slight chance of showers. Partly cloudy, with a low around 77. Southeast wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 40%.

    Low: 77 °F

    Chance
    T-storms

  • Sunday

    Sunday: Partly sunny, with a high near 94. South wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 94 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 77. South southeast wind around 15 mph, with gusts as high as 25 mph.

    Low: 77 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 77. Southeast wind 5 to 10 mph.
Thursday
Mostly sunny, with a high near 95. Heat index values as high as 110. South southeast wind 5 to 15 mph, with gusts as high as 20 mph.
Thursday Night
Increasing clouds, with a low around 79. East southeast wind 10 to 15 mph, with gusts as high as 20 mph.
Juneteenth
Partly sunny, with a high near 93. Heat index values as high as 106. Southeast wind around 10 mph, with gusts as high as 20 mph.
Friday Night
A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 4am, then a chance of showers and thunderstorms after 4am. Mostly cloudy, with a low around 78. Southeast wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 40%.
Saturday
A 50 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 91. South southeast wind 10 to 15 mph, with gusts as high as 20 mph.
Saturday Night
A chance of showers and thunderstorms before 1am, then a slight chance of showers. Partly cloudy, with a low around 77. Southeast wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 40%.
Sunday
Partly sunny, with a high near 94. South wind 10 to 15 mph, with gusts as high as 25 mph.
Sunday Night
Mostly clear, with a low around 77. South southeast wind around 15 mph, with gusts as high as 25 mph.
Monday
Mostly sunny, with a high near 95.
Monday Night
Mostly clear, with a low around 77.
Tuesday
Mostly sunny, with a high near 94.
Tuesday Night
Mostly clear, with a low around 76.
Wednesday
Mostly sunny, with a high near 96.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
San Antonio, Stinson Municipal Airport TX
 29.32°N 98.47°W (Elev. 581 ft)
Last Update:
8:12 pm CDT Jun 17, 2026
Forecast Valid:
8pm CDT Jun 17, 2026-6pm CDT Jun 24, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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