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

Hazardous Weather Conditions

Current conditions at

St. Louis Regional Airport (KALN)

Lat: 38.89°NLon: 90.03°WElev: 518ft.

Fair

91°F

33°C

Humidity 59%
Wind Speed S 8 mph
Barometer 30.02 in
Dewpoint 75°F (24°C)
Visibility 10.00 mi
Heat Index102°F (39°C)
Last update 30 Jun 12:50 pm CDT
Extended Forecast for

3 Miles ESE Edwardsville IL

Extreme Heat Warning June 30, 01:05pm until July 3, 10:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning June 30, 01:05pm until July 3, 10:00pm

    NOW until 10:00pm Fri

    Extreme Heat Warning

  • This Afternoon

    High: 96 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 75. South wind 5 to 10 mph becoming light after midnight.

    Low: 75 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 95. Heat index values as high as 106. South wind 5 to 10 mph.

    High: 95 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 76. South wind 5 to 10 mph.

    Low: 76 °F

    Clear

  • Thursday

    Thursday: A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 96. South wind 3 to 8 mph.

    High: 96 °F

    Sunny then
    Slight Chance
    T-storms

  • Thursday Night

    Thursday Night: A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 76.

    Low: 76 °F

    Slight Chance
    T-storms

  • Friday

    Friday: A 40 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 95.

    High: 95 °F

    Sunny then
    Chance
    T-storms

  • Friday Night

    Friday Night: A 30 percent chance of showers and thunderstorms, mainly before 1am. Partly cloudy, with a low around 75.

    Low: 75 °F

    Chance
    T-storms

Detailed Forecast

This Afternoon
Sunny, with a high near 96. Heat index values as high as 109. South wind around 10 mph.
Tonight
Clear, with a low around 75. South wind 5 to 10 mph becoming light after midnight.
Wednesday
Sunny, with a high near 95. Heat index values as high as 106. South wind 5 to 10 mph.
Wednesday Night
Clear, with a low around 76. South wind 5 to 10 mph.
Thursday
A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 96. South wind 3 to 8 mph.
Thursday Night
A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 76.
Friday
A 40 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 95.
Friday Night
A 30 percent chance of showers and thunderstorms, mainly before 1am. Partly cloudy, with a low around 75.
Independence Day
A 30 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 94.
Saturday Night
A 30 percent chance of showers and thunderstorms, mainly before 1am. Partly cloudy, with a low around 74.
Sunday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 92.
Sunday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 72.
Monday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 90.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles ESE Edwardsville IL
 38.79°N 89.91°W (Elev. 554 ft)
Last Update:
12:21 pm CDT Jun 30, 2026
Forecast Valid:
1pm CDT Jun 30, 2026-6pm CDT Jul 6, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation