Heavy Rainfall and Flooding Threats in the Midwest and Ohio Valley; Heat Continues in the Plains and Southeast

An active pattern will continue to bring heavy to excessive rainfall and flash flooding threats to the Midwest and Ohio Valley over the next couple of days. Dangerous heat continues across the central/southern Plains and Southeast U.S. into next week. There is potential for record-tying/breaking temperatures with many areas forecast to see their hottest temperatures so far this year. Read More >

Current conditions at

St. Louis Regional Airport (KALN)

Lat: 38.89°NLon: 90.03°WElev: 518ft.

Fair

91°F

33°C

Humidity 67%
Wind Speed S 10 G 20 mph
Barometer 29.87 in
Dewpoint 79°F (26°C)
Visibility 10.00 mi
Heat Index107°F (42°C)
Last update 13 Aug 5:45 pm CDT
Extended Forecast for

Edwardsville IL

Extreme Heat Warning August 13, 06:45pm until August 15, 09:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning August 13, 06:45pm until August 15, 09:00pm

    NOW until 9:00pm Sat

    Extreme Heat Warning

  • Tonight

    Low: 76 °F

    Partly Cloudy

  • Friday

    Friday: A 20 percent chance of showers and thunderstorms before 8am.  Mostly cloudy, then gradually becoming sunny and hot, with a high near 97. Heat index values as high as 113. South wind 5 to 8 mph.

    High: 97 °F

    Slight Chance
    T-storms then
    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 77. Southeast wind 6 to 9 mph.

    Low: 77 °F

    Mostly Clear

  • Saturday

    Saturday: Partly sunny through mid morning, then becoming sunny and hot, with a high near 97. Heat index values as high as 109. Southwest wind 5 to 7 mph.

    High: 97 °F

    Hot

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 76. Light southwest wind.

    Low: 76 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 96.

    High: 96 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms.  Partly cloudy, with a low around 72. Chance of precipitation is 40%.

    Low: 72 °F

    Chance
    T-storms

  • Monday

    Monday: A 20 percent chance of showers and thunderstorms after 1pm.  Mostly sunny, with a high near 87.

    High: 87 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

Detailed Forecast

Tonight
Partly cloudy, with a low around 76. South wind 5 to 9 mph.
Friday
A 20 percent chance of showers and thunderstorms before 8am. Mostly cloudy, then gradually becoming sunny and hot, with a high near 97. Heat index values as high as 113. South wind 5 to 8 mph.
Friday Night
Mostly clear, with a low around 77. Southeast wind 6 to 9 mph.
Saturday
Partly sunny through mid morning, then becoming sunny and hot, with a high near 97. Heat index values as high as 109. Southwest wind 5 to 7 mph.
Saturday Night
Mostly clear, with a low around 76. Light southwest wind.
Sunday
Mostly sunny, with a high near 96.
Sunday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 72. Chance of precipitation is 40%.
Monday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 87.
Monday Night
Partly cloudy, with a low around 69.
Tuesday
Sunny, with a high near 88.
Tuesday Night
Mostly clear, with a low around 71.
Wednesday
Mostly sunny, with a high near 93.
Wednesday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 72.
Thursday
Mostly sunny, with a high near 89.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
Edwardsville IL
 38.81°N 89.97°W (Elev. 499 ft)
5:46 pm CDT Aug 13, 2026
6pm CDT Aug 13, 2026-6pm CDT Aug 20, 2026
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database