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

Hazardous Weather Conditions

Current conditions at

Southern Illinois Airport (KMDH)

Lat: 37.78°NLon: 89.25°WElev: 400ft.

Fair

88°F

31°C

Humidity 62%
Wind Speed N 8 mph
Barometer 30.07 in
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index96°F (36°C)
Last update 14 Aug 9:52 am CDT
Extended Forecast for

Dowell IL

Extreme Heat Warning August 14, 10:00am until August 16, 08:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning August 14, 10:00am until August 16, 08:00pm

    NOW until 8:00pm Sun

    Extreme Heat Warning

  • Today

    High: 98 °F

    Hot

  • Tonight

    Tonight: Mostly clear, with a low around 76. South southeast wind 3 to 5 mph.

    Low: 76 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny and hot, with a high near 99. Heat index values as high as 110. Southwest wind 3 to 6 mph.

    High: 99 °F

    Hot

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 76. South southwest wind 3 to 6 mph.

    Low: 76 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny and hot, with a high near 100. West wind 5 to 7 mph.

    High: 100 °F

    Hot

  • Sunday Night

    Sunday Night: A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 73. Light north wind.

    Low: 73 °F

    Slight Chance
    T-storms

  • Monday

    Monday: Partly sunny, with a high near 90. North wind 5 to 9 mph.

    High: 90 °F

    Partly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 67. North wind 5 to 7 mph becoming calm in the evening.

    Low: 67 °F

    Partly Cloudy

Detailed Forecast

Today
Mostly sunny and hot, with a high near 98. Heat index values as high as 111. South southwest wind around 6 mph.
Tonight
Mostly clear, with a low around 76. South southeast wind 3 to 5 mph.
Saturday
Sunny and hot, with a high near 99. Heat index values as high as 110. Southwest wind 3 to 6 mph.
Saturday Night
Mostly clear, with a low around 76. South southwest wind 3 to 6 mph.
Sunday
Sunny and hot, with a high near 100. West wind 5 to 7 mph.
Sunday Night
A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 73. Light north wind.
Monday
Partly sunny, with a high near 90. North wind 5 to 9 mph.
Monday Night
Partly cloudy, with a low around 67. North wind 5 to 7 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 90. Light and variable wind.
Tuesday Night
Mostly clear, with a low around 70. Light and variable wind.
Wednesday
Mostly sunny, with a high near 96. Light south wind becoming southwest 6 to 11 mph in the morning.
Wednesday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 72. South southwest wind 6 to 8 mph becoming northeast after midnight.
Thursday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 91. North northwest wind 6 to 9 mph.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Dowell IL
 37.95°N 89.25°W
Last Update:
7:01 am CDT Aug 14, 2026
Forecast Valid:
10am CDT Aug 14, 2026-6pm CDT Aug 20, 2026
 
Forecast Discussion
 
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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation