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.

Partly Cloudy

88°F

31°C

Humidity 68%
Wind Speed SW 16 G 22 mph
Barometer 30.02 in (1016.2 mb)
Dewpoint 76°F (24°C)
Visibility 10.00 mi
Heat Index99°F (37°C)
Last update 21 Jun 10:52 am CDT
Extended Forecast for

3 Miles SE De Soto IL

Heat Advisory June 21, 12:00pm until June 24, 07:00pm
Click here for hazard details and duration
Heat Advisory

  • Today

    Today: Sunny, with a high near 95. Heat index values as high as 106. South southwest wind 11 to 14 mph, with gusts as high as 22 mph.

    High: 95 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 76. South wind 6 to 10 mph.

    Low: 76 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 95. South southwest wind 6 to 10 mph.

    High: 95 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 76. South wind 5 to 7 mph.

    Low: 76 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 94. South wind 3 to 6 mph.

    High: 94 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 75. South wind around 6 mph becoming calm in the evening.

    Low: 75 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 93. Calm wind becoming south around 5 mph in the afternoon.

    High: 93 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 75. Light south wind.

    Low: 75 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 94. Calm wind becoming south southwest around 6 mph in the afternoon.

    High: 94 °F

    Sunny

Detailed Forecast

Today
Sunny, with a high near 95. Heat index values as high as 106. South southwest wind 11 to 14 mph, with gusts as high as 22 mph.
Tonight
Clear, with a low around 76. South wind 6 to 10 mph.
Sunday
Sunny, with a high near 95. South southwest wind 6 to 10 mph.
Sunday Night
Clear, with a low around 76. South wind 5 to 7 mph.
Monday
Sunny, with a high near 94. South wind 3 to 6 mph.
Monday Night
Mostly clear, with a low around 75. South wind around 6 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 93. Calm wind becoming south around 5 mph in the afternoon.
Tuesday Night
Mostly clear, with a low around 75. Light south wind.
Wednesday
Sunny, with a high near 94. Calm wind becoming south southwest around 6 mph in the afternoon.
Wednesday Night
Mostly clear, with a low around 76. South wind around 6 mph becoming calm in the evening.
Thursday
Sunny, with a high near 93. Calm wind becoming south southwest 5 to 7 mph in the morning.
Thursday Night
Mostly clear, with a low around 75. South southwest wind 3 to 7 mph.
Friday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 92. Southwest wind 3 to 8 mph.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SE De Soto IL
 37.79°N 89.2°W
Last Update:
11:15 am CDT Jun 21, 2025
Forecast Valid:
11am CDT Jun 21, 2025-6pm CDT Jun 27, 2025
 
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