Heavy Rain From the Central Plains to the Mid-Atlantic; Heat Wave Begins This Weekend

Strong to severe thunderstorms and heavy rain will impact portions of the central Plains into the Upper Midwest and the Mid-Atlantic through the weekend. A stretch of unusually hot and humid weather is expected across portions of the central U.S. and the Southeast beginning this weekend and continuing through next week. The heat may reach dangerous levels, particularly mid to late next week. Read More >

Current conditions at

Southern Illinois Airport (KMDH)

Lat: 37.78°NLon: 89.25°WElev: 400ft.

Fair

86°F

30°C

Humidity 70%
Wind Speed SW 8 mph
Barometer 30.02 in
Dewpoint 75°F (24°C)
Visibility 8.00 mi
Heat Index95°F (35°C)
Last update 20 Jul 10:52 am CDT
Extended Forecast for

2 Miles N De Soto IL

Heat Advisory July 20, 12:00pm until July 20, 08:00pm
Click here for hazard details and duration
Heat Advisory
  • Today

    Today: Mostly sunny, with a high near 94. Heat index values as high as 107. Southwest wind around 9 mph.

    High: 94 °F

    Mostly Sunny

  • Tonight

    Tonight: A slight chance of showers and thunderstorms between 1am and 4am.  Partly cloudy, with a low around 77. South southwest wind around 6 mph.  Chance of precipitation is 20%.

    Low: 77 °F

    Mostly Clear
    then Slight
    Chance
    T-storms

  • Monday

    Monday: A 30 percent chance of showers and thunderstorms after 1pm.  Mostly sunny, with a high near 93. Heat index values as high as 105. West wind around 6 mph becoming north in the afternoon.

    High: 93 °F

    Mostly Sunny
    then Chance
    T-storms

  • Monday Night

    Monday Night: A 20 percent chance of showers and thunderstorms before 1am.  Partly cloudy, with a low around 76. East northeast wind around 5 mph becoming calm  in the evening.

    Low: 76 °F

    Slight Chance
    T-storms

  • Tuesday

    Tuesday: A 20 percent chance of showers and thunderstorms after 1pm.  Mostly sunny, with a high near 93. South southeast wind 3 to 6 mph.

    High: 93 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 76. Southeast wind around 5 mph becoming calm  in the evening.

    Low: 76 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 96. Calm wind becoming south southwest around 6 mph in the morning.

    High: 96 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 77. South southeast wind around 5 mph becoming calm  in the evening.

    Low: 77 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 95. South southwest wind 3 to 7 mph.

    High: 95 °F

    Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 94. Heat index values as high as 107. Southwest wind around 9 mph.
Tonight
A slight chance of showers and thunderstorms between 1am and 4am. Partly cloudy, with a low around 77. South southwest wind around 6 mph. Chance of precipitation is 20%.
Monday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 93. Heat index values as high as 105. West wind around 6 mph becoming north in the afternoon.
Monday Night
A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 76. East northeast wind around 5 mph becoming calm in the evening.
Tuesday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 93. South southeast wind 3 to 6 mph.
Tuesday Night
Mostly clear, with a low around 76. Southeast wind around 5 mph becoming calm in the evening.
Wednesday
Sunny, with a high near 96. Calm wind becoming south southwest around 6 mph in the morning.
Wednesday Night
Mostly clear, with a low around 77. South southeast wind around 5 mph becoming calm in the evening.
Thursday
Sunny, with a high near 95. South southwest wind 3 to 7 mph.
Thursday Night
Mostly clear, with a low around 76. South wind 3 to 6 mph.
Friday
Sunny, with a high near 95. South southwest wind 3 to 7 mph.
Friday Night
Mostly clear, with a low around 76. South wind 3 to 6 mph.
Saturday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 94. South southwest wind 3 to 7 mph.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles N De Soto IL
 37.86°N 89.22°W
9:01 am CDT Jul 20, 2025
11am CDT Jul 20, 2025-6pm CDT Jul 26, 2025
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database