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

Southern Illinois Airport (KMDH)

Lat: 37.78°NLon: 89.25°WElev: 400ft.

Fair

58°F

14°C

Humidity 78%
Wind Speed Calm
Barometer 30.01 in (1016.1 mb)
Dewpoint 51°F (11°C)
Visibility 10.00 mi
Last update 6 Oct 8:52 pm CDT
Extended Forecast for

4 Miles NNW De Soto IL

  • Tonight

    Tonight: Mostly clear, with a low around 49. Calm wind.

    Low: 49 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 86. West southwest wind 3 to 8 mph.

    High: 86 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 57. Light and variable wind.

    Low: 57 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 84. Calm wind becoming north northeast around 6 mph in the afternoon.

    High: 84 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 53. Light northeast wind.

    Low: 53 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 83. Calm wind becoming east southeast 5 to 7 mph in the morning.

    High: 83 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 57. Light southeast wind.

    Low: 57 °F

    Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 86. Light south southeast wind becoming south 6 to 11 mph in the morning.

    High: 86 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A chance of showers, with thunderstorms also possible after 1am. Partly cloudy, with a low around 58. Southeast wind 5 to 7 mph.

    Low: 58 °F

    Chance
    Showers

Detailed Forecast

Tonight
Mostly clear, with a low around 49. Calm wind.
Wednesday
Sunny, with a high near 86. West southwest wind 3 to 8 mph.
Wednesday Night
Mostly clear, with a low around 57. Light and variable wind.
Thursday
Sunny, with a high near 84. Calm wind becoming north northeast around 6 mph in the afternoon.
Thursday Night
Clear, with a low around 53. Light northeast wind.
Friday
Sunny, with a high near 83. Calm wind becoming east southeast 5 to 7 mph in the morning.
Friday Night
Clear, with a low around 57. Light southeast wind.
Saturday
Mostly sunny, with a high near 86. Light south southeast wind becoming south 6 to 11 mph in the morning.
Saturday Night
A chance of showers, with thunderstorms also possible after 1am. Partly cloudy, with a low around 58. Southeast wind 5 to 7 mph.
Sunday
A chance of showers, mainly before 1pm. Partly sunny, with a high near 77. East wind 6 to 9 mph.
Sunday Night
Partly cloudy, with a low around 57. Light west northwest wind.
Columbus Day
Mostly sunny, with a high near 81. Calm wind becoming north northwest 5 to 7 mph in the morning.
Monday Night
A slight chance of showers. Partly cloudy, with a low around 58. South southeast wind 3 to 5 mph.
Tuesday
A slight chance of showers. Mostly sunny, with a high near 81. South southwest wind 5 to 10 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles NNW De Soto IL
 37.86°N 89.25°W
Last Update:
7:20 pm CDT Oct 6, 2026
Forecast Valid:
9pm CDT Oct 6, 2026-6pm CDT Oct 13, 2026
 
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Additional Resources

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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