Current conditions at

Southern Illinois Airport (KMDH)

Lat: 37.78°NLon: 89.25°WElev: 400ft.

Snow Freezing Fog

29°F

-2°C

Humidity 96%
Wind Speed W 7 mph
Barometer 30.07 in (1018.5 mb)
Dewpoint 28°F (-2°C)
Visibility 0.50 mi
Wind Chill22°F (-6°C)
Last update 1 Dec 10:52 pm CST
Extended Forecast for

3 Miles SE De Soto IL

Winter Weather Advisory December 1, 11:44pm until December 2, 06:00am
Click here for hazard details and duration
Winter Weather Advisory
  •  
    Winter Weather Advisory December 1, 11:44pm until December 2, 06:00am

    NOW until 6:00am Tue

    Winter Weather Advisory

  • Tonight

    Low: 22 °F

    Heavy Snow

  • Tuesday

    Tuesday: Mostly cloudy, then gradually becoming sunny, with a high near 32. Northwest wind 5 to 7 mph becoming calm  in the afternoon.

    High: 32 °F

    Decreasing
    Clouds

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 21. Light south wind.

    Low: 21 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 41. South southwest wind 5 to 9 mph becoming light  in the afternoon.

    High: 41 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 20. Light and variable wind becoming north northwest 6 to 11 mph after midnight. Winds could gust as high as 18 mph.

    Low: 20 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 28. North wind 5 to 11 mph, with gusts as high as 18 mph.

    High: 28 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A 20 percent chance of snow showers after midnight.  Mostly cloudy, with a low around 17. Light and variable wind.

    Low: 17 °F

    Partly Cloudy
    then Slight
    Chance Snow
    Showers

  • Friday

    Friday: A slight chance of snow showers before noon, then a slight chance of rain and snow showers.  Mostly sunny, with a high near 38. Calm wind becoming south southwest around 5 mph.

    High: 38 °F

    Slight Chance
    Snow Showers
    then Slight
    Chance
    Rain/Snow

Detailed Forecast

Tonight
Snow, mainly before 1am. The snow could be heavy at times. Low around 22. Northwest wind 5 to 7 mph. Chance of precipitation is 80%. Total nighttime snow accumulation of 1 to 3 inches possible.
Tuesday
Mostly cloudy, then gradually becoming sunny, with a high near 32. Northwest wind 5 to 7 mph becoming calm in the afternoon.
Tuesday Night
Mostly clear, with a low around 21. Light south wind.
Wednesday
Mostly sunny, with a high near 41. South southwest wind 5 to 9 mph becoming light in the afternoon.
Wednesday Night
Mostly cloudy, with a low around 20. Light and variable wind becoming north northwest 6 to 11 mph after midnight. Winds could gust as high as 18 mph.
Thursday
Mostly sunny, with a high near 28. North wind 5 to 11 mph, with gusts as high as 18 mph.
Thursday Night
A 20 percent chance of snow showers after midnight. Mostly cloudy, with a low around 17. Light and variable wind.
Friday
A slight chance of snow showers before noon, then a slight chance of rain and snow showers. Mostly sunny, with a high near 38. Calm wind becoming south southwest around 5 mph.
Friday Night
Partly cloudy, with a low around 25. Calm wind.
Saturday
Mostly sunny, with a high near 42. Calm wind becoming southwest 5 to 7 mph in the morning.
Saturday Night
Mostly cloudy, with a low around 29. Light and variable wind becoming west northwest around 6 mph after midnight.
Sunday
Mostly cloudy, with a high near 41. West northwest wind 6 to 8 mph becoming north in the afternoon.
Sunday Night
Mostly cloudy, with a low around 21. North wind 3 to 5 mph.
Monday
Partly sunny, with a high near 38. Light and variable wind becoming north northeast around 5 mph.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SE De Soto IL
 37.79°N 89.2°W
11:31 pm CST Dec 1, 2025
11pm CST Dec 1, 2025-6pm CST Dec 8, 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