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

20°F

-7°C

Humidity 74%
Wind Speed NW 8 mph
Barometer 30.41 in (1030.4 mb)
Dewpoint 13°F (-11°C)
Visibility 10.00 mi
Wind Chill10°F (-12°C)
Last update 30 Dec 2:52 am CST
Extended Forecast for

De Soto IL

  • Overnight

    Overnight: Mostly clear, with a steady temperature around 21. Northwest wind around 9 mph, with gusts as high as 18 mph.

    Low: 21 °F

    Mostly Clear

  • Tuesday

    Tuesday: Increasing clouds, with a high near 35. Northwest wind 6 to 9 mph becoming southwest in the afternoon.

    High: 35 °F

    Increasing
    Clouds

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 27. Southwest wind around 7 mph.

    Low: 27 °F

    Mostly Clear

  • Wednesday

    Wednesday: Increasing clouds, with a high near 44. West northwest wind 5 to 9 mph.

    High: 44 °F

    Increasing
    Clouds

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 26. Light and variable wind.

    Low: 26 °F

    Mostly Clear

  • New Year's Day

    New Year's Day: Mostly sunny, with a high near 41. North northeast wind around 5 mph becoming calm in the afternoon.

    High: 41 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 31. Calm wind.

    Low: 31 °F

    Mostly Cloudy

  • Friday

    Friday: Cloudy, with a high near 48. Calm wind becoming northeast around 6 mph in the afternoon.

    High: 48 °F

    Cloudy

  • Friday Night

    Friday Night: A slight chance of showers before midnight. Mostly cloudy, with a low around 29. North northeast wind 3 to 6 mph.

    Low: 29 °F

    Slight Chance
    Showers then
    Mostly Cloudy

Detailed Forecast

Overnight
Mostly clear, with a steady temperature around 21. Northwest wind around 9 mph, with gusts as high as 18 mph.
Tuesday
Increasing clouds, with a high near 35. Northwest wind 6 to 9 mph becoming southwest in the afternoon.
Tuesday Night
Mostly clear, with a low around 27. Southwest wind around 7 mph.
Wednesday
Increasing clouds, with a high near 44. West northwest wind 5 to 9 mph.
Wednesday Night
Mostly clear, with a low around 26. Light and variable wind.
New Year's Day
Mostly sunny, with a high near 41. North northeast wind around 5 mph becoming calm in the afternoon.
Thursday Night
Mostly cloudy, with a low around 31. Calm wind.
Friday
Cloudy, with a high near 48. Calm wind becoming northeast around 6 mph in the afternoon.
Friday Night
A slight chance of showers before midnight. Mostly cloudy, with a low around 29. North northeast wind 3 to 6 mph.
Saturday
Mostly sunny, with a high near 43. North wind 3 to 6 mph.
Saturday Night
Partly cloudy, with a low around 28. Calm wind.
Sunday
Mostly sunny, with a high near 50. Calm wind becoming south 5 to 7 mph in the morning.
Sunday Night
Partly cloudy, with a low around 35. South wind around 6 mph becoming west southwest after midnight.
Monday
Sunny, with a high near 51. West northwest wind 6 to 8 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
De Soto IL
 37.81°N 89.23°W
Last Update:
3:16 am CST Dec 30, 2025
Forecast Valid:
3am CST Dec 30, 2025-6pm CST Jan 5, 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