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

46°F

8°C

Humidity 79%
Wind Speed S 3 mph
Barometer 30.13 in (1020.2 mb)
Dewpoint 40°F (4°C)
Visibility 10.00 mi
Last update 13 Nov 11:52 pm CST
Extended Forecast for

De Soto IL

  • Overnight

    Overnight: Increasing clouds, with a steady temperature around 47. South wind 3 to 6 mph.

    Low: 47 °F

    Increasing
    Clouds

  • Friday

    Friday: Mostly sunny, with a high near 73. South southwest wind 7 to 11 mph, with gusts as high as 20 mph.

    High: 73 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Increasing clouds, with a low around 59. South southwest wind 8 to 10 mph.

    Low: 59 °F

    Increasing
    Clouds

  • Saturday

    Saturday: Mostly sunny, with a high near 76. Southwest wind 10 to 15 mph, with gusts as high as 23 mph.

    High: 76 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 46. Southwest wind 6 to 10 mph becoming north northwest after midnight.

    Low: 46 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 61. North northwest wind 3 to 7 mph.

    High: 61 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 39. Light and variable wind.

    Low: 39 °F

    Mostly Clear

  • Monday

    Monday: A slight chance of showers after noon. Mostly sunny, with a high near 61. Light east wind becoming east southeast 5 to 9 mph in the morning.

    High: 61 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

  • Monday Night

    Monday Night: Showers likely, mainly before midnight. Mostly cloudy, with a low around 49. East southeast wind 6 to 8 mph.

    Low: 49 °F

    Showers
    Likely

Detailed Forecast

Overnight
Increasing clouds, with a steady temperature around 47. South wind 3 to 6 mph.
Friday
Mostly sunny, with a high near 73. South southwest wind 7 to 11 mph, with gusts as high as 20 mph.
Friday Night
Increasing clouds, with a low around 59. South southwest wind 8 to 10 mph.
Saturday
Mostly sunny, with a high near 76. Southwest wind 10 to 15 mph, with gusts as high as 23 mph.
Saturday Night
Partly cloudy, with a low around 46. Southwest wind 6 to 10 mph becoming north northwest after midnight.
Sunday
Sunny, with a high near 61. North northwest wind 3 to 7 mph.
Sunday Night
Mostly clear, with a low around 39. Light and variable wind.
Monday
A slight chance of showers after noon. Mostly sunny, with a high near 61. Light east wind becoming east southeast 5 to 9 mph in the morning.
Monday Night
Showers likely, mainly before midnight. Mostly cloudy, with a low around 49. East southeast wind 6 to 8 mph.
Tuesday
A chance of showers, mainly before noon. Partly sunny, with a high near 65. Southeast wind 8 to 10 mph becoming southwest in the morning.
Tuesday Night
A chance of showers. Mostly cloudy, with a low around 45. East southeast wind 3 to 7 mph.
Wednesday
A chance of showers. Mostly cloudy, with a high near 61. South wind 6 to 8 mph.
Wednesday Night
Showers likely. Cloudy, with a low around 49. South southeast wind 5 to 8 mph.
Thursday
Showers likely. Mostly cloudy, with a high near 62. South southeast wind 8 to 10 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:
9:51 pm CST Nov 13, 2025
Forecast Valid:
12am CST Nov 14, 2025-6pm CST Nov 20, 2025
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation