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.

N/A

Humidity NA
Wind Speed NA
Barometer NA
Dewpoint N/A
Visibility NA
Last update *** Not a current observation ***
Extended Forecast for

De Soto IL

  • Overnight

    Overnight: Showers and thunderstorms before 4am, then a chance of showers. Low around 70. South southwest wind 6 to 8 mph. Chance of precipitation is 80%.

    Low: 70 °F

    Showers

  • Saturday

    Saturday: A slight chance of showers between 3pm and 4pm, then a chance of showers and thunderstorms after 4pm. Partly sunny, with a high near 79. West wind 8 to 11 mph. Chance of precipitation is 30%.

    High: 79 °F

    Partly Sunny
    then Chance
    Showers

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 66. West northwest wind 8 to 10 mph. Chance of precipitation is 50%.

    Low: 66 °F

    Chance
    Showers

  • Sunday

    Sunday: A 50 percent chance of showers. Mostly cloudy, with a high near 80. North northwest wind 11 to 14 mph, with gusts as high as 21 mph.

    High: 80 °F

    Chance
    Showers

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 65. North wind 5 to 10 mph becoming light north northwest after midnight.

    Low: 65 °F

    Partly Cloudy

  • Monday

    Monday: A 20 percent chance of showers after 1pm. Mostly sunny, with a high near 84. North wind 3 to 8 mph.

    High: 84 °F

    Partly Sunny
    then Slight
    Chance
    Showers

  • Monday Night

    Monday Night: Mostly clear, with a low around 65. North wind around 5 mph becoming calm in the evening.

    Low: 65 °F

    Mostly Clear

  • Tuesday

    Tuesday: A slight chance of showers after 1pm. Mostly sunny, with a high near 87. Calm wind becoming north around 5 mph in the afternoon.

    High: 87 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 66. Calm wind.

    Low: 66 °F

    Mostly Clear

Detailed Forecast

Overnight
Showers and thunderstorms before 4am, then a chance of showers. Low around 70. South southwest wind 6 to 8 mph. Chance of precipitation is 80%.
Saturday
A slight chance of showers between 3pm and 4pm, then a chance of showers and thunderstorms after 4pm. Partly sunny, with a high near 79. West wind 8 to 11 mph. Chance of precipitation is 30%.
Saturday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 66. West northwest wind 8 to 10 mph. Chance of precipitation is 50%.
Sunday
A 50 percent chance of showers. Mostly cloudy, with a high near 80. North northwest wind 11 to 14 mph, with gusts as high as 21 mph.
Sunday Night
Partly cloudy, with a low around 65. North wind 5 to 10 mph becoming light north northwest after midnight.
Monday
A 20 percent chance of showers after 1pm. Mostly sunny, with a high near 84. North wind 3 to 8 mph.
Monday Night
Mostly clear, with a low around 65. North wind around 5 mph becoming calm in the evening.
Tuesday
A slight chance of showers after 1pm. Mostly sunny, with a high near 87. Calm wind becoming north around 5 mph in the afternoon.
Tuesday Night
Mostly clear, with a low around 66. Calm wind.
Wednesday
Sunny, with a high near 90. Light and variable wind.
Wednesday Night
Mostly clear, with a low around 69. Calm wind.
Thursday
Mostly sunny, with a high near 92. Calm wind becoming south southwest around 6 mph in the afternoon.
Thursday Night
A slight chance of showers and thunderstorms. Mostly clear, with a low around 71. South southeast wind around 5 mph becoming calm in the evening.
Friday
Mostly sunny, with a high near 94. South wind 3 to 7 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:
11:00 pm CDT Jul 31, 2026
Forecast Valid:
12am CDT Aug 1, 2026-6pm CDT Aug 7, 2026
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation