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: A 30 percent chance of showers and thunderstorms, mainly before 4am. Patchy fog after 5am. Otherwise, mostly cloudy, with a low around 70. Calm wind.

    Low: 70 °F

    Chance
    T-storms and
    Patchy Fog

  • Tuesday

    Tuesday: A 30 percent chance of showers and thunderstorms, mainly between 7am and 1pm. Patchy fog before 8am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 86. West southwest wind 3 to 7 mph.

    High: 86 °F

    Chance
    T-storms and
    Patchy Fog

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 73. South wind 5 to 7 mph.

    Low: 73 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A slight chance of showers before 10am, then a slight chance of showers and thunderstorms between 10am and 1pm, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 86. South southwest wind 10 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 60%.

    High: 86 °F

    Slight Chance
    T-storms then
    Showers
    Likely

  • Wednesday Night

    Wednesday Night: Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 70. South southwest wind 6 to 11 mph, with gusts as high as 18 mph. Chance of precipitation is 60%.

    Low: 70 °F

    Showers
    Likely

  • Juneteenth

    Juneteenth: A slight chance of thunderstorms before 7am. Mostly sunny, with a high near 85. West wind 3 to 6 mph. Chance of precipitation is 10%.

    High: 85 °F

    Slight Chance
    T-storms then
    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 68. Calm wind.

    Low: 68 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 89. Calm wind becoming south southwest 5 to 7 mph in the morning.

    High: 89 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 74. South wind around 6 mph.

    Low: 74 °F

    Mostly Clear

Detailed Forecast

Overnight
A 30 percent chance of showers and thunderstorms, mainly before 4am. Patchy fog after 5am. Otherwise, mostly cloudy, with a low around 70. Calm wind.
Tuesday
A 30 percent chance of showers and thunderstorms, mainly between 7am and 1pm. Patchy fog before 8am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 86. West southwest wind 3 to 7 mph.
Tuesday Night
Partly cloudy, with a low around 73. South wind 5 to 7 mph.
Wednesday
A slight chance of showers before 10am, then a slight chance of showers and thunderstorms between 10am and 1pm, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 86. South southwest wind 10 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 60%.
Wednesday Night
Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 70. South southwest wind 6 to 11 mph, with gusts as high as 18 mph. Chance of precipitation is 60%.
Juneteenth
A slight chance of thunderstorms before 7am. Mostly sunny, with a high near 85. West wind 3 to 6 mph. Chance of precipitation is 10%.
Thursday Night
Mostly clear, with a low around 68. Calm wind.
Friday
Sunny, with a high near 89. Calm wind becoming south southwest 5 to 7 mph in the morning.
Friday Night
Mostly clear, with a low around 74. South wind around 6 mph.
Saturday
Sunny, with a high near 93. South southwest wind 7 to 11 mph, with gusts as high as 18 mph.
Saturday Night
Clear, with a low around 76. South wind 6 to 9 mph.
Sunday
Sunny, with a high near 93. South southwest wind 6 to 10 mph.
Sunday Night
Mostly clear, with a low around 75. South wind 5 to 7 mph.
Monday
A slight chance of showers and thunderstorms. Sunny, with a high near 92. South wind 5 to 8 mph.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
De Soto IL
 37.81°N 89.23°W
Last Update:
12:01 am CDT Jun 17, 2025
Forecast Valid:
1am CDT Jun 17, 2025-6pm CDT Jun 23, 2025
 
Forecast Discussion
 
Get as KML Get as XML

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