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 with Haze

64°F

18°C

Humidity 84%
Wind Speed Calm
Barometer 30.26 in (1024.6 mb)
Dewpoint 59°F (15°C)
Visibility 5.00 mi
Last update 2 Aug 7:52 am CDT
Extended Forecast for

De Soto IL

  • Today

    Today: Sunny, with a high near 81. Northeast wind 7 to 10 mph.

    High: 81 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 59. North northeast wind 3 to 7 mph.

    Low: 59 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 83. North northeast wind 5 to 7 mph.

    High: 83 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 65. Northeast wind around 6 mph becoming calm in the evening.

    Low: 65 °F

    Partly Cloudy

  • Monday

    Monday: A 20 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 82. Calm wind becoming northeast around 5 mph in the afternoon.

    High: 82 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

  • Monday Night

    Monday Night: A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am. Partly cloudy, with a low around 67. Light east wind. Chance of precipitation is 20%.

    Low: 67 °F

    Slight Chance
    T-storms then
    Slight Chance
    Showers

  • Tuesday

    Tuesday: A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 84. Calm wind becoming east southeast around 5 mph in the afternoon.

    High: 84 °F

    Partly Sunny
    then Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 68. Light east southeast wind.

    Low: 68 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 87. Light east southeast wind.

    High: 87 °F

    Sunny

Detailed Forecast

Today
Sunny, with a high near 81. Northeast wind 7 to 10 mph.
Tonight
Mostly clear, with a low around 59. North northeast wind 3 to 7 mph.
Sunday
Sunny, with a high near 83. North northeast wind 5 to 7 mph.
Sunday Night
Partly cloudy, with a low around 65. Northeast wind around 6 mph becoming calm in the evening.
Monday
A 20 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 82. Calm wind becoming northeast around 5 mph in the afternoon.
Monday Night
A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am. Partly cloudy, with a low around 67. Light east wind. Chance of precipitation is 20%.
Tuesday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 84. Calm wind becoming east southeast around 5 mph in the afternoon.
Tuesday Night
Mostly clear, with a low around 68. Light east southeast wind.
Wednesday
Sunny, with a high near 87. Light east southeast wind.
Wednesday Night
Mostly clear, with a low around 69. Light east wind.
Thursday
Sunny, with a high near 90. Calm wind becoming south around 5 mph in the afternoon.
Thursday Night
Mostly clear, with a low around 71. South southeast wind around 5 mph becoming calm in the evening.
Friday
Sunny, with a high near 92. Calm wind becoming south 5 to 7 mph in the morning.
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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:
6:32 am CDT Aug 2, 2025
Forecast Valid:
8am CDT Aug 2, 2025-6pm CDT Aug 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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation