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.

Overcast

79°F

26°C

Humidity 56%
Wind Speed Vrbl 7 mph
Barometer 30.07 in (1017.8 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 22 Aug 11:52 am CDT
Extended Forecast for

De Soto IL

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 86. Northeast wind 5 to 7 mph.

    High: 86 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 62. East northeast wind around 5 mph becoming calm in the evening.

    Low: 62 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 89. Calm wind becoming north around 6 mph in the afternoon.

    High: 89 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 62. North northwest wind 3 to 6 mph.

    Low: 62 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 82. North wind 6 to 10 mph.

    High: 82 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 58. North northwest wind 5 to 7 mph becoming calm in the evening.

    Low: 58 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 80. Calm wind becoming northwest 5 to 8 mph in the morning.

    High: 80 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 55. North northwest wind around 6 mph becoming calm in the evening.

    Low: 55 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 78. Calm wind becoming north northwest 5 to 7 mph in the afternoon.

    High: 78 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 86. Northeast wind 5 to 7 mph.
Tonight
Mostly clear, with a low around 62. East northeast wind around 5 mph becoming calm in the evening.
Saturday
Mostly sunny, with a high near 89. Calm wind becoming north around 6 mph in the afternoon.
Saturday Night
Partly cloudy, with a low around 62. North northwest wind 3 to 6 mph.
Sunday
Sunny, with a high near 82. North wind 6 to 10 mph.
Sunday Night
Mostly clear, with a low around 58. North northwest wind 5 to 7 mph becoming calm in the evening.
Monday
Mostly sunny, with a high near 80. Calm wind becoming northwest 5 to 8 mph in the morning.
Monday Night
Partly cloudy, with a low around 55. North northwest wind around 6 mph becoming calm in the evening.
Tuesday
Mostly sunny, with a high near 78. Calm wind becoming north northwest 5 to 7 mph in the afternoon.
Tuesday Night
Mostly clear, with a low around 53. North wind around 5 mph becoming calm in the evening.
Wednesday
Sunny, with a high near 82. Calm wind becoming north northeast around 6 mph in the afternoon.
Wednesday Night
Partly cloudy, with a low around 55. North northeast wind around 5 mph becoming calm in the evening.
Thursday
Mostly sunny, with a high near 82. Calm wind becoming south around 6 mph in the afternoon.
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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:
12:01 pm CDT Aug 22, 2025
Forecast Valid:
12pm CDT Aug 22, 2025-6pm CDT Aug 28, 2025
 
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Additional Resources

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Chance of Precipitation