Hazardous Weather Conditions
Current conditions at
Southern Illinois Airport (KMDH)
Lat: 37.78°NLon: 89.25°WElev: 400ft.
Overcast
79°F
26°C
| Humidity | 85% |
| Wind Speed | S 9 mph |
| Barometer | 29.99 in (1015.2 mb) |
| Dewpoint | 74°F (23°C) |
| Visibility | 10.00 mi |
| Heat Index | 83°F (28°C) |
| Last update | 15 Oct 11:52 am CDT |
Extended Forecast for
De Soto IL
This Afternoon

High: 87 °F
Showers
LikelyTonight
Low: 48 °F
Chance
T-storms then
Chance
ShowersFriday
High: 58 °F
Breezy.
Chance
Showers then
Partly SunnyFriday Night

Low: 40 °F
Mostly Cloudy
Saturday

High: 60 °F
Sunny
Saturday Night

Low: 35 °F
Clear
Sunday

High: 66 °F
Sunny
Sunday Night

Low: 39 °F
Mostly Clear
Monday

High: 70 °F
Mostly Sunny
Detailed Forecast
This Afternoon
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 4pm. Partly sunny, with a high near 87. Southwest wind 8 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.
Tonight
A chance of showers and thunderstorms. Increasing clouds, with a low around 48. Southwest wind 6 to 16 mph becoming northwest after midnight. Winds could gust as high as 24 mph. Chance of precipitation is 50%.
Friday
A 30 percent chance of showers before 7am. Cloudy, then gradually becoming mostly sunny, with a high near 58. Breezy, with a northwest wind 16 to 20 mph, with gusts as high as 28 mph.
Friday Night
Mostly cloudy, with a low around 40. North wind 10 to 14 mph, with gusts as high as 20 mph.
Saturday
Sunny, with a high near 60. North northeast wind 7 to 10 mph.
Saturday Night
Clear, with a low around 35. Calm wind.
Sunday
Sunny, with a high near 66. Calm wind becoming south southeast around 5 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 39. Calm wind.
Monday
Mostly sunny, with a high near 70. Calm wind becoming south around 5 mph in the afternoon.
Monday Night
Partly cloudy, with a low around 42. Calm wind.
Tuesday
Mostly sunny, with a high near 73. Calm wind.
Tuesday Night
Mostly clear, with a low around 44. Calm wind.
Wednesday
Sunny, with a high near 77. Light and variable wind.
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ABOUT THIS FORECAST
Point Forecast:
De Soto IL
37.81°N 89.23°W
37.81°N 89.23°W
11:31 am CDT Oct 15, 2026
12pm CDT Oct 15, 2026-6pm CDT Oct 21, 2026



