Current conditions at
Southern Illinois Airport (KMDH)
Lat: 37.78°NLon: 89.25°WElev: 400ft.
A Few Clouds
86°F
30°C
| Humidity | 49% |
| Wind Speed | N 6 mph |
| Barometer | 29.94 in |
| Dewpoint | 64°F (18°C) |
| Visibility | 10.00 mi |
| Heat Index | 88°F (31°C) |
| Last update | 3 Aug 5:52 pm CDT |
Extended Forecast for
De Soto IL
Tonight
Low: 64 °F
Mostly Clear
then Patchy
FogTuesday
High: 87 °F
Patchy Fog
then SunnyTuesday Night
Low: 64 °F
Clear
Wednesday
High: 89 °F
Becoming
SunnyWednesday Night
Low: 68 °F
Mostly Clear
Thursday
High: 87 °F
Chance
ShowersThursday Night
Low: 70 °F
Chance
T-storms then
Showers
LikelyFriday
High: 87 °F
Chance
T-stormsFriday Night
Low: 69 °F
Chance
T-storms
Detailed Forecast
Tonight
Patchy fog after 5am. Otherwise, mostly clear, with a low around 64. Calm wind.
Tuesday
Patchy fog before 8am. Otherwise, sunny, with a high near 87. Calm wind.
Tuesday Night
Clear, with a low around 64. Calm wind.
Wednesday
Mostly cloudy through mid morning, then clearing, with a high near 89. Calm wind.
Wednesday Night
Mostly clear, with a low around 68. Calm wind.
Thursday
A 40 percent chance of showers and thunderstorms, mainly before 1pm. Partly sunny, with a high near 87. Calm wind becoming southwest around 6 mph in the morning.
Thursday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 70. Calm wind. Chance of precipitation is 60%.
Friday
A chance of showers and thunderstorms. Mostly cloudy, with a high near 87. Calm wind becoming south southwest around 5 mph in the afternoon.
Friday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 69. Calm wind.
Saturday
A chance of showers and thunderstorms, mainly before 1pm. Partly sunny, with a high near 88. Light south southwest wind.
Saturday Night
Mostly clear, with a low around 70. Light south wind.
Sunday
Mostly sunny, with a high near 91. Calm wind becoming south southwest 5 to 7 mph in the morning.
Sunday Night
Mostly clear, with a low around 72. South southwest wind 3 to 5 mph.
Monday
Mostly sunny, with a high near 92. South southwest wind 5 to 8 mph.
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
De Soto IL
37.81°N 89.23°W
37.81°N 89.23°W
5:01 pm CDT Aug 3, 2026
5pm CDT Aug 3, 2026-6pm CDT Aug 10, 2026
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