Current conditions at
Southern Illinois Airport (KMDH)
Lat: 37.78°NLon: 89.25°WElev: 400ft.
Fair
73°F
23°C
| Humidity | 89% |
| Wind Speed | Calm |
| Barometer | 30.01 in |
| Dewpoint | 70°F (21°C) |
| Visibility | 10.00 mi |
| Last update | 4 Aug 8:47 pm CDT |
Extended Forecast for
2 Miles NNE Grand Tower IL
Tonight
Low: 66 °F
Patchy Fog
Wednesday
High: 90 °F
Patchy Fog
then SunnyWednesday Night
Low: 71 °F
Mostly Clear
then Slight
Chance
ShowersThursday
High: 86 °F
Chance
T-stormsThursday Night
Low: 71 °F
Slight Chance
T-storms then
Showers
LikelyFriday
High: 87 °F
Showers
LikelyFriday Night
Low: 70 °F
Chance
T-stormsSaturday
High: 89 °F
Slight Chance
T-stormsSaturday Night
Low: 72 °F
Mostly Clear
Detailed Forecast
Tonight
Patchy fog after 5am. Otherwise, mostly clear, with a low around 66. Calm wind.
Wednesday
Patchy fog before 8am. Otherwise, sunny, with a high near 90. Calm wind becoming south southwest around 5 mph in the morning.
Wednesday Night
A 10 percent chance of showers after 5am. Partly cloudy, with a low around 71. Light south wind.
Thursday
A 50 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 86. Light south wind.
Thursday Night
A slight chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 71. Calm wind. Chance of precipitation is 60%.
Friday
Showers likely and possibly a thunderstorm before 1pm, then a slight chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 87. Calm wind becoming south southwest around 5 mph in the afternoon. Chance of precipitation is 60%.
Friday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 70. Light south southwest wind.
Saturday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 89. Light south southwest wind.
Saturday Night
Mostly clear, with a low around 72. Calm wind.
Sunday
Sunny, with a high near 91. South southwest wind 3 to 8 mph.
Sunday Night
Mostly clear, with a low around 74. South wind 5 to 7 mph.
Monday
Sunny, with a high near 94. South southwest wind 6 to 11 mph.
Monday Night
Mostly clear, with a low around 76. South wind 7 to 10 mph.
Tuesday
Sunny, with a high near 93. South southwest wind 6 to 8 mph.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast AreaABOUT THIS FORECAST
Point Forecast:
2 Miles NNE Grand Tower IL
37.66°N 89.49°W
37.66°N 89.49°W
8:46 pm CDT Aug 4, 2026
11pm CDT Aug 4, 2026-6pm CDT Aug 11, 2026
Additional Resources
Radar & Satellite Image
Hourly Weather Forecast
