Current conditions at
Southern Illinois Airport (KMDH)
Lat: 37.78°NLon: 89.25°WElev: 400ft.
Fair
75°F
24°C
| Humidity | 78% |
| Wind Speed | NW 7 mph |
| Barometer | 30.02 in |
| Dewpoint | 68°F (20°C) |
| Visibility | 10.00 mi |
| Last update | 27 Aug 8:55 am CDT |
Extended Forecast for
Grand Tower IL
Today
High: 88 °F
Sunny
Tonight
Low: 65 °F
Mostly Clear
Friday
High: 87 °F
Sunny
Friday Night
Low: 62 °F
Mostly Clear
Saturday
High: 89 °F
Sunny
Saturday Night
Low: 65 °F
Mostly Clear
Sunday
High: 93 °F
Sunny
Sunday Night
Low: 71 °F
Mostly Clear
Monday
High: 94 °F
Sunny
Detailed Forecast
Today
Sunny, with a high near 88. Calm wind becoming north 5 to 7 mph in the afternoon.
Tonight
Mostly clear, with a low around 65. North wind around 5 mph becoming calm in the evening.
Friday
Sunny, with a high near 87. Calm wind becoming north around 5 mph in the afternoon.
Friday Night
Mostly clear, with a low around 62. Calm wind.
Saturday
Sunny, with a high near 89. Calm wind.
Saturday Night
Mostly clear, with a low around 65. Calm wind.
Sunday
Sunny, with a high near 93. Calm wind becoming south southwest 5 to 9 mph in the morning.
Sunday Night
Mostly clear, with a low around 71. South wind 3 to 5 mph.
Monday
Sunny, with a high near 94. South wind 5 to 10 mph.
Monday Night
Mostly clear, with a low around 73. South wind 3 to 6 mph.
Tuesday
Sunny, with a high near 95. Southwest wind 3 to 8 mph.
Tuesday Night
Mostly clear, with a low around 74. South southwest wind 3 to 5 mph.
Wednesday
Sunny, with a high near 96. Southwest wind 3 to 7 mph.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast AreaABOUT THIS FORECAST
Point Forecast:
Grand Tower IL
37.64°N 89.49°W
37.64°N 89.49°W
8:56 am CDT Aug 27, 2026
9am CDT Aug 27, 2026-6pm CDT Sep 2, 2026
Additional Resources
Radar & Satellite Image
Hourly Weather Forecast
