Current conditions at
Southern Illinois Airport (KMDH)
Lat: 37.78°NLon: 89.25°WElev: 400ft.
Fair
39°F
4°C
| Humidity | 96% |
| Wind Speed | S 3 mph |
| Barometer | 30.23 in (1023.5 mb) |
| Dewpoint | 38°F (3°C) |
| Visibility | 10.00 mi |
| Last update | 6 Nov 2:52 am CST |
Extended Forecast for
Grand Tower IL
Overnight
Low: 44 °F
Clear
Thursday
High: 66 °F
Sunny
Thursday Night
Low: 57 °F
Partly Cloudy
Friday
High: 72 °F
Decreasing
CloudsFriday Night
Low: 44 °F
Mostly Clear
Saturday
High: 69 °F
Mostly Sunny
Saturday Night
Low: 36 °F
Slight Chance
Showers then
Mostly CloudySunday
High: 44 °F
Mostly Sunny
Sunday Night
Low: 23 °F
Mostly Clear
Detailed Forecast
Overnight
Clear, with a steady temperature around 44. Light northeast wind.
Thursday
Sunny, with a high near 66. Light and variable wind becoming southeast 5 to 9 mph in the morning.
Thursday Night
Partly cloudy, with a steady temperature around 57. South southwest wind 6 to 11 mph, with gusts as high as 23 mph.
Friday
Mostly cloudy, then gradually becoming sunny, with a high near 72. South southwest wind 5 to 11 mph becoming west in the afternoon. Winds could gust as high as 22 mph.
Friday Night
Mostly clear, with a low around 44. Light west wind.
Saturday
Mostly sunny, with a high near 69. Calm wind becoming south southwest 5 to 9 mph in the morning.
Saturday Night
A 20 percent chance of showers before midnight. Mostly cloudy, with a low around 36. Southwest wind 8 to 14 mph becoming north northwest after midnight. Winds could gust as high as 20 mph.
Sunday
Mostly sunny, with a high near 44. North northwest wind 11 to 16 mph, with gusts as high as 26 mph.
Sunday Night
Mostly clear, with a low around 23. Northwest wind 8 to 10 mph, with gusts as high as 18 mph.
Monday
Sunny, with a high near 43. Northwest wind 6 to 10 mph.
Monday Night
Mostly clear, with a low around 26. Calm wind becoming south southwest around 6 mph after midnight.
Veterans Day
Mostly sunny, with a high near 55. South southwest wind 7 to 14 mph, with gusts as high as 25 mph.
Tuesday Night
Partly cloudy, with a low around 39. Southwest wind 8 to 13 mph, with gusts as high as 22 mph.
Wednesday
Sunny, with a high near 63. West southwest wind 6 to 9 mph.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast AreaABOUT THIS FORECAST
Point Forecast:
Grand Tower IL
37.64°N 89.52°W
37.64°N 89.52°W
3:16 am CST Nov 6, 2025
3am CST Nov 6, 2025-6pm CST Nov 12, 2025
Additional Resources
Radar & Satellite Image
Hourly Weather Forecast
