Hazardous Weather Conditions
Current conditions at
Southern Illinois Airport (KMDH)
Lat: 37.78°NLon: 89.25°WElev: 400ft.
Overcast
42°F
6°C
| Humidity | 79% |
| Wind Speed | SW 14 G 24 mph |
| Barometer | 29.69 in (1005.7 mb) |
| Dewpoint | 36°F (2°C) |
| Visibility | 10.00 mi |
| Wind Chill | 35°F (2°C) |
| Last update | 10 Dec 2:52 am CST |
Extended Forecast for
Grand Tower IL
Overnight
Low: 43 °F
Cloudy
Wednesday
High: 46 °F⇓
Decreasing
Clouds and
BreezyWednesday Night
Low: 25 °F
Mostly Cloudy
Thursday
High: 40 °F
Partly Sunny
Thursday Night
Low: 35 °F
Mostly Cloudy
Friday
High: 47 °F
Mostly Sunny
Friday Night
Low: 21 °F
Mostly Cloudy
Saturday
High: 39 °F
Partly Sunny
Saturday Night
Low: 12 °F
Mostly Cloudy
Detailed Forecast
Overnight
Cloudy, with a steady temperature around 43. Southwest wind around 15 mph, with gusts as high as 26 mph.
Wednesday
Cloudy, then gradually becoming mostly sunny, with a temperature rising to near 46 by 9am, then falling to around 38 during the remainder of the day. Breezy, with a west southwest wind 11 to 20 mph becoming northwest in the afternoon. Winds could gust as high as 39 mph.
Wednesday Night
Mostly cloudy, with a low around 25. Northwest wind 5 to 8 mph becoming calm after midnight.
Thursday
Partly sunny, with a high near 40. Calm wind becoming south around 6 mph in the afternoon.
Thursday Night
Mostly cloudy, with a low around 35. South southwest wind 6 to 8 mph.
Friday
Mostly sunny, with a high near 47. Southwest wind 6 to 11 mph becoming north northwest in the afternoon. Winds could gust as high as 18 mph.
Friday Night
Mostly cloudy, with a low around 21. North northwest wind 3 to 8 mph.
Saturday
Partly sunny, with a high near 39. North wind 3 to 6 mph.
Saturday Night
Mostly cloudy, with a low around 12. North wind 6 to 9 mph.
Sunday
Sunny, with a high near 27. North wind 7 to 9 mph.
Sunday Night
Mostly clear, with a low around 13. North northeast wind around 6 mph becoming calm in the evening.
Monday
Mostly sunny, with a high near 37. South wind 3 to 8 mph.
Monday Night
A slight chance of showers. Mostly cloudy, with a low around 27. South southwest wind around 6 mph.
Tuesday
Mostly cloudy, with a high near 46. South wind 5 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 89.52°W
37.64°N 89.52°W
3:16 am CST Dec 10, 2025
3am CST Dec 10, 2025-6pm CST Dec 16, 2025
Additional Resources
Radar & Satellite Image
Hourly Weather Forecast
