Hazardous Weather Conditions
Current conditions at
Southern Illinois Airport (KMDH)
Lat: 37.78°NLon: 89.25°WElev: 400ft.
A Few Clouds
19°F
-7°C
| Humidity | 65% |
| Wind Speed | N 16 mph |
| Barometer | 30.49 in (1032.9 mb) |
| Dewpoint | 9°F (-13°C) |
| Visibility | 10.00 mi |
| Wind Chill | 4°F (-16°C) |
| Last update | 23 Feb 3:52 am CST |
Extended Forecast for
Grand Tower IL
Today
High: 34 °F
Sunny
Tonight
Low: 19 °F
Mostly Clear
Tuesday
High: 49 °F
Partly Sunny
and BreezyTuesday Night
Low: 37 °F
Mostly Cloudy
Wednesday
High: 56 °F
Partly Sunny
Wednesday Night
Low: 40 °F
Mostly Cloudy
then Showers
LikelyThursday
High: 53 °F
Chance
Showers then
Slight Chance
ShowersThursday Night
Low: 29 °F
Mostly Clear
Friday
High: 59 °F
Sunny
Detailed Forecast
Today
Sunny, with a high near 34. North northwest wind 6 to 14 mph, with gusts as high as 22 mph.
Tonight
Mostly clear, with a low around 19. Calm wind becoming south around 6 mph after midnight.
Tuesday
Partly sunny, with a high near 49. Breezy, with a south wind 9 to 14 mph increasing to 17 to 22 mph in the afternoon. Winds could gust as high as 33 mph.
Tuesday Night
Mostly cloudy, with a low around 37. South southwest wind 12 to 17 mph becoming light west after midnight. Winds could gust as high as 25 mph.
Wednesday
Partly sunny, with a high near 56. Light and variable wind becoming west northwest around 6 mph in the morning.
Wednesday Night
Showers likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 40. Southeast wind 5 to 7 mph. Chance of precipitation is 60%.
Thursday
A 50 percent chance of showers, mainly before noon. Partly sunny, with a high near 53. South southwest wind 7 to 10 mph becoming north northwest in the afternoon.
Thursday Night
Mostly clear, with a low around 29. North northwest wind 5 to 7 mph becoming calm in the evening.
Friday
Sunny, with a high near 59. Calm wind becoming south southwest 5 to 8 mph in the morning.
Friday Night
Clear, with a low around 38. South southwest wind around 6 mph.
Saturday
Sunny, with a high near 64. South wind 6 to 10 mph.
Saturday Night
A slight chance of showers. Mostly cloudy, with a low around 36. South wind around 9 mph becoming north after midnight.
Sunday
A chance of showers. Partly sunny, with a high near 54. North northeast wind 8 to 11 mph.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast AreaABOUT THIS FORECAST
Point Forecast:
Grand Tower IL
37.62°N 89.49°W
37.62°N 89.49°W
3:23 am CST Feb 23, 2026
4am CST Feb 23, 2026-6pm CST Mar 1, 2026
Additional Resources
Radar & Satellite Image
Hourly Weather Forecast
