Hazardous Weather Conditions
Current conditions at
Southern Illinois Airport (KMDH)
Lat: 37.78°NLon: 89.25°WElev: 400ft.
Fair
57°F
14°C
| Humidity | 83% |
| Wind Speed | N 9 mph |
| Barometer | 29.90 in (1012.5 mb) |
| Dewpoint | 52°F (11°C) |
| Visibility | 10.00 mi |
| Last update | 26 Dec 7:52 pm CST |
Extended Forecast for
Grand Tower IL
Tonight
Low: 48 °F
Partly Cloudy
then Patchy
FogSaturday
High: 68 °F
Areas Fog
then Mostly
CloudySaturday Night

Low: 61 °F
Mostly Cloudy
Sunday
High: 71 °F
Slight Chance
Showers then
Chance
ShowersSunday Night
Low: 24 °F
Blustery.
Showers then
Chance
Rain/SnowMonday

High: 30 °F
Sunny
Monday Night

Low: 19 °F
Mostly Clear
Tuesday

High: 37 °F
Sunny
Tuesday Night

Low: 26 °F
Mostly Clear
Detailed Forecast
Tonight
Patchy fog after 1am. Otherwise, mostly cloudy, with a low around 48. North wind around 5 mph becoming calm in the evening.
Saturday
Areas of fog before 9am. Otherwise, partly sunny, with a high near 68. Calm wind becoming south southeast 5 to 9 mph in the morning.
Saturday Night
Mostly cloudy, with a low around 61. South wind 9 to 11 mph, with gusts as high as 18 mph.
Sunday
A chance of showers, with thunderstorms also possible after 3pm. Cloudy, with a high near 71. South southwest wind 11 to 16 mph, with gusts as high as 26 mph. Chance of precipitation is 50%.
Sunday Night
Rain showers before midnight, then a chance of rain and snow showers. Some thunder is also possible. Low around 24. Blustery, with a southwest wind 17 to 20 mph becoming northwest in the evening. Winds could gust as high as 29 mph. Chance of precipitation is 80%.
Monday
Sunny, with a high near 30. Northwest wind 14 to 18 mph, with gusts as high as 29 mph.
Monday Night
Mostly clear, with a low around 19. Northwest wind 8 to 13 mph, with gusts as high as 20 mph.
Tuesday
Sunny, with a high near 37. Northwest wind 6 to 8 mph becoming west southwest in the afternoon.
Tuesday Night
Mostly clear, with a low around 26. Southwest wind around 5 mph.
Wednesday
Partly sunny, with a high near 44. West northwest wind 5 to 8 mph.
Wednesday Night
Partly cloudy, with a low around 23. Northwest wind around 6 mph.
New Year's Day
Mostly sunny, with a high near 33. North northwest wind around 7 mph.
Thursday Night
Mostly cloudy, with a low around 17. North wind 3 to 5 mph.
Friday
Mostly sunny, with a high near 32. Light and variable wind becoming east northeast around 6 mph in the morning.
Basemap Options
Click map to change the forecast location
Loading map...
ABOUT THIS FORECAST
Point Forecast:
Grand Tower IL
37.64°N 89.52°W
37.64°N 89.52°W
6:36 pm CST Dec 26, 2025
8pm CST Dec 26, 2025-6pm CST Jan 2, 2026



