Hazardous Weather Conditions
Current conditions at
Southern Illinois Airport (KMDH)
Lat: 37.78°NLon: 89.25°WElev: 400ft.
Fair
36°F
2°C
| Humidity | 97% |
| Wind Speed | Calm |
| Barometer | 30.48 in (1032.4 mb) |
| Dewpoint | 35°F (2°C) |
| Visibility | 10.00 mi |
| Last update | 18 Oct 4:52 am CDT |
Extended Forecast for
Grand Tower IL
Frost Advisory until October 18, 08:00am
NOW until 8:00am Sun
Frost Advisory
Overnight
Low: 34 °F
Clear
Sunday
High: 70 °F
Frost then
SunnySunday Night
Low: 39 °F
Clear
Monday
High: 74 °F
Sunny
Monday Night
Low: 40 °F
Mostly Clear
Tuesday
High: 76 °F
Sunny
Tuesday Night
Low: 42 °F
Mostly Clear
Wednesday
High: 78 °F
Sunny
Detailed Forecast
Overnight
Clear, with a low around 34. Calm wind.
Sunday
Widespread frost, mainly between 7am and 8am. Otherwise, sunny, with a high near 70. Light south southeast wind.
Sunday Night
Clear, with a low around 39. Calm wind.
Monday
Sunny, with a high near 74. Calm wind.
Monday Night
Mostly clear, with a low around 40. Calm wind.
Tuesday
Sunny, with a high near 76. Calm wind.
Tuesday Night
Mostly clear, with a low around 42. Calm wind.
Wednesday
Sunny, with a high near 78. Calm wind.
Wednesday Night
Clear, with a low around 43. Calm wind.
Thursday
Sunny, with a high near 79. Calm wind.
Thursday Night
Clear, with a low around 45. Calm wind.
Friday
Sunny, with a high near 80. Light east wind.
Friday Night
Mostly clear, with a low around 46. Calm wind.
Saturday
Sunny, with a high near 80. Light south southeast wind.
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
4:46 am CDT Oct 18, 2026
5am CDT Oct 18, 2026-6pm CDT Oct 24, 2026
Additional Resources
Radar & Satellite Image
Hourly Weather Forecast
