Current conditions at
Southern Illinois Airport (KMDH)
Lat: 37.78°NLon: 89.25°WElev: 400ft.
Fair
49°F
9°C
| Humidity | 64% |
| Wind Speed | Calm |
| Barometer | 30.06 in (1017.7 mb) |
| Dewpoint | 37°F (3°C) |
| Visibility | 10.00 mi |
| Last update | 19 Mar 5:52 am CDT |
Extended Forecast for
Alto Pass IL
Today
High: 71 °F
Mostly Sunny
Tonight
Low: 52 °F
Mostly Clear
Friday
High: 78 °F
Sunny
Friday Night
Low: 54 °F
Partly Cloudy
Saturday
High: 79 °F
Sunny
Saturday Night
Low: 57 °F
Clear
Sunday
High: 83 °F
Sunny
Sunday Night
Low: 43 °F
Partly Cloudy
Monday
High: 56 °F
Sunny
Detailed Forecast
Today
Mostly sunny, with a high near 71. South southwest wind 5 to 7 mph.
Tonight
Mostly clear, with a low around 52. South wind around 6 mph.
Friday
Sunny, with a high near 78. Southwest wind 6 to 8 mph.
Friday Night
Partly cloudy, with a low around 54. West wind around 6 mph.
Saturday
Sunny, with a high near 79. North northwest wind 3 to 5 mph.
Saturday Night
Clear, with a low around 57. South wind 3 to 7 mph.
Sunday
Sunny, with a high near 83. South southwest wind 8 to 13 mph, with gusts as high as 23 mph.
Sunday Night
Partly cloudy, with a low around 43. West southwest wind around 14 mph becoming north after midnight. Winds could gust as high as 24 mph.
Monday
Sunny, with a high near 56. North wind 9 to 13 mph, with gusts as high as 22 mph.
Monday Night
Partly cloudy, with a low around 36. North northeast wind 5 to 7 mph.
Tuesday
Partly sunny, with a high near 59. East southeast wind around 6 mph.
Tuesday Night
Mostly cloudy, with a low around 41. East wind 3 to 5 mph.
Wednesday
Mostly sunny, with a high near 69. East wind 6 to 10 mph becoming south in the afternoon.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast AreaABOUT THIS FORECAST
Point Forecast:
Alto Pass IL
37.57°N 89.32°W
37.57°N 89.32°W
4:46 am CDT Mar 19, 2026
6am CDT Mar 19, 2026-6pm CDT Mar 25, 2026
Additional Resources
Radar & Satellite Image
Hourly Weather Forecast
