Current conditions at
Southern Illinois Airport (KMDH)
Lat: 37.78°NLon: 89.25°WElev: 400ft.
Fair
45°F
7°C
| Humidity | 100% |
| Wind Speed | SW 3 mph |
| Barometer | 29.88 in (1011.8 mb) |
| Dewpoint | 45°F (7°C) |
| Visibility | 10.00 mi |
| Last update | 5 Nov 4:52 am CST |
Extended Forecast for
4 Miles WNW Alto Pass IL
Today
High: 66 °F
Patchy Fog
then SunnyTonight
Low: 45 °F
Partly Cloudy
Friday
High: 56 °F
Decreasing
CloudsFriday Night
Low: 34 °F
Mostly Clear
Saturday
High: 54 °F
Sunny
Saturday Night
Low: 34 °F
Mostly Clear
Sunday
High: 58 °F
Sunny
Sunday Night
Low: 37 °F
Clear
Monday
High: 62 °F
Sunny
Detailed Forecast
Today
Patchy fog before 8am. Otherwise, sunny, with a high near 66. West wind 3 to 8 mph.
Tonight
Partly cloudy, with a low around 45. Northwest wind 3 to 5 mph.
Friday
Mostly cloudy, then gradually becoming sunny, with a high near 56. North wind 6 to 10 mph.
Friday Night
Mostly clear, with a low around 34. North wind around 6 mph becoming calm in the evening.
Saturday
Sunny, with a high near 54. Light north wind.
Saturday Night
Mostly clear, with a low around 34. Calm wind.
Sunday
Sunny, with a high near 58. Light west northwest wind.
Sunday Night
Clear, with a low around 37. Calm wind.
Monday
Sunny, with a high near 62. Light and variable wind.
Monday Night
Clear, with a low around 41. Calm wind.
Tuesday
Sunny, with a high near 65. Light west wind.
Tuesday Night
Mostly clear, with a low around 43. Calm wind.
Veterans Day
Mostly sunny, with a high near 65. Calm wind becoming north northwest around 5 mph.
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
4 Miles WNW Alto Pass IL
37.59°N 89.38°W
37.59°N 89.38°W
1:41 am CST Nov 5, 2026
5am CST Nov 5, 2026-6pm CST Nov 11, 2026
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