Current conditions at
Southern Illinois Airport (KMDH)
Lat: 37.78°NLon: 89.25°WElev: 400ft.
Mostly Cloudy
29°F
-2°C
| Humidity | 47% |
| Wind Speed | NW 6 G 17 mph |
| Barometer | 30.52 in (1033.9 mb) |
| Dewpoint | 11°F (-12°C) |
| Visibility | 10.00 mi |
| Wind Chill | 23°F (-5°C) |
| Last update | 23 Feb 1:52 pm CST |
Extended Forecast for
Alto Pass IL
This Afternoon
High: 31 °F
Sunny
Tonight
Low: 20 °F
Mostly Clear
Tuesday
High: 48 °F
Partly Sunny
and BreezyTuesday Night
Low: 40 °F
Mostly Cloudy
Wednesday
High: 56 °F
Partly Sunny
Wednesday Night
Low: 40 °F
Slight Chance
Showers then
Chance
ShowersThursday
High: 52 °F
Chance
Showers then
Mostly SunnyThursday Night
Low: 33 °F
Mostly Clear
Friday
High: 59 °F
Sunny
Detailed Forecast
This Afternoon
Sunny, with a high near 31. North northwest wind 7 to 10 mph, with gusts as high as 18 mph.
Tonight
Mostly clear, with a low around 20. Calm wind becoming south around 6 mph after midnight.
Tuesday
Partly sunny, with a high near 48. Breezy, with a south southwest wind 7 to 12 mph increasing to 17 to 22 mph in the afternoon. Winds could gust as high as 37 mph.
Tuesday Night
Mostly cloudy, with a low around 40. Southwest wind 13 to 18 mph decreasing to 6 to 11 mph after midnight. Winds could gust as high as 30 mph.
Wednesday
Partly sunny, with a high near 56. Southwest wind around 6 mph becoming southeast in the afternoon.
Wednesday Night
A 50 percent chance of showers, mainly after midnight. Mostly cloudy, with a low around 40. East southeast wind 6 to 8 mph becoming north northeast after midnight.
Thursday
A 50 percent chance of showers before noon. Partly sunny, with a high near 52. North northwest wind around 9 mph.
Thursday Night
Mostly clear, with a low around 33. North 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 39. South wind around 7 mph.
Saturday
Sunny, with a high near 65. South southwest wind 6 to 9 mph.
Saturday Night
Partly cloudy, with a low around 37. South wind around 9 mph becoming north after midnight.
Sunday
A chance of showers. Partly sunny, with a high near 52. East northeast wind around 10 mph, with gusts as high as 18 mph.
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
Alto Pass IL
37.57°N 89.32°W
37.57°N 89.32°W
12:46 pm CST Feb 23, 2026
2pm CST Feb 23, 2026-6pm CST Mar 1, 2026
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