Hazardous Weather Conditions
Current conditions at
Southern Illinois Airport (KMDH)
Lat: 37.78°NLon: 89.25°WElev: 400ft.
Fair
77°F
25°C
| Humidity | 85% |
| Wind Speed | N 6 mph |
| Barometer | 30.04 in (1016.7 mb) |
| Dewpoint | 72°F (22°C) |
| Visibility | 10.00 mi |
| Heat Index | 78°F (26°C) |
| Last update | 14 Oct 4:52 pm CDT |
Extended Forecast for
Alto Pass IL
This Afternoon
High: 77 °F
Chance
T-stormsTonight
Low: 67 °F
Chance
T-stormsThursday
High: 86 °F
Chance
Showers then
SunnyThursday Night
Low: 54 °F
Slight Chance
T-storms then
Chance
ShowersFriday
High: 58 °F
Mostly Cloudy
then Partly
Sunny and
BreezyFriday Night
Low: 44 °F
Partly Cloudy
Saturday
High: 60 °F
Sunny
Saturday Night
Low: 38 °F
Clear
Sunday
High: 65 °F
Sunny
Detailed Forecast
This Afternoon
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a steady temperature around 77. Calm wind.
Tonight
A chance of showers and thunderstorms before midnight, then a chance of showers between midnight and 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 67. Calm wind. Chance of precipitation is 40%.
Thursday
A chance of showers and thunderstorms before 11am, then a chance of showers between 11am and noon. Mostly cloudy through mid morning, then gradual clearing, with a high near 86. Light and variable wind becoming south southwest 6 to 11 mph in the morning. Winds could gust as high as 18 mph. Chance of precipitation is 40%.
Thursday Night
A slight chance of showers and thunderstorms, then a chance of showers after 3am. Increasing clouds, with a low around 54. South southwest wind 6 to 15 mph becoming northwest after midnight. Winds could gust as high as 21 mph. Chance of precipitation is 30%.
Friday
Partly sunny, with a high near 58. Breezy, with a north northwest wind 16 to 20 mph, with gusts as high as 28 mph.
Friday Night
Partly cloudy, with a low around 44. North wind 10 to 15 mph, with gusts as high as 23 mph.
Saturday
Sunny, with a high near 60. North wind 7 to 10 mph.
Saturday Night
Clear, with a low around 38. Calm wind.
Sunday
Sunny, with a high near 65. Calm wind becoming southeast around 5 mph in the morning.
Sunday Night
Mostly clear, with a low around 43. Calm wind.
Monday
Mostly sunny, with a high near 69. Calm wind becoming south around 5 mph in the afternoon.
Monday Night
Partly cloudy, with a low around 47. Calm wind.
Tuesday
Mostly sunny, with a high near 73. Light southeast wind.
Tuesday Night
Mostly clear, with a low around 51. Calm wind.
Wednesday
Sunny, with a high near 77. Calm wind becoming south around 5 mph in the afternoon.
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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
5:06 pm CDT Oct 14, 2026
5pm CDT Oct 14, 2026-6pm CDT Oct 21, 2026
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