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Hazardous Weather Conditions

Current conditions at

Southern Illinois Airport (KMDH)

Lat: 37.78°NLon: 89.25°WElev: 400ft.

Fair

66°F

19°C

Humidity 68%
Wind Speed S 7 mph
Barometer 29.88 in (1011.4 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 20 Mar 11:52 pm CDT
Extended Forecast for

Alto Pass IL

  • Overnight

    Overnight: Partly cloudy, with a low around 56. Southwest wind 3 to 6 mph.

    Low: 56 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 81. Light and variable wind becoming west southwest around 6 mph in the morning.

    High: 81 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 62. South southwest wind 6 to 9 mph.

    Low: 62 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 83. South southwest wind 10 to 14 mph, with gusts as high as 23 mph.

    High: 83 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 42. West southwest wind 13 to 15 mph becoming north after midnight. Winds could gust as high as 24 mph.

    Low: 42 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 58. North northeast wind 9 to 13 mph, with gusts as high as 22 mph.

    High: 58 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 40. East northeast wind 5 to 7 mph.

    Low: 40 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 59. South southeast wind around 5 mph.

    High: 59 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: A slight chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 44. Southeast wind 3 to 5 mph.

    Low: 44 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

Detailed Forecast

Overnight
Partly cloudy, with a low around 56. Southwest wind 3 to 6 mph.
Saturday
Sunny, with a high near 81. Light and variable wind becoming west southwest around 6 mph in the morning.
Saturday Night
Mostly clear, with a low around 62. South southwest wind 6 to 9 mph.
Sunday
Sunny, with a high near 83. South southwest wind 10 to 14 mph, with gusts as high as 23 mph.
Sunday Night
Partly cloudy, with a low around 42. West southwest wind 13 to 15 mph becoming north after midnight. Winds could gust as high as 24 mph.
Monday
Sunny, with a high near 58. North northeast wind 9 to 13 mph, with gusts as high as 22 mph.
Monday Night
Partly cloudy, with a low around 40. East northeast wind 5 to 7 mph.
Tuesday
Mostly cloudy, with a high near 59. South southeast wind around 5 mph.
Tuesday Night
A slight chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 44. Southeast wind 3 to 5 mph.
Wednesday
Partly sunny, with a high near 68. Northeast wind 6 to 9 mph becoming south in the afternoon.
Wednesday Night
Partly cloudy, with a low around 51. South southeast wind 6 to 9 mph.
Thursday
Sunny, with a high near 77. South southwest wind 10 to 14 mph, with gusts as high as 24 mph.
Thursday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 44. Southwest wind around 14 mph becoming north after midnight. Winds could gust as high as 23 mph.
Friday
A chance of showers. Mostly cloudy, with a high near 55. North wind 11 to 13 mph, with gusts as high as 22 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Alto Pass IL
 37.57°N 89.32°W
Last Update:
11:31 pm CDT Mar 20, 2026
Forecast Valid:
12am CDT Mar 21, 2026-6pm CDT Mar 27, 2026
 
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Additional Resources

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High Temperature

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Chance of Precipitation