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Hazardous Weather Conditions

Current conditions at

Southern Illinois Airport (KMDH)

Lat: 37.78°NLon: 89.25°WElev: 400ft.

Fair

89°F

32°C

Humidity 68%
Wind Speed S 15 G 26 mph
Barometer 29.97 in (1014.4 mb)
Dewpoint 77°F (25°C)
Visibility 10.00 mi
Heat Index102°F (39°C)
Last update 29 Jun 5:52 pm CDT
Extended Forecast for

2 Miles SW Alto Pass IL

Extreme Heat Warning June 29, 06:42pm until July 3, 08:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning June 29, 06:42pm until July 3, 08:00pm

    NOW until 8:00pm Fri

    Extreme Heat Warning

  • Tonight

    Low: 76 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 94. Heat index values as high as 106. South southwest wind 3 to 7 mph.

    High: 94 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 75. South southwest wind around 6 mph becoming calm in the evening.

    Low: 75 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 94. Heat index values as high as 105. Calm wind becoming south around 6 mph in the afternoon.

    High: 94 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 77. South wind around 5 mph becoming calm in the evening.

    Low: 77 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 94. Calm wind becoming south around 5 mph in the afternoon.

    High: 94 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 76. Light south southeast wind.

    Low: 76 °F

    Mostly Clear

  • Friday

    Friday: A slight chance of showers and thunderstorms. Sunny, with a high near 92. Calm wind becoming south around 5 mph in the afternoon.

    High: 92 °F

    Slight Chance
    T-storms

Detailed Forecast

Tonight
Mostly clear, with a low around 76. South wind 5 to 7 mph.
Tuesday
Sunny, with a high near 94. Heat index values as high as 106. South southwest wind 3 to 7 mph.
Tuesday Night
Clear, with a low around 75. South southwest wind around 6 mph becoming calm in the evening.
Wednesday
Sunny, with a high near 94. Heat index values as high as 105. Calm wind becoming south around 6 mph in the afternoon.
Wednesday Night
Mostly clear, with a low around 77. South wind around 5 mph becoming calm in the evening.
Thursday
Sunny, with a high near 94. Calm wind becoming south around 5 mph in the afternoon.
Thursday Night
Mostly clear, with a low around 76. Light south southeast wind.
Friday
A slight chance of showers and thunderstorms. Sunny, with a high near 92. Calm wind becoming south around 5 mph in the afternoon.
Friday Night
Mostly clear, with a low around 76. Light south wind.
Independence Day
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 92. Light south southwest wind.
Saturday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 75. Calm wind.
Sunday
A chance of showers and thunderstorms. Mostly sunny, with a high near 91. Light south southwest wind.
Sunday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 75. Light west southwest wind.
Monday
A chance of showers and thunderstorms. Mostly sunny, with a high near 89. Calm wind becoming west around 5 mph in the afternoon.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SW Alto Pass IL
 37.55°N 89.35°W
Last Update:
6:01 pm CDT Jun 29, 2026
Forecast Valid:
6pm CDT Jun 29, 2026-6pm CDT Jul 6, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation