National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Southern Illinois Airport (KMDH)

Lat: 37.78°NLon: 89.25°WElev: 400ft.

Fog/Mist

31°F

-1°C

Humidity 100%
Wind Speed Calm
Barometer 30.23 in (1023.9 mb)
Dewpoint 31°F (-1°C)
Visibility 3.00 mi
Last update 7 Nov 5:52 am CST
Extended Forecast for

3 Miles SSW Alto Pass IL

Freeze Warning November 7, 11:00pm until November 8, 08:00am
Freeze Warning November 7, 06:44am until November 7, 08:00am
Click here for hazard details and duration
Freeze Warning
...
  •  
    Freeze Warning November 7, 06:44am until November 7, 08:00am

    NOW until 8:00am Sat

    Freeze Warning

  • Today

    High: 55 °F

    Frost then
    Mostly Sunny

  • Tonight

    Tonight: Areas of frost after 1am. Otherwise, mostly cloudy, then gradually becoming clear, with a low around 33. Calm wind.

    Low: 33 °F

    Decreasing
    Clouds then
    Areas Frost

  • Sunday

    Sunday: Widespread frost, mainly before 7am. Otherwise, sunny, with a high near 63. Calm wind becoming west southwest around 5 mph.

    High: 63 °F

    Frost then
    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 40. Calm wind.

    Low: 40 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 68. Light and variable wind.

    High: 68 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 43. Calm wind.

    Low: 43 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 70. Calm wind becoming west southwest around 5 mph.

    High: 70 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 46. Calm wind.

    Low: 46 °F

    Mostly Clear

Detailed Forecast

Today
Widespread frost, mainly between 7am and 8am. Otherwise, mostly sunny, with a high near 55. Light north wind.
Tonight
Areas of frost after 1am. Otherwise, mostly cloudy, then gradually becoming clear, with a low around 33. Calm wind.
Sunday
Widespread frost, mainly before 7am. Otherwise, sunny, with a high near 63. Calm wind becoming west southwest around 5 mph.
Sunday Night
Clear, with a low around 40. Calm wind.
Monday
Sunny, with a high near 68. Light and variable wind.
Monday Night
Clear, with a low around 43. Calm wind.
Tuesday
Sunny, with a high near 70. Calm wind becoming west southwest around 5 mph.
Tuesday Night
Mostly clear, with a low around 46. Calm wind.
Veterans Day
Mostly sunny, with a high near 68. Calm wind becoming west northwest around 6 mph.
Wednesday Night
A slight chance of showers. Partly cloudy, with a low around 44. Light north northwest wind.
Thursday
Mostly sunny, with a high near 58. North northwest wind 5 to 11 mph, with gusts as high as 18 mph.
Thursday Night
Partly cloudy, with a low around 36. North wind 3 to 6 mph.
Friday
Mostly sunny, with a high near 52. North northwest wind 5 to 9 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SSW Alto Pass IL
 37.53°N 89.35°W
Last Update:
4:41 am CST Nov 7, 2026
Forecast Valid:
6am CST Nov 7, 2026-6pm CST Nov 13, 2026
 
Forecast Discussion
 
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Additional Resources

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