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

Southern Illinois Airport (KMDH)

Lat: 37.78°NLon: 89.25°WElev: 400ft.

Fair

72°F

22°C

Humidity 41%
Wind Speed SE 10 mph
Barometer 30.12 in
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Last update 6 Oct 11:46 am CDT
Extended Forecast for

Coello IL

  • This Afternoon

    This Afternoon: Sunny, with a high near 78. Southeast wind 3 to 6 mph.

    High: 78 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 50. Calm wind.

    Low: 50 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 87. Calm wind becoming west southwest 5 to 8 mph in the morning.

    High: 87 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 56. Southwest wind around 5 mph becoming calm in the evening.

    Low: 56 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 83. Calm wind becoming northeast 5 to 8 mph in the morning.

    High: 83 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 52. North northeast wind 3 to 5 mph.

    Low: 52 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 82. East southeast wind 3 to 7 mph.

    High: 82 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 53. East southeast wind around 5 mph becoming calm in the evening.

    Low: 53 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 85. Light southeast wind becoming south southeast 6 to 11 mph in the morning.

    High: 85 °F

    Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 78. Southeast wind 3 to 6 mph.
Tonight
Clear, with a low around 50. Calm wind.
Wednesday
Sunny, with a high near 87. Calm wind becoming west southwest 5 to 8 mph in the morning.
Wednesday Night
Clear, with a low around 56. Southwest wind around 5 mph becoming calm in the evening.
Thursday
Sunny, with a high near 83. Calm wind becoming northeast 5 to 8 mph in the morning.
Thursday Night
Mostly clear, with a low around 52. North northeast wind 3 to 5 mph.
Friday
Sunny, with a high near 82. East southeast wind 3 to 7 mph.
Friday Night
Clear, with a low around 53. East southeast wind around 5 mph becoming calm in the evening.
Saturday
Sunny, with a high near 85. Light southeast wind becoming south southeast 6 to 11 mph in the morning.
Saturday Night
A slight chance of showers. Partly cloudy, with a low around 58. East southeast wind around 6 mph.
Sunday
A slight chance of showers. Mostly sunny, with a high near 78. Light east wind becoming northeast 5 to 10 mph in the morning.
Sunday Night
Partly cloudy, with a low around 58. Light south wind.
Columbus Day
Mostly sunny, with a high near 85. Calm wind becoming south southwest 5 to 8 mph in the morning.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Coello IL
 38.03°N 89.1°W
Last Update:
5:21 am CDT Oct 6, 2026
Forecast Valid:
12pm CDT Oct 6, 2026-6pm CDT Oct 12, 2026
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation