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

Hazardous Weather Conditions

Current conditions at

Mattoon / Charleston, Coles County Memorial Airport (KMTO)

Lat: 39.48°NLon: 88.28°WElev: 722ft.

Fair

95°F

35°C

Humidity 44%
Wind Speed Vrbl 5 mph
Barometer 29.98 in (1014.4 mb)
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Heat Index101°F (38°C)
Last update 3 Sep 1:53 pm CDT
Extended Forecast for

Arthur IL

Extreme Heat Warning September 3, 02:08pm until September 4, 07:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning September 3, 02:08pm until September 4, 07:00pm

    NOW until 7:00pm Fri

    Extreme Heat Warning

  • This Afternoon

    High: 97 °F

    Hot

  • Tonight

    Tonight: Clear, with a low around 74. South wind 3 to 6 mph.

    Low: 74 °F

    Clear

  • Friday

    Friday: Sunny and hot, with a high near 98. Heat index values as high as 103. West southwest wind 5 to 7 mph.

    High: 98 °F

    Hot

  • Friday Night

    Friday Night: Increasing clouds, with a low around 73. Light south southwest wind.

    Low: 73 °F

    Increasing
    Clouds

  • Saturday

    Saturday: Sunny and hot, with a high near 95. Light and variable wind becoming northwest 5 to 7 mph in the afternoon.

    High: 95 °F

    Hot

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 67. East northeast wind around 7 mph.

    Low: 67 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 86. East northeast wind 7 to 11 mph, with gusts as high as 16 mph.

    High: 86 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 61.

    Low: 61 °F

    Mostly Clear

Detailed Forecast

This Afternoon
Sunny and hot, with a high near 97. Heat index values as high as 101. Southwest wind around 8 mph.
Tonight
Clear, with a low around 74. South wind 3 to 6 mph.
Friday
Sunny and hot, with a high near 98. Heat index values as high as 103. West southwest wind 5 to 7 mph.
Friday Night
Increasing clouds, with a low around 73. Light south southwest wind.
Saturday
Sunny and hot, with a high near 95. Light and variable wind becoming northwest 5 to 7 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 67. East northeast wind around 7 mph.
Sunday
Sunny, with a high near 86. East northeast wind 7 to 11 mph, with gusts as high as 16 mph.
Sunday Night
Mostly clear, with a low around 61.
Labor Day
Sunny, with a high near 86.
Monday Night
Mostly clear, with a low around 63.
Tuesday
Mostly sunny, with a high near 93.
Tuesday Night
Mostly clear, with a low around 72.
Wednesday
Sunny and hot, with a high near 96.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Arthur IL
 39.71°N 88.46°W (Elev. 663 ft)
Last Update:
1:56 pm CDT Sep 3, 2026
Forecast Valid:
2pm CDT Sep 3, 2026-6pm CDT Sep 9, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation