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

73°F

23°C

Humidity 94%
Wind Speed SE 5 mph
Barometer 30.03 in (1016.3 mb)
Dewpoint 71°F (22°C)
Visibility 10.00 mi
Last update 18 Aug 4:53 am CDT
Extended Forecast for

5 Miles SE Martinsville IL

Heat Advisory August 18, 05:34am until August 18, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory August 18, 05:34am until August 18, 08:00pm

    NOW until 8:00pm Mon

    Heat Advisory

  • Today

    High: 90 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 73. Light east southeast wind.

    Low: 73 °F

    Mostly Clear

  • Tuesday

    Tuesday: A slight chance of showers, then a chance of showers and thunderstorms after 10am. Mostly sunny, with a high near 91. South southwest wind 3 to 6 mph. Chance of precipitation is 40%.

    High: 91 °F

    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 1am. Partly cloudy, with a low around 72. Calm wind becoming north around 5 mph after midnight. Chance of precipitation is 30%.

    Low: 72 °F

    Chance
    T-storms then
    Chance
    Showers

  • Wednesday

    Wednesday: Mostly sunny, with a high near 85. North wind 6 to 10 mph, with gusts as high as 15 mph.

    High: 85 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 66. North wind 7 to 10 mph, with gusts as high as 15 mph.

    Low: 66 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 84. North northeast wind 7 to 9 mph.

    High: 84 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 64.

    Low: 64 °F

    Mostly Clear

Detailed Forecast

Today
Mostly sunny, with a high near 90. East wind around 6 mph becoming south southeast in the afternoon.
Tonight
Mostly clear, with a low around 73. Light east southeast wind.
Tuesday
A slight chance of showers, then a chance of showers and thunderstorms after 10am. Mostly sunny, with a high near 91. South southwest wind 3 to 6 mph. Chance of precipitation is 40%.
Tuesday Night
A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 1am. Partly cloudy, with a low around 72. Calm wind becoming north around 5 mph after midnight. Chance of precipitation is 30%.
Wednesday
Mostly sunny, with a high near 85. North wind 6 to 10 mph, with gusts as high as 15 mph.
Wednesday Night
Mostly clear, with a low around 66. North wind 7 to 10 mph, with gusts as high as 15 mph.
Thursday
Sunny, with a high near 84. North northeast wind 7 to 9 mph.
Thursday Night
Mostly clear, with a low around 64.
Friday
Sunny, with a high near 86.
Friday Night
Mostly clear, with a low around 65.
Saturday
Sunny, with a high near 86.
Saturday Night
Mostly clear, with a low around 60.
Sunday
Sunny, with a high near 80.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles SE Martinsville IL
 39.27°N 87.83°W (Elev. 600 ft)
Last Update:
5:10 am CDT Aug 18, 2025
Forecast Valid:
5am CDT Aug 18, 2025-6pm CDT Aug 24, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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