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

75°F

24°C

Humidity 94%
Wind Speed SE 6 mph
Barometer 30.03 in (1016.2 mb)
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Last update 18 Aug 2:53 am CDT
Extended Forecast for

3 Miles S Martinsville IL

Heat Advisory August 18, 03:47am until August 18, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory August 18, 03:47am until August 18, 08:00pm

    NOW until 8:00pm Mon

    Heat Advisory

  • Overnight

    Low: 73 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 91. South southeast wind around 6 mph.

    High: 91 °F

    Mostly Sunny

  • Monday Night

    Monday Night: A 20 percent chance of showers and thunderstorms after 4am. Mostly clear, with a low around 73. Light east southeast wind.

    Low: 73 °F

    Mostly Clear
    then Slight
    Chance
    T-storms

  • Tuesday

    Tuesday: A 40 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 90. Light and variable wind becoming south southwest around 6 mph in the morning.

    High: 90 °F

    Mostly Sunny
    then 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 northeast 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 9 mph, with gusts as high as 15 mph.

    Low: 66 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 85.

    High: 85 °F

    Sunny

Detailed Forecast

Overnight
Partly cloudy, with a low around 73. Light east wind.
Monday
Mostly sunny, with a high near 91. South southeast wind around 6 mph.
Monday Night
A 20 percent chance of showers and thunderstorms after 4am. Mostly clear, with a low around 73. Light east southeast wind.
Tuesday
A 40 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 90. Light and variable wind becoming south southwest around 6 mph in the morning.
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 northeast 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 9 mph, with gusts as high as 15 mph.
Thursday
Sunny, with a high near 85.
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 81.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles S Martinsville IL
 39.29°N 87.89°W (Elev. 600 ft)
Last Update:
3:40 am CDT Aug 18, 2025
Forecast Valid:
3am CDT Aug 18, 2025-6pm CDT Aug 24, 2025
 
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