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

84°F

29°C

Humidity 72%
Wind Speed Calm
Barometer 30.04 in (1016.6 mb)
Dewpoint 74°F (23°C)
Visibility 10.00 mi
Heat Index91°F (33°C)
Last update 16 Aug 7:53 pm CDT
Extended Forecast for

6 Miles S Martinsville IL

Heat Advisory until August 17, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory until August 17, 08:00pm

    NOW until 8:00pm Sun

    Heat Advisory

  • Tonight

    Low: 75 °F

    Slight Chance
    T-storms

  • Sunday

    Sunday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 91. Light and variable wind.

    High: 91 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 73. Calm wind.

    Low: 73 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 92. Heat index values as high as 101. Calm wind becoming south around 5 mph in the afternoon.

    High: 92 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 74. Light south southeast wind.

    Low: 74 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 94. West wind 3 to 6 mph.

    High: 94 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 71. West northwest wind around 6 mph becoming north after midnight.

    Low: 71 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: Mostly sunny, with a high near 84.

    High: 84 °F

    Mostly Sunny

Detailed Forecast

Tonight
A slight chance of showers and thunderstorms before 9pm, then a slight chance of showers and thunderstorms after 2am. Partly cloudy, with a low around 75. Light south wind. Chance of precipitation is 20%.
Sunday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 91. Light and variable wind.
Sunday Night
Partly cloudy, with a low around 73. Calm wind.
Monday
Sunny, with a high near 92. Heat index values as high as 101. Calm wind becoming south around 5 mph in the afternoon.
Monday Night
Mostly clear, with a low around 74. Light south southeast wind.
Tuesday
Sunny, with a high near 94. West wind 3 to 6 mph.
Tuesday Night
A 30 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 71. West northwest wind around 6 mph becoming north after midnight.
Wednesday
Mostly sunny, with a high near 84.
Wednesday Night
Partly cloudy, with a low around 66.
Thursday
Mostly sunny, with a high near 82.
Thursday Night
Mostly clear, with a low around 64.
Friday
Sunny, with a high near 85.
Friday Night
Mostly clear, with a low around 66.
Saturday
Sunny, with a high near 87.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
6 Miles S Martinsville IL
 39.25°N 87.86°W (Elev. 587 ft)
Last Update:
7:25 pm CDT Aug 16, 2025
Forecast Valid:
7pm CDT Aug 16, 2025-6pm CDT Aug 23, 2025
 
Forecast Discussion
 
Get as KML Get as XML

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