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

88°F

31°C

Humidity 68%
Wind Speed S 7 mph
Barometer 30.13 in (1019.3 mb)
Dewpoint 76°F (24°C)
Visibility 10.00 mi
Heat Index99°F (37°C)
Last update 2 Jul 10:53 am CDT
Extended Forecast for

Martinsville IL

Extreme Heat Warning July 2, 11:51am until July 3, 07:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning July 2, 11:51am until July 3, 07:00pm

    NOW until 7:00pm Fri

    Extreme Heat Warning

  • Today

    High: 93 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 74. South wind around 6 mph becoming calm in the evening.

    Low: 74 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 93. Heat index values as high as 105. Calm wind becoming southwest 5 to 9 mph in the morning. Winds could gust as high as 15 mph.

    High: 93 °F

    Sunny

  • Friday Night

    Friday Night: A 40 percent chance of showers and thunderstorms, mainly between 3am and 5am. Partly cloudy, with a low around 73. South southwest wind around 6 mph becoming light and variable after midnight.

    Low: 73 °F

    Chance
    T-storms

  • Independence Day

    Independence Day: Showers likely and possibly a thunderstorm after 1pm. Mostly sunny, with a high near 91. South southwest wind 3 to 7 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 91 °F

    Mostly Sunny
    then Showers
    Likely

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 72. South southwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 50%.

    Low: 72 °F

    Chance
    T-storms

  • Sunday

    Sunday: A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 89. West southwest wind 3 to 7 mph.

    High: 89 °F

    Chance
    T-storms

  • Sunday Night

    Sunday Night: A 30 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 69.

    Low: 69 °F

    Chance
    T-storms

Detailed Forecast

Today
Sunny, with a high near 93. Heat index values as high as 107. South southwest wind around 7 mph.
Tonight
Mostly clear, with a low around 74. South wind around 6 mph becoming calm in the evening.
Friday
Sunny, with a high near 93. Heat index values as high as 105. Calm wind becoming southwest 5 to 9 mph in the morning. Winds could gust as high as 15 mph.
Friday Night
A 40 percent chance of showers and thunderstorms, mainly between 3am and 5am. Partly cloudy, with a low around 73. South southwest wind around 6 mph becoming light and variable after midnight.
Independence Day
Showers likely and possibly a thunderstorm after 1pm. Mostly sunny, with a high near 91. South southwest wind 3 to 7 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 72. South southwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 50%.
Sunday
A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 89. West southwest wind 3 to 7 mph.
Sunday Night
A 30 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 69.
Monday
Mostly sunny, with a high near 86.
Monday Night
Partly cloudy, with a low around 68.
Tuesday
Mostly sunny, with a high near 86.
Tuesday Night
Partly cloudy, with a low around 69.
Wednesday
A chance of showers and thunderstorms. Mostly 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:
Martinsville IL
 39.34°N 87.88°W (Elev. 600 ft)
Last Update:
11:36 am CDT Jul 2, 2026
Forecast Valid:
11am CDT Jul 2, 2026-6pm CDT Jul 8, 2026
 
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