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

89°F

32°C

Humidity 59%
Wind Speed S 9 mph
Barometer 30.05 in (1016.7 mb)
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index97°F (36°C)
Last update 17 Aug 1:53 pm CDT
Extended Forecast for

2 Miles NW Lerna IL

Heat Advisory August 17, 01:59pm until August 17, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory August 17, 01:59pm until August 17, 08:00pm

    NOW until 8:00pm Sun

    Heat Advisory

  • This Afternoon

    High: 90 °F

    Slight Chance
    T-storms

  • Tonight

    Tonight: A slight chance of showers and thunderstorms between 8pm and 10pm. Mostly cloudy, with a low around 72. Light and variable wind. Chance of precipitation is 20%.

    Low: 72 °F

    Slight Chance
    T-storms then
    Mostly Cloudy

  • Monday

    Monday: A slight chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 90. Heat index values as high as 101. South southeast wind 3 to 6 mph. Chance of precipitation is 20%.

    High: 90 °F

    Slight Chance
    Showers then
    Slight Chance
    T-storms

  • Monday Night

    Monday Night: Mostly clear, with a low around 72. Light south southeast wind.

    Low: 72 °F

    Mostly Clear

  • Tuesday

    Tuesday: A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 88. Light and variable wind becoming west southwest around 6 mph in the morning.

    High: 88 °F

    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A chance of showers before 10pm, then a chance of showers and thunderstorms between 10pm and 1am. Partly cloudy, with a low around 70. Calm wind becoming north around 5 mph after midnight. Chance of precipitation is 30%.

    Low: 70 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: Mostly sunny, with a high near 85. North northeast wind 6 to 8 mph.

    High: 85 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 65.

    Low: 65 °F

    Partly Cloudy

Detailed Forecast

This Afternoon
A 20 percent chance of showers and thunderstorms before 4pm. Partly sunny, with a high near 90. South wind around 6 mph.
Tonight
A slight chance of showers and thunderstorms between 8pm and 10pm. Mostly cloudy, with a low around 72. Light and variable wind. Chance of precipitation is 20%.
Monday
A slight chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 90. Heat index values as high as 101. South southeast wind 3 to 6 mph. Chance of precipitation is 20%.
Monday Night
Mostly clear, with a low around 72. Light south southeast wind.
Tuesday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 88. Light and variable wind becoming west southwest around 6 mph in the morning.
Tuesday Night
A chance of showers before 10pm, then a chance of showers and thunderstorms between 10pm and 1am. Partly cloudy, with a low around 70. 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 8 mph.
Wednesday Night
Partly cloudy, with a low around 65.
Thursday
Mostly sunny, with a high near 83.
Thursday Night
Mostly clear, with a low around 63.
Friday
Sunny, with a high near 85.
Friday Night
Mostly clear, with a low around 65.
Saturday
Sunny, with a high near 86.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles NW Lerna IL
 39.44°N 88.31°W (Elev. 709 ft)
Last Update:
1:55 pm CDT Aug 17, 2025
Forecast Valid:
1pm CDT Aug 17, 2025-6pm CDT Aug 23, 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