National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Mattoon / Charleston, Coles County Memorial Airport (KMTO)

Lat: 39.48°NLon: 88.28°WElev: 722ft.

A Few Clouds

78°F

26°C

Humidity 52%
Wind Speed N 8 mph
Barometer 30.07 in (1017.9 mb)
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 3 Aug 4:53 pm CDT
Extended Forecast for

Lerna IL

  • Tonight

    Tonight: Increasing clouds, with a low around 62. Northeast wind around 6 mph.

    Low: 62 °F

    Increasing
    Clouds

  • Monday

    Monday: A 30 percent chance of showers and thunderstorms, mainly after 1pm. Mostly cloudy, with a high near 80. East wind 5 to 8 mph.

    High: 80 °F

    Mostly Cloudy
    then Chance
    T-storms

  • Monday Night

    Monday Night: A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 64. East southeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 20%.

    Low: 64 °F

    Slight Chance
    T-storms then
    Slight Chance
    Showers

  • Tuesday

    Tuesday: A 40 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 80. Calm wind becoming east southeast around 5 mph in the afternoon.

    High: 80 °F

    Mostly Sunny
    then Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 65. Calm wind.

    Low: 65 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 83. Calm wind.

    High: 83 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 65. Calm wind.

    Low: 65 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 85.

    High: 85 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 66.

    Low: 66 °F

    Mostly Clear

Detailed Forecast

Tonight
Increasing clouds, with a low around 62. Northeast wind around 6 mph.
Monday
A 30 percent chance of showers and thunderstorms, mainly after 1pm. Mostly cloudy, with a high near 80. East wind 5 to 8 mph.
Monday Night
A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 64. East southeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 20%.
Tuesday
A 40 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 80. Calm wind becoming east southeast around 5 mph in the afternoon.
Tuesday Night
Partly cloudy, with a low around 65. Calm wind.
Wednesday
Mostly sunny, with a high near 83. Calm wind.
Wednesday Night
Mostly clear, with a low around 65. Calm wind.
Thursday
Sunny, with a high near 85.
Thursday Night
Mostly clear, with a low around 66.
Friday
Sunny, with a high near 86.
Friday Night
Mostly clear, with a low around 68.
Saturday
Sunny, with a high near 88.
Saturday Night
Mostly clear, with a low around 70.
Sunday
Mostly sunny, with a high near 88.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Lerna IL
 39.42°N 88.28°W (Elev. 741 ft)
Last Update:
4:40 pm CDT Aug 3, 2025
Forecast Valid:
5pm CDT Aug 3, 2025-6pm CDT Aug 10, 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