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

81°F

27°C

Humidity 77%
Wind Speed SE 7 mph
Barometer 30.10 in (1018.8 mb)
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index86°F (30°C)
Last update 7 Aug 4:53 pm CDT
Extended Forecast for

Lerna IL

  • This Afternoon

    This Afternoon: A 20 percent chance of showers and thunderstorms. Partly sunny, with a steady temperature around 78. South wind around 5 mph.

    High: 78 °F

    Slight Chance
    T-storms

  • Tonight

    Tonight: A 40 percent chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 69. South southeast wind 3 to 5 mph.

    Low: 69 °F

    Chance
    T-storms then
    Mostly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 88. South wind 5 to 9 mph.

    High: 88 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 70. South southeast wind around 6 mph.

    Low: 70 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 89. South wind 6 to 10 mph, with gusts as high as 16 mph.

    High: 89 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 70. South wind around 6 mph.

    Low: 70 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 89. South southwest wind around 7 mph.

    High: 89 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 71.

    Low: 71 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 87.

    High: 87 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
A 20 percent chance of showers and thunderstorms. Partly sunny, with a steady temperature around 78. South wind around 5 mph.
Tonight
A 40 percent chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 69. South southeast wind 3 to 5 mph.
Friday
Mostly sunny, with a high near 88. South wind 5 to 9 mph.
Friday Night
Mostly clear, with a low around 70. South southeast wind around 6 mph.
Saturday
Sunny, with a high near 89. South wind 6 to 10 mph, with gusts as high as 16 mph.
Saturday Night
Mostly clear, with a low around 70. South wind around 6 mph.
Sunday
Sunny, with a high near 89. South southwest wind around 7 mph.
Sunday Night
Mostly clear, with a low around 71.
Monday
Mostly sunny, with a high near 87.
Monday Night
A 30 percent chance of showers after 1am. Partly cloudy, with a low around 70.
Tuesday
A chance of showers and thunderstorms. 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 85.
Wednesday Night
Partly cloudy, with a low around 68.
Thursday
Mostly sunny, with a high near 86.
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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 7, 2025
Forecast Valid:
5pm CDT Aug 7, 2025-6pm CDT Aug 14, 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