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.

Fair

40°F

4°C

Humidity 86%
Wind Speed SE 7 mph
Barometer 29.90 in (1013.1 mb)
Dewpoint 36°F (2°C)
Visibility 10.00 mi
Wind Chill35°F (2°C)
Last update 26 Feb 8:53 pm CST
Extended Forecast for

Lerna IL

  • Tonight

    Tonight: Mostly clear, with a low around 34. Southwest wind 3 to 6 mph.

    Low: 34 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 63. Southwest wind 6 to 11 mph increasing to 13 to 18 mph in the afternoon. Winds could gust as high as 31 mph.

    High: 63 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 36. South southwest wind 7 to 13 mph becoming north after midnight. Winds could gust as high as 25 mph.

    Low: 36 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 55. East northeast wind 7 to 10 mph, with gusts as high as 17 mph.

    High: 55 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 25. North northeast wind 10 to 14 mph, with gusts as high as 23 mph.

    Low: 25 °F

    Partly Cloudy

  • Sunday

    Sunday: Increasing clouds, with a high near 39. Northeast wind 11 to 14 mph, with gusts as high as 22 mph.

    High: 39 °F

    Increasing
    Clouds

  • Sunday Night

    Sunday Night: Rain and snow likely. Cloudy, with a low around 24. East northeast wind around 11 mph, with gusts as high as 20 mph. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 24 °F

    Rain/Snow
    Likely

  • Monday

    Monday: Mostly cloudy, with a high near 36.

    High: 36 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: A 30 percent chance of rain after midnight. Mostly cloudy, with a low around 26.

    Low: 26 °F

    Mostly Cloudy
    then Chance
    Rain

Detailed Forecast

Tonight
Mostly clear, with a low around 34. Southwest wind 3 to 6 mph.
Friday
Sunny, with a high near 63. Southwest wind 6 to 11 mph increasing to 13 to 18 mph in the afternoon. Winds could gust as high as 31 mph.
Friday Night
Mostly clear, with a low around 36. South southwest wind 7 to 13 mph becoming north after midnight. Winds could gust as high as 25 mph.
Saturday
Mostly sunny, with a high near 55. East northeast wind 7 to 10 mph, with gusts as high as 17 mph.
Saturday Night
Partly cloudy, with a low around 25. North northeast wind 10 to 14 mph, with gusts as high as 23 mph.
Sunday
Increasing clouds, with a high near 39. Northeast wind 11 to 14 mph, with gusts as high as 22 mph.
Sunday Night
Rain and snow likely. Cloudy, with a low around 24. East northeast wind around 11 mph, with gusts as high as 20 mph. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.
Monday
Mostly cloudy, with a high near 36.
Monday Night
A 30 percent chance of rain after midnight. Mostly cloudy, with a low around 26.
Tuesday
A 50 percent chance of rain. Cloudy, with a high near 42.
Tuesday Night
Rain likely. Mostly cloudy, with a low around 34.
Wednesday
A chance of rain. Cloudy, with a high near 52.
Wednesday Night
Rain likely. Cloudy, with a low around 44.
Thursday
Rain likely. Cloudy, with a high near 61.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Lerna IL
 39.42°N 88.28°W (Elev. 741 ft)
Last Update:
9:36 pm CST Feb 26, 2026
Forecast Valid:
9pm CST Feb 26, 2026-6pm CST Mar 5, 2026
 
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