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

42°F

6°C

Humidity 82%
Wind Speed Calm
Barometer 30.05 in (1017.9 mb)
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Last update 19 Mar 1:53 am CDT
Extended Forecast for

Lerna IL

  • Overnight

    Overnight: Mostly cloudy, with a low around 38. Light south southeast wind.

    Low: 38 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly cloudy through mid morning, then gradual clearing, with a high near 69. South southeast wind 5 to 7 mph.

    High: 69 °F

    Becoming
    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 49. South wind 6 to 9 mph, with gusts as high as 17 mph.

    Low: 49 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 75. South southwest wind 9 to 14 mph becoming west in the afternoon. Winds could gust as high as 23 mph.

    High: 75 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 46. West northwest wind around 7 mph becoming north northeast after midnight.

    Low: 46 °F

    Mostly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 74. Northeast wind around 6 mph becoming south southwest in the morning.

    High: 74 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 55. South southwest wind 6 to 10 mph, with gusts as high as 20 mph.

    Low: 55 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 79. Breezy.

    High: 79 °F

    Sunny then
    Partly Sunny
    and Breezy

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 36.

    Low: 36 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 38. Light south southeast wind.
Thursday
Mostly cloudy through mid morning, then gradual clearing, with a high near 69. South southeast wind 5 to 7 mph.
Thursday Night
Partly cloudy, with a low around 49. South wind 6 to 9 mph, with gusts as high as 17 mph.
Friday
Mostly sunny, with a high near 75. South southwest wind 9 to 14 mph becoming west in the afternoon. Winds could gust as high as 23 mph.
Friday Night
Mostly cloudy, with a low around 46. West northwest wind around 7 mph becoming north northeast after midnight.
Saturday
Sunny, with a high near 74. Northeast wind around 6 mph becoming south southwest in the morning.
Saturday Night
Mostly clear, with a low around 55. South southwest wind 6 to 10 mph, with gusts as high as 20 mph.
Sunday
Mostly sunny, with a high near 79. Breezy.
Sunday Night
Partly cloudy, with a low around 36.
Monday
Sunny, with a high near 49.
Monday Night
Partly cloudy, with a low around 32.
Tuesday
Mostly cloudy, with a high near 54.
Tuesday Night
Mostly cloudy, with a low around 37.
Wednesday
Mostly sunny, with a high near 63.
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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:
1:56 am CDT Mar 19, 2026
Forecast Valid:
1am CDT Mar 19, 2026-6pm CDT Mar 25, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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