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

28°F

-2°C

Humidity 35%
Wind Speed SE 17 G 24 mph
Barometer 30.34 in (1028.5 mb)
Dewpoint 4°F (-16°C)
Visibility 10.00 mi
Wind Chill16°F (-9°C)
Last update 20 Jan 1:53 pm CST
Extended Forecast for

Lerna IL

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 30. South wind 10 to 14 mph, with gusts as high as 21 mph.

    High: 30 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 23. South wind 10 to 16 mph, with gusts as high as 26 mph.

    Low: 23 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A 20 percent chance of snow before 7am. Cloudy through mid morning, then gradual clearing, with a high near 41. West wind 11 to 16 mph, with gusts as high as 26 mph.

    High: 41 °F

    Slight Chance
    Snow then
    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 21. West southwest wind 9 to 14 mph, with gusts as high as 23 mph.

    Low: 21 °F

    Partly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 31. Northwest wind 5 to 9 mph, with gusts as high as 15 mph.

    High: 31 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 5. Light north northwest wind becoming north 10 to 15 mph in the evening. Winds could gust as high as 22 mph.

    Low: 5 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly cloudy and cold, with a high near 10. North wind 13 to 15 mph, with gusts as high as 23 mph.

    High: 10 °F

    Cold

  • Friday Night

    Friday Night: Mostly cloudy, with a low around -1.

    Low: -1 °F

    Mostly Cloudy

  • Saturday

    Saturday: A 30 percent chance of snow after noon. Cloudy, with a high near 12.

    High: 12 °F

    Cloudy then
    Chance Snow

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 30. South wind 10 to 14 mph, with gusts as high as 21 mph.
Tonight
Mostly cloudy, with a low around 23. South wind 10 to 16 mph, with gusts as high as 26 mph.
Wednesday
A 20 percent chance of snow before 7am. Cloudy through mid morning, then gradual clearing, with a high near 41. West wind 11 to 16 mph, with gusts as high as 26 mph.
Wednesday Night
Partly cloudy, with a low around 21. West southwest wind 9 to 14 mph, with gusts as high as 23 mph.
Thursday
Partly sunny, with a high near 31. Northwest wind 5 to 9 mph, with gusts as high as 15 mph.
Thursday Night
Mostly cloudy, with a low around 5. Light north northwest wind becoming north 10 to 15 mph in the evening. Winds could gust as high as 22 mph.
Friday
Mostly cloudy and cold, with a high near 10. North wind 13 to 15 mph, with gusts as high as 23 mph.
Friday Night
Mostly cloudy, with a low around -1.
Saturday
A 30 percent chance of snow after noon. Cloudy, with a high near 12.
Saturday Night
A 30 percent chance of snow before midnight. Mostly cloudy, with a low around 7.
Sunday
Partly sunny, with a high near 18.
Sunday Night
Partly cloudy, with a low around 3.
Monday
Mostly sunny, with a high near 19.
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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:
2:37 pm CST Jan 20, 2026
Forecast Valid:
2pm CST Jan 20, 2026-6pm CST Jan 26, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation