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

57°F

14°C

Humidity 27%
Wind Speed SW 5 mph
Barometer 30.05 in (1017.7 mb)
Dewpoint 23°F (-5°C)
Visibility 10.00 mi
Last update 28 Feb 12:53 pm CST
Extended Forecast for

Lerna IL

  • This Afternoon

    This Afternoon: A 20 percent chance of rain after 3pm. Partly sunny, with a high near 56. East wind 6 to 8 mph.

    High: 56 °F

    Slight Chance
    Rain

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming mostly clear, with a low around 27. North wind 7 to 15 mph, with gusts as high as 23 mph.

    Low: 27 °F

    Decreasing
    Clouds

  • Sunday

    Sunday: Partly sunny, with a high near 41. Northeast wind 10 to 15 mph, with gusts as high as 23 mph.

    High: 41 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: A 50 percent chance of snow. Mostly cloudy, with a low around 29. East northeast wind around 10 mph, with gusts as high as 18 mph.

    Low: 29 °F

    Chance Snow

  • Monday

    Monday: A chance of snow before 9am, then a chance of rain between 9am and noon. Cloudy, with a high near 41. East southeast wind 9 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.

    High: 41 °F

    Chance
    Rain/Snow
    then Cloudy

  • Monday Night

    Monday Night: Rain, mainly after midnight. Low around 37. Southeast wind 8 to 10 mph, with gusts as high as 17 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 37 °F

    Chance Rain
    then Rain

  • Tuesday

    Tuesday: Rain. High near 58. South southwest wind 9 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    High: 58 °F

    Rain

  • Tuesday Night

    Tuesday Night: Rain and possibly a thunderstorm. Low around 49. Chance of precipitation is 90%.

    Low: 49 °F

    Rain

  • Wednesday

    Wednesday: Rain, with thunderstorms also possible after noon. High near 62. Chance of precipitation is 80%.

    High: 62 °F

    Rain

Detailed Forecast

This Afternoon
A 20 percent chance of rain after 3pm. Partly sunny, with a high near 56. East wind 6 to 8 mph.
Tonight
Mostly cloudy, then gradually becoming mostly clear, with a low around 27. North wind 7 to 15 mph, with gusts as high as 23 mph.
Sunday
Partly sunny, with a high near 41. Northeast wind 10 to 15 mph, with gusts as high as 23 mph.
Sunday Night
A 50 percent chance of snow. Mostly cloudy, with a low around 29. East northeast wind around 10 mph, with gusts as high as 18 mph.
Monday
A chance of snow before 9am, then a chance of rain between 9am and noon. Cloudy, with a high near 41. East southeast wind 9 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.
Monday Night
Rain, mainly after midnight. Low around 37. Southeast wind 8 to 10 mph, with gusts as high as 17 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Tuesday
Rain. High near 58. South southwest wind 9 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Tuesday Night
Rain and possibly a thunderstorm. Low around 49. Chance of precipitation is 90%.
Wednesday
Rain, with thunderstorms also possible after noon. High near 62. Chance of precipitation is 80%.
Wednesday Night
Rain likely and possibly a thunderstorm. Mostly cloudy, with a low around 50. Chance of precipitation is 70%.
Thursday
Rain likely. Mostly cloudy, with a high near 65.
Thursday Night
Rain likely and possibly a thunderstorm. Mostly cloudy, with a low around 54.
Friday
Rain likely. Mostly cloudy, with a high near 67.
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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:
12:26 pm CST Feb 28, 2026
Forecast Valid:
1pm CST Feb 28, 2026-6pm CST Mar 6, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation