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Hazardous Weather Conditions

Current conditions at

Mattoon / Charleston, Coles County Memorial Airport (KMTO)

Lat: 39.48°NLon: 88.28°WElev: 722ft.

Overcast

68°F

20°C

Humidity 84%
Wind Speed E 10 mph
Barometer 30.08 in (1018.1 mb)
Dewpoint 63°F (17°C)
Visibility 9.00 mi
Last update 15 Oct 1:53 am CDT
Extended Forecast for

Lerna IL

  • Overnight

    Overnight: Mostly cloudy, with a low around 63. East northeast wind around 7 mph.

    Low: 63 °F

    Mostly Cloudy

  • Thursday

    Thursday: A slight chance of showers before 10am, then a chance of showers and thunderstorms between 10am and 1pm, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 78. East wind 6 to 10 mph becoming south in the afternoon. Winds could gust as high as 18 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 78 °F

    Showers
    Likely

  • Thursday Night

    Thursday Night: Showers likely and possibly a thunderstorm before midnight, then a chance of showers. Increasing clouds, with a low around 49. Southwest wind 13 to 18 mph becoming west northwest after midnight. Winds could gust as high as 28 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 49 °F

    Showers
    Likely

  • Friday

    Friday: Cloudy, then gradually becoming mostly sunny, with a high near 56. Northwest wind around 18 mph, with gusts as high as 31 mph.

    High: 56 °F

    Decreasing
    Clouds

  • Friday Night

    Friday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 38. North wind 13 to 17 mph, with gusts as high as 24 mph.

    Low: 38 °F

    Decreasing
    Clouds

  • Saturday

    Saturday: Sunny, with a high near 59. North wind 5 to 9 mph becoming light north northeast in the afternoon. Winds could gust as high as 15 mph.

    High: 59 °F

    Sunny

  • Saturday Night

    Saturday Night: Areas of frost after 3am. Otherwise, clear, with a low around 34. Light and variable wind.

    Low: 34 °F

    Clear then
    Areas Frost

  • Sunday

    Sunday: Widespread frost, mainly before 7am. Otherwise, sunny, with a high near 66.

    High: 66 °F

    Frost then
    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 39.

    Low: 39 °F

    Clear

Detailed Forecast

Overnight
Mostly cloudy, with a low around 63. East northeast wind around 7 mph.
Thursday
A slight chance of showers before 10am, then a chance of showers and thunderstorms between 10am and 1pm, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 78. East wind 6 to 10 mph becoming south in the afternoon. Winds could gust as high as 18 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday Night
Showers likely and possibly a thunderstorm before midnight, then a chance of showers. Increasing clouds, with a low around 49. Southwest wind 13 to 18 mph becoming west northwest after midnight. Winds could gust as high as 28 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday
Cloudy, then gradually becoming mostly sunny, with a high near 56. Northwest wind around 18 mph, with gusts as high as 31 mph.
Friday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 38. North wind 13 to 17 mph, with gusts as high as 24 mph.
Saturday
Sunny, with a high near 59. North wind 5 to 9 mph becoming light north northeast in the afternoon. Winds could gust as high as 15 mph.
Saturday Night
Areas of frost after 3am. Otherwise, clear, with a low around 34. Light and variable wind.
Sunday
Widespread frost, mainly before 7am. Otherwise, sunny, with a high near 66.
Sunday Night
Clear, with a low around 39.
Monday
Mostly sunny, with a high near 71.
Monday Night
Partly cloudy, with a low around 43.
Tuesday
Mostly sunny, with a high near 73.
Tuesday Night
Mostly clear, with a low around 44.
Wednesday
Sunny, with a high near 75.
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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:
1:55 am CDT Oct 15, 2026
Forecast Valid:
2am CDT Oct 15, 2026-6pm CDT Oct 21, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation