National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Mattoon / Charleston, Coles County Memorial Airport (KMTO)

Lat: 39.48°NLon: 88.28°WElev: 722ft.

Overcast

49°F

9°C

Humidity 74%
Wind Speed NE 5 mph
Barometer 30.04 in (1017.4 mb)
Dewpoint 41°F (5°C)
Visibility 10.00 mi
Wind Chill47°F (8°C)
Last update 1 May 8:53 pm CDT
Extended Forecast for

Lerna IL

  • Tonight

    Tonight: A 20 percent chance of showers. Mostly cloudy, with a low around 41. Light and variable wind becoming east around 5 mph after midnight.

    Low: 41 °F

    Slight Chance
    Showers

  • Saturday

    Saturday: A 20 percent chance of showers before 8am. Partly sunny, with a high near 54. East northeast wind 6 to 9 mph becoming north northwest in the afternoon. Winds could gust as high as 15 mph.

    High: 54 °F

    Slight Chance
    Showers then
    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 37. North northwest wind around 6 mph becoming calm.

    Low: 37 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 66. South southwest wind 8 to 16 mph, with gusts as high as 28 mph.

    High: 66 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 51. South southwest wind 9 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 40%.

    Low: 51 °F

    Chance
    T-storms

  • Monday

    Monday: A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 74. Southwest wind 9 to 17 mph, with gusts as high as 30 mph.

    High: 74 °F

    Mostly Sunny
    then Chance
    T-storms

  • Monday Night

    Monday Night: A chance of showers and thunderstorms, then showers likely after 1am. Mostly cloudy, with a low around 55. South southwest wind 11 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 55 °F

    Chance
    T-storms then
    Showers
    Likely

  • Tuesday

    Tuesday: Showers likely, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 64. Chance of precipitation is 70%.

    High: 64 °F

    Showers
    Likely

  • Tuesday Night

    Tuesday Night: Showers likely, mainly before 1am. Mostly cloudy, with a low around 44. Chance of precipitation is 70%.

    Low: 44 °F

    Showers
    Likely

Detailed Forecast

Tonight
A 20 percent chance of showers. Mostly cloudy, with a low around 41. Light and variable wind becoming east around 5 mph after midnight.
Saturday
A 20 percent chance of showers before 8am. Partly sunny, with a high near 54. East northeast wind 6 to 9 mph becoming north northwest in the afternoon. Winds could gust as high as 15 mph.
Saturday Night
Mostly clear, with a low around 37. North northwest wind around 6 mph becoming calm.
Sunday
Mostly sunny, with a high near 66. South southwest wind 8 to 16 mph, with gusts as high as 28 mph.
Sunday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 51. South southwest wind 9 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 40%.
Monday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 74. Southwest wind 9 to 17 mph, with gusts as high as 30 mph.
Monday Night
A chance of showers and thunderstorms, then showers likely after 1am. Mostly cloudy, with a low around 55. South southwest wind 11 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tuesday
Showers likely, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 64. Chance of precipitation is 70%.
Tuesday Night
Showers likely, mainly before 1am. Mostly cloudy, with a low around 44. Chance of precipitation is 70%.
Wednesday
A 30 percent chance of showers. Partly sunny, with a high near 60.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 42.
Thursday
Mostly sunny, with a high near 59.
Thursday Night
Mostly clear, with a low around 42.
Friday
Mostly sunny, with a high near 65.
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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 CDT May 1, 2026
Forecast Valid:
9pm CDT May 1, 2026-6pm CDT May 8, 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