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.

Partly Cloudy

42°F

6°C

Humidity 55%
Wind Speed NA
Barometer 30.31 in (1026.5 mb)
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Last update 29 Mar 3:53 am CDT
Extended Forecast for

Lerna IL

  • Today

    Today: Mostly sunny, with a high near 64. South southwest wind 9 to 16 mph, with gusts as high as 25 mph.

    High: 64 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 54. South wind 11 to 13 mph, with gusts as high as 25 mph.

    Low: 54 °F

    Mostly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 77. Breezy, with a south southwest wind 14 to 20 mph, with gusts as high as 32 mph.

    High: 77 °F

    Partly Sunny
    then Mostly
    Sunny and
    Breezy

  • Monday Night

    Monday Night: Partly cloudy, with a low around 63. Breezy, with a south southwest wind 18 to 20 mph, with gusts as high as 30 mph.

    Low: 63 °F

    Partly Cloudy
    and Breezy

  • Tuesday

    Tuesday: A chance of rain between 1pm and 4pm, then a chance of rain and thunderstorms after 4pm. Partly sunny, with a high near 79. Breezy, with a south southwest wind 18 to 25 mph, with gusts as high as 40 mph. Chance of precipitation is 40%.

    High: 79 °F

    Breezy.
    Partly Sunny
    then Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Rain likely and possibly a thunderstorm before 1am, then rain between 1am and 4am, then rain and possibly a thunderstorm after 4am. Low around 48. Southwest wind 15 to 17 mph becoming north after midnight. Winds could gust as high as 30 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 48 °F

    Rain

  • Wednesday

    Wednesday: Rain likely and possibly a thunderstorm before 7am, then rain likely between 7am and 1pm, then a chance of rain and thunderstorms after 1pm. Mostly cloudy, with a high near 56. North northeast wind around 16 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.

    High: 56 °F

    Rain Likely

  • Wednesday Night

    Wednesday Night: Rain likely, mainly after 1am. Cloudy, with a low around 45. Chance of precipitation is 60%.

    Low: 45 °F

    Rain Likely

  • Thursday

    Thursday: Rain likely and possibly a thunderstorm. Cloudy, with a high near 61. Chance of precipitation is 70%.

    High: 61 °F

    Rain Likely

Detailed Forecast

Today
Mostly sunny, with a high near 64. South southwest wind 9 to 16 mph, with gusts as high as 25 mph.
Tonight
Mostly cloudy, with a low around 54. South wind 11 to 13 mph, with gusts as high as 25 mph.
Monday
Partly sunny, with a high near 77. Breezy, with a south southwest wind 14 to 20 mph, with gusts as high as 32 mph.
Monday Night
Partly cloudy, with a low around 63. Breezy, with a south southwest wind 18 to 20 mph, with gusts as high as 30 mph.
Tuesday
A chance of rain between 1pm and 4pm, then a chance of rain and thunderstorms after 4pm. Partly sunny, with a high near 79. Breezy, with a south southwest wind 18 to 25 mph, with gusts as high as 40 mph. Chance of precipitation is 40%.
Tuesday Night
Rain likely and possibly a thunderstorm before 1am, then rain between 1am and 4am, then rain and possibly a thunderstorm after 4am. Low around 48. Southwest wind 15 to 17 mph becoming north after midnight. Winds could gust as high as 30 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday
Rain likely and possibly a thunderstorm before 7am, then rain likely between 7am and 1pm, then a chance of rain and thunderstorms after 1pm. Mostly cloudy, with a high near 56. North northeast wind around 16 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.
Wednesday Night
Rain likely, mainly after 1am. Cloudy, with a low around 45. Chance of precipitation is 60%.
Thursday
Rain likely and possibly a thunderstorm. Cloudy, with a high near 61. Chance of precipitation is 70%.
Thursday Night
Rain likely. Mostly cloudy, with a low around 45. Chance of precipitation is 70%.
Friday
A chance of rain. Mostly cloudy, with a high near 70.
Friday Night
A chance of rain. Mostly cloudy, with a low around 55.
Saturday
Rain likely. Mostly cloudy, with a high near 69. Breezy.
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ABOUT THIS FORECAST

 
Point Forecast:
Lerna IL
 39.42°N 88.28°W (Elev. 741 ft)
Last Update:
2:00 am CDT Mar 29, 2026
Forecast Valid:
4am CDT Mar 29, 2026-6pm CDT Apr 4, 2026
 
Forecast Discussion
 
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Additional Resources

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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