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.

Fog/Mist

37°F

3°C

Humidity 96%
Wind Speed SE 7 mph
Barometer 30.15 in (1021.6 mb)
Dewpoint 36°F (2°C)
Visibility 5.00 mi
Wind Chill32°F (0°C)
Last update 3 Mar 12:53 am CST
Extended Forecast for

Lerna IL

  • Overnight

    Overnight: Rain likely, mainly after 5am. Patchy fog after 3am. Otherwise, cloudy, with a low around 35. East southeast wind around 6 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 35 °F

    Rain Likely
    and Patchy
    Fog

  • Tuesday

    Tuesday: Rain before noon, then a chance of rain and thunderstorms between noon and 4pm, then rain and possibly a thunderstorm after 4pm. High near 49. East wind around 5 mph becoming south in the afternoon. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

    High: 49 °F

    Rain

  • Tuesday Night

    Tuesday Night: Rain and possibly a thunderstorm. Patchy fog. Low around 44. East northeast wind 5 to 7 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.

    Low: 44 °F

    Rain and
    Patchy Fog

  • Wednesday

    Wednesday: Rain and possibly a thunderstorm. Patchy fog before 7am. High near 58. Southeast wind 5 to 7 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    High: 58 °F

    Rain and
    Patchy Fog

  • Wednesday Night

    Wednesday Night: Rain and possibly a thunderstorm. Low around 53. South wind 5 to 9 mph, with gusts as high as 16 mph. Chance of precipitation is 80%. New rainfall amounts between three quarters and one inch possible.

    Low: 53 °F

    Rain

  • Thursday

    Thursday: Rain, mainly before noon. High near 64. South southwest wind 7 to 14 mph, with gusts as high as 21 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 64 °F

    Rain then
    Chance Rain

  • Thursday Night

    Thursday Night: A 40 percent chance of rain. Mostly cloudy, with a low around 51. Southwest wind 6 to 9 mph becoming south southeast after midnight. Winds could gust as high as 15 mph.

    Low: 51 °F

    Chance Rain

  • Friday

    Friday: A chance of rain and thunderstorms. Mostly cloudy, with a high near 73. Breezy. Chance of precipitation is 50%.

    High: 73 °F

    Chance
    T-storms then
    Chance Rain
    and Breezy

  • Friday Night

    Friday Night: A chance of rain, then rain likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 58. Chance of precipitation is 60%.

    Low: 58 °F

    Chance Rain
    then Rain
    Likely

Detailed Forecast

Overnight
Rain likely, mainly after 5am. Patchy fog after 3am. Otherwise, cloudy, with a low around 35. East southeast wind around 6 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Tuesday
Rain before noon, then a chance of rain and thunderstorms between noon and 4pm, then rain and possibly a thunderstorm after 4pm. High near 49. East wind around 5 mph becoming south in the afternoon. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Tuesday Night
Rain and possibly a thunderstorm. Patchy fog. Low around 44. East northeast wind 5 to 7 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.
Wednesday
Rain and possibly a thunderstorm. Patchy fog before 7am. High near 58. Southeast wind 5 to 7 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday Night
Rain and possibly a thunderstorm. Low around 53. South wind 5 to 9 mph, with gusts as high as 16 mph. Chance of precipitation is 80%. New rainfall amounts between three quarters and one inch possible.
Thursday
Rain, mainly before noon. High near 64. South southwest wind 7 to 14 mph, with gusts as high as 21 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Thursday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 51. Southwest wind 6 to 9 mph becoming south southeast after midnight. Winds could gust as high as 15 mph.
Friday
A chance of rain and thunderstorms. Mostly cloudy, with a high near 73. Breezy. Chance of precipitation is 50%.
Friday Night
A chance of rain, then rain likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 58. Chance of precipitation is 60%.
Saturday
Rain likely, mainly before noon. Mostly cloudy, with a high near 66. Chance of precipitation is 70%.
Saturday Night
Mostly cloudy, with a low around 42.
Sunday
Mostly sunny, with a high near 62.
Sunday Night
Mostly clear, with a low around 47.
Monday
Sunny, 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:
12:31 am CST Mar 3, 2026
Forecast Valid:
1am CST Mar 3, 2026-6pm CDT Mar 9, 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