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.

Fog/Mist

69°F

21°C

Humidity 96%
Wind Speed N 14 mph
Barometer 29.68 in (1004.5 mb)
Dewpoint 68°F (20°C)
Visibility 6.00 mi
Last update 2 Aug 12:53 am CDT
Extended Forecast for

Lerna IL

  • Overnight

    Overnight: Showers likely, mainly before 2am. Mostly cloudy, with a low around 65. North wind 11 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 65 °F

    Showers
    Likely

  • Sunday

    Sunday: A slight chance of showers before 9am, then a slight chance of showers and thunderstorms after 5pm. Partly sunny, with a high near 77. North wind 14 to 16 mph, with gusts as high as 26 mph. Chance of precipitation is 20%.

    High: 77 °F

    Slight Chance
    Showers then
    Slight Chance
    T-storms

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 63. North wind 6 to 11 mph, with gusts as high as 20 mph.

    Low: 63 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 79. North northeast wind 6 to 8 mph.

    High: 79 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 62. Northeast wind 3 to 6 mph.

    Low: 62 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 81. Northeast wind around 5 mph becoming calm in the morning.

    High: 81 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 64. Calm wind.

    Low: 64 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 83.

    High: 83 °F

    Sunny

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 65.

    Low: 65 °F

    Partly Cloudy
    then Chance
    T-storms

Detailed Forecast

Overnight
Showers likely, mainly before 2am. Mostly cloudy, with a low around 65. North wind 11 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Sunday
A slight chance of showers before 9am, then a slight chance of showers and thunderstorms after 5pm. Partly sunny, with a high near 77. North wind 14 to 16 mph, with gusts as high as 26 mph. Chance of precipitation is 20%.
Sunday Night
Mostly clear, with a low around 63. North wind 6 to 11 mph, with gusts as high as 20 mph.
Monday
Mostly sunny, with a high near 79. North northeast wind 6 to 8 mph.
Monday Night
Mostly clear, with a low around 62. Northeast wind 3 to 6 mph.
Tuesday
Sunny, with a high near 81. Northeast wind around 5 mph becoming calm in the morning.
Tuesday Night
Mostly clear, with a low around 64. Calm wind.
Wednesday
Sunny, with a high near 83.
Wednesday Night
A 30 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 65.
Thursday
A 40 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 82.
Thursday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 67.
Friday
Mostly sunny, with a high near 84.
Friday Night
Partly cloudy, with a low around 69.
Saturday
Mostly sunny, with a high near 87.
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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:
11:47 pm CDT Aug 1, 2026
Forecast Valid:
1am CDT Aug 2, 2026-6pm CDT Aug 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