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

70°F

21°C

Humidity 84%
Wind Speed SW 7 mph
Barometer 29.65 in (1003.6 mb)
Dewpoint 65°F (18°C)
Visibility 10.00 mi
Last update 1 Aug 12:53 pm CDT
Extended Forecast for

Lerna IL

  • This Afternoon

    This Afternoon: A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 75. Southwest wind around 6 mph.

    High: 75 °F

    Chance
    T-storms

  • Tonight

    Tonight: Showers and thunderstorms before 1am, then showers likely. Low around 65. Calm wind becoming north 5 to 9 mph after midnight. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 65 °F

    Showers

  • Sunday

    Sunday: A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 77. North wind around 14 mph, with gusts as high as 24 mph. Chance of precipitation is 50%.

    High: 77 °F

    Chance
    Showers

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 63. North wind 8 to 13 mph, with gusts as high as 22 mph.

    Low: 63 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 79. North northeast wind around 8 mph, with gusts as high as 15 mph.

    High: 79 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 63. North northeast wind 3 to 6 mph.

    Low: 63 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 81. North northeast wind 3 to 5 mph.

    High: 81 °F

    Sunny

  • Tuesday Night

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

    Low: 64 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 83.

    High: 83 °F

    Sunny

Detailed Forecast

This Afternoon
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 75. Southwest wind around 6 mph.
Tonight
Showers and thunderstorms before 1am, then showers likely. Low around 65. Calm wind becoming north 5 to 9 mph after midnight. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday
A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 77. North wind around 14 mph, with gusts as high as 24 mph. Chance of precipitation is 50%.
Sunday Night
Partly cloudy, with a low around 63. North wind 8 to 13 mph, with gusts as high as 22 mph.
Monday
Mostly sunny, with a high near 79. North northeast wind around 8 mph, with gusts as high as 15 mph.
Monday Night
Mostly clear, with a low around 63. North northeast wind 3 to 6 mph.
Tuesday
Sunny, with a high near 81. North northeast wind 3 to 5 mph.
Tuesday Night
Mostly clear, with a low around 64.
Wednesday
Sunny, with a high near 83.
Wednesday Night
A 30 percent chance of showers after 1am. Partly cloudy, with a low around 66.
Thursday
A chance of showers. Mostly sunny, with a high near 83.
Thursday Night
A chance of showers. Partly cloudy, with a low around 68.
Friday
A chance of showers. Mostly sunny, with a high near 85.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Lerna IL
 39.42°N 88.25°W (Elev. 712 ft)
Last Update:
11:46 am CDT Aug 1, 2026
Forecast Valid:
1pm CDT Aug 1, 2026-6pm CDT Aug 7, 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