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.

Overcast

40°F

4°C

Humidity 86%
Wind Speed NW 9 mph
Barometer 30.02 in (1016.7 mb)
Dewpoint 36°F (2°C)
Visibility 10.00 mi
Wind Chill34°F (1°C)
Last update 8 Mar 1:53 am CDT
Extended Forecast for

Lerna IL

  • Overnight

    Overnight: Mostly cloudy, with a low around 37. West northwest wind around 6 mph.

    Low: 37 °F

    Mostly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 60. Southwest wind 6 to 13 mph, with gusts as high as 22 mph.

    High: 60 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 42. South southwest wind 9 to 11 mph, with gusts as high as 21 mph.

    Low: 42 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 70. South southwest wind 10 to 18 mph, with gusts as high as 32 mph.

    High: 70 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 58. South southwest wind 11 to 15 mph, with gusts as high as 25 mph.

    Low: 58 °F

    Mostly Clear

  • Tuesday

    Tuesday: A 50 percent chance of showers and thunderstorms after noon. Mostly cloudy, with a high near 75. Breezy, with a south southwest wind 11 to 20 mph, with gusts as high as 31 mph.

    High: 75 °F

    Mostly Cloudy
    then Chance
    T-storms and
    Breezy

  • Tuesday Night

    Tuesday Night: Showers and possibly a thunderstorm. Low around 55. Breezy, with a south southwest wind 17 to 22 mph, with gusts as high as 34 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 55 °F

    Breezy.
    T-storms then
    Showers

  • Wednesday

    Wednesday: Showers. High near 65. Breezy. Chance of precipitation is 100%.

    High: 65 °F

    Breezy.
    Showers then
    Showers
    Likely

  • Wednesday Night

    Wednesday Night: A chance of rain and snow before midnight. Partly cloudy, with a low around 29. Blustery. Chance of precipitation is 30%.

    Low: 29 °F

    Chance
    Rain/Snow and
    Blustery then
    Mostly Clear

Detailed Forecast

Overnight
Mostly cloudy, with a low around 37. West northwest wind around 6 mph.
Sunday
Sunny, with a high near 60. Southwest wind 6 to 13 mph, with gusts as high as 22 mph.
Sunday Night
Clear, with a low around 42. South southwest wind 9 to 11 mph, with gusts as high as 21 mph.
Monday
Sunny, with a high near 70. South southwest wind 10 to 18 mph, with gusts as high as 32 mph.
Monday Night
Mostly clear, with a low around 58. South southwest wind 11 to 15 mph, with gusts as high as 25 mph.
Tuesday
A 50 percent chance of showers and thunderstorms after noon. Mostly cloudy, with a high near 75. Breezy, with a south southwest wind 11 to 20 mph, with gusts as high as 31 mph.
Tuesday Night
Showers and possibly a thunderstorm. Low around 55. Breezy, with a south southwest wind 17 to 22 mph, with gusts as high as 34 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Wednesday
Showers. High near 65. Breezy. Chance of precipitation is 100%.
Wednesday Night
A chance of rain and snow before midnight. Partly cloudy, with a low around 29. Blustery. Chance of precipitation is 30%.
Thursday
Mostly sunny, with a high near 47.
Thursday Night
Mostly cloudy, with a low around 39. Breezy.
Friday
Mostly sunny, with a high near 60. Breezy.
Friday Night
Mostly cloudy, with a low around 34.
Saturday
Mostly cloudy, with a high near 49.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Lerna IL
 39.42°N 88.28°W (Elev. 741 ft)
Last Update:
12:26 am CST Mar 8, 2026
Forecast Valid:
1am CST Mar 8, 2026-6pm CDT Mar 14, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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