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

56°F

13°C

Humidity 100%
Wind Speed S 7 mph
Barometer 30.05 in (1017.8 mb)
Dewpoint 56°F (13°C)
Visibility 0.25 mi
Last update 24 Dec 8:53 pm CST
Extended Forecast for

Lerna IL

Dense Fog Advisory until December 25, 10:00am
Click here for hazard details and duration
Dense Fog Advisory
  •  
    Dense Fog Advisory until December 25, 10:00am

    NOW until 10:00am Thu

    Dense Fog Advisory

  • Tonight

    Low: 51 °F

    Chance
    Drizzle and
    Dense Fog

  • Christmas Day

    Christmas Day: Widespread dense fog, mainly before 7am. Otherwise, cloudy, with a high near 54. North northwest wind 5 to 8 mph becoming east in the afternoon.

    High: 54 °F

    Dense Fog
    then Cloudy

  • Thursday Night

    Thursday Night: Patchy fog after midnight. Otherwise, cloudy, with a low around 52. East wind 6 to 10 mph becoming south after midnight. Winds could gust as high as 18 mph.

    Low: 52 °F

    Cloudy then
    Patchy Fog

  • Friday

    Friday: Mostly sunny, with a high near 66. South wind 8 to 14 mph becoming west northwest in the afternoon. Winds could gust as high as 21 mph.

    High: 66 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 43. West northwest wind around 6 mph becoming calm in the evening.

    Low: 43 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 59. Light east wind becoming southeast 5 to 9 mph in the morning. Winds could gust as high as 15 mph.

    High: 59 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 50. Southeast wind around 10 mph becoming southwest after midnight. Winds could gust as high as 17 mph.

    Low: 50 °F

    Mostly Cloudy

  • Sunday

    Sunday: Rain likely, mainly after noon. Cloudy, with a high near 59. Chance of precipitation is 60%.

    High: 59 °F

    Chance Rain
    then Rain
    Likely

Detailed Forecast

Tonight
A chance of drizzle, mainly before 1am. Widespread dense fog, mainly after 11pm. Otherwise, cloudy, with a low around 51. South southwest wind 5 to 7 mph becoming northwest after midnight.
Christmas Day
Widespread dense fog, mainly before 7am. Otherwise, cloudy, with a high near 54. North northwest wind 5 to 8 mph becoming east in the afternoon.
Thursday Night
Patchy fog after midnight. Otherwise, cloudy, with a low around 52. East wind 6 to 10 mph becoming south after midnight. Winds could gust as high as 18 mph.
Friday
Mostly sunny, with a high near 66. South wind 8 to 14 mph becoming west northwest in the afternoon. Winds could gust as high as 21 mph.
Friday Night
Partly cloudy, with a low around 43. West northwest wind around 6 mph becoming calm in the evening.
Saturday
Partly sunny, with a high near 59. Light east wind becoming southeast 5 to 9 mph in the morning. Winds could gust as high as 15 mph.
Saturday Night
Mostly cloudy, with a low around 50. Southeast wind around 10 mph becoming southwest after midnight. Winds could gust as high as 17 mph.
Sunday
Rain likely, mainly after noon. Cloudy, with a high near 59. Chance of precipitation is 60%.
Sunday Night
A 30 percent chance of rain before midnight. Mostly cloudy, with a low around 16. Blustery.
Monday
Sunny, with a high near 24. Blustery.
Monday Night
Mostly clear, with a low around 15.
Tuesday
Mostly sunny, with a high near 30.
Tuesday Night
Partly cloudy, with a low around 20.
Wednesday
Partly sunny, with a high near 33.
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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:
8:36 pm CST Dec 24, 2025
Forecast Valid:
9pm CST Dec 24, 2025-6pm CST Dec 31, 2025
 
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