Hazardous Weather Conditions
Current conditions at
Mattoon / Charleston, Coles County Memorial Airport (KMTO)
Lat: 39.48°NLon: 88.28°WElev: 722ft.
Fair
78°F
26°C
| Humidity | 60% |
| Wind Speed | S 15 G 32 mph |
| Barometer | 29.73 in (1006.2 mb) |
| Dewpoint | 63°F (17°C) |
| Visibility | 10.00 mi |
| Heat Index | 80°F (27°C) |
| Last update | 17 Apr 6:53 pm CDT |
Extended Forecast for
Lerna IL
Flood Watch until April 18, 04:00am
NOW until 4:00am Sat
Flood Watch
Tonight
Low: 49 °F
Showers
Likely then
ShowersSaturday
High: 55 °F
Showers
Likely then
Mostly SunnySaturday Night
Low: 36 °F
Mostly Clear
then Patchy
FrostSunday
High: 60 °F
Patchy Frost
then Mostly
SunnySunday Night
Low: 36 °F
Mostly Clear
then Patchy
FrostMonday
High: 60 °F
Patchy Frost
then SunnyMonday Night
Low: 47 °F
Mostly Clear
Tuesday
High: 75 °F
Mostly Sunny
Detailed Forecast
Tonight
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 11pm. Low around 49. South wind 14 to 16 mph becoming west southwest after midnight. Winds could gust as high as 29 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
Saturday
Showers likely and possibly a thunderstorm before 9am, then a slight chance of showers between 9am and 10am. Mostly cloudy, then gradually becoming sunny, with a high near 55. Northwest wind 15 to 18 mph, with gusts as high as 29 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday Night
Patchy frost after 2am. Otherwise, mostly clear, with a low around 36. Northwest wind 7 to 14 mph becoming west southwest after midnight. Winds could gust as high as 22 mph.
Sunday
Patchy frost before 9am. Otherwise, sunny, with a high near 60. West wind 7 to 16 mph, with gusts as high as 28 mph.
Sunday Night
Patchy frost after 2am. Otherwise, mostly clear, with a low around 36. Northwest wind 6 to 10 mph becoming north northeast after midnight. Winds could gust as high as 17 mph.
Monday
Patchy frost before 9am. Otherwise, sunny, with a high near 60. East northeast wind around 7 mph becoming south in the afternoon.
Monday Night
Mostly clear, with a low around 47. South southeast wind 6 to 10 mph, with gusts as high as 20 mph.
Tuesday
Mostly sunny, with a high near 75.
Tuesday Night
Partly cloudy, with a low around 55.
Wednesday
Sunny, with a high near 78.
Wednesday Night
Mostly clear, with a low around 57.
Thursday
Sunny, with a high near 79.
Thursday Night
A chance of showers. Partly cloudy, with a low around 62.
Friday
A chance of showers and thunderstorms. Partly sunny, with a high near 76.
Additional Forecasts and Information
Basemap Options
Click map to change the forecast location
Loading map...
Forecast AreaABOUT THIS FORECAST
Point Forecast:
Lerna IL
39.42°N 88.28°W (Elev. 741 ft)
39.42°N 88.28°W (Elev. 741 ft)
6:36 pm CDT Apr 17, 2026
7pm CDT Apr 17, 2026-6pm CDT Apr 24, 2026
Additional Resources
Radar & Satellite Image
Hourly Weather Forecast
