Current conditions at
Mattoon / Charleston, Coles County Memorial Airport (KMTO)
Lat: 39.48°NLon: 88.28°WElev: 722ft.
Fair
79°F
26°C
| Humidity | 35% |
| Wind Speed | S 8 mph |
| Barometer | 29.79 in (1008.6 mb) |
| Dewpoint | 49°F (9°C) |
| Visibility | 10.00 mi |
| Heat Index | 79°F (26°C) |
| Last update | 21 Mar 3:53 pm CDT |
Extended Forecast for
Sullivan IL
Tonight

Low: 60 °F
Mostly Clear
Sunday
High: 80 °F
Mostly Sunny
then Slight
Chance
Showers and
BreezySunday Night
Low: 32 °F
Slight Chance
Showers and
Breezy then
Partly CloudyMonday

High: 51 °F
Mostly Sunny
Monday Night

Low: 34 °F
Mostly Cloudy
Tuesday

High: 60 °F
Mostly Sunny
Tuesday Night

Low: 42 °F
Mostly Cloudy
Wednesday

High: 66 °F
Mostly Cloudy
Wednesday Night

Low: 51 °F
Mostly Cloudy
Detailed Forecast
Tonight
Mostly clear, with a low around 60. South southwest wind 7 to 11 mph, with gusts as high as 22 mph.
Sunday
A 20 percent chance of showers after 3pm. Increasing clouds, with a high near 80. Breezy, with a south southwest wind 11 to 16 mph becoming north 17 to 22 mph in the afternoon. Winds could gust as high as 30 mph.
Sunday Night
A 10 percent chance of showers before 7pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 32. Breezy, with a north wind 13 to 23 mph, with gusts as high as 36 mph.
Monday
Mostly sunny, with a high near 51. North wind around 10 mph, with gusts as high as 17 mph.
Monday Night
Mostly cloudy, with a low around 34. East wind around 6 mph.
Tuesday
Mostly sunny, with a high near 60. South wind 6 to 8 mph.
Tuesday Night
Mostly cloudy, with a low around 42. South southeast wind 5 to 7 mph.
Wednesday
Mostly cloudy, with a high near 66.
Wednesday Night
Mostly cloudy, with a low around 51.
Thursday
Mostly sunny, with a high near 76.
Thursday Night
A chance of rain and thunderstorms. Partly cloudy, with a low around 38.
Friday
A chance of rain. Partly sunny, with a high near 51.
Friday Night
Mostly cloudy, with a low around 32.
Saturday
Mostly sunny, with a high near 53.
Additional Forecasts and Information
Basemap Options
Click map to change the forecast location
Loading map...
ABOUT THIS FORECAST
Point Forecast:
Sullivan IL
39.59°N 88.61°W (Elev. 669 ft)
39.59°N 88.61°W (Elev. 669 ft)
1:26 pm CDT Mar 21, 2026
4pm CDT Mar 21, 2026-6pm CDT Mar 28, 2026


