Current conditions at
Mattoon / Charleston, Coles County Memorial Airport (KMTO)
Lat: 39.48°NLon: 88.28°WElev: 722ft.
Fair
83°F
28°C
| Humidity | 43% |
| Wind Speed | Vrbl 3 mph |
| Barometer | 30.10 in (1018.9 mb) |
| Dewpoint | 58°F (14°C) |
| Visibility | 10.00 mi |
| Heat Index | 83°F (28°C) |
| Last update | 28 Aug 4:53 pm CDT |
Extended Forecast for
Sullivan IL
Tonight
Low: 60 °F
Mostly Clear
Saturday
High: 86 °F
Mostly Sunny
Saturday Night
Low: 67 °F
Partly Cloudy
Sunday
High: 91 °F
Mostly Sunny
Sunday Night
Low: 72 °F
Mostly Clear
Monday
High: 96 °F
Hot
Monday Night
Low: 74 °F
Mostly Clear
Tuesday
High: 98 °F
Hot
Tuesday Night
Low: 76 °F
Mostly Clear
Detailed Forecast
Tonight
Mostly clear, with a low around 60. Light and variable wind.
Saturday
Mostly sunny, with a high near 86. South southeast wind 3 to 6 mph.
Saturday Night
Partly cloudy, with a low around 67. South southeast wind around 6 mph.
Sunday
Mostly sunny, with a high near 91. South southwest wind 7 to 14 mph, with gusts as high as 21 mph.
Sunday Night
Mostly clear, with a low around 72. South wind 6 to 8 mph.
Monday
Sunny and hot, with a high near 96. South southwest wind 8 to 11 mph, with gusts as high as 17 mph.
Monday Night
Mostly clear, with a low around 74. South southwest wind around 7 mph.
Tuesday
Sunny and hot, with a high near 98.
Tuesday Night
Mostly clear, with a low around 76.
Wednesday
Sunny and hot, with a high near 97.
Wednesday Night
Mostly clear, with a low around 75.
Thursday
Sunny and hot, with a high near 96.
Thursday Night
Mostly clear, with a low around 73.
Friday
Mostly sunny and hot, with a high near 95.
Additional Forecasts and Information
Basemap Options
Click map to change the forecast location
Loading map...
Forecast AreaABOUT THIS FORECAST
Point Forecast:
Sullivan IL
39.59°N 88.61°W (Elev. 669 ft)
39.59°N 88.61°W (Elev. 669 ft)
5:01 pm CDT Aug 28, 2026
5pm CDT Aug 28, 2026-6pm CDT Sep 4, 2026
Additional Resources
Radar & Satellite Image
Hourly Weather Forecast
