Current conditions at
Mattoon / Charleston, Coles County Memorial Airport (KMTO)
Lat: 39.48°NLon: 88.28°WElev: 722ft.
Fair
44°F
7°C
| Humidity | 68% |
| Wind Speed | SW 9 mph |
| Barometer | 30.22 in (1023.6 mb) |
| Dewpoint | 34°F (1°C) |
| Visibility | 10.00 mi |
| Wind Chill | 39°F (4°C) |
| Last update | 6 Apr 2:53 am CDT |
Extended Forecast for
Sullivan IL
Overnight

Low: 39 °F
Clear
Monday

High: 57 °F
Sunny
Monday Night

Low: 33 °F
Increasing
CloudsTuesday

High: 47 °F
Mostly Cloudy
Tuesday Night

Low: 35 °F
Mostly Cloudy
Wednesday

High: 68 °F
Partly Sunny
Wednesday Night

Low: 50 °F
Partly Cloudy
Thursday
High: 67 °F
Mostly Sunny
then Chance
ShowersThursday Night

Low: 53 °F
Chance
T-storms
Detailed Forecast
Overnight
Clear, with a low around 39. West southwest wind around 8 mph, with gusts as high as 18 mph.
Monday
Sunny, with a high near 57. Northwest wind 10 to 15 mph, with gusts as high as 24 mph.
Monday Night
Increasing clouds, with a low around 33. North northeast wind 8 to 10 mph, with gusts as high as 16 mph.
Tuesday
Mostly cloudy, with a high near 47. East northeast wind 8 to 10 mph, with gusts as high as 16 mph.
Tuesday Night
Mostly cloudy, with a low around 35. East wind 7 to 10 mph, with gusts as high as 18 mph.
Wednesday
Partly sunny, with a high near 68. Southeast wind 10 to 16 mph, with gusts as high as 26 mph.
Wednesday Night
Partly cloudy, with a low around 50. South wind around 14 mph, with gusts as high as 23 mph.
Thursday
A 30 percent chance of showers after 1pm. Mostly sunny, with a high near 67.
Thursday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 53.
Friday
A 50 percent chance of showers. Mostly cloudy, with a high near 68.
Friday Night
A chance of showers. Mostly cloudy, with a low around 50.
Saturday
A chance of showers. Partly sunny, with a high near 73.
Saturday Night
Mostly cloudy, with a low around 58.
Sunday
A chance of showers. Mostly cloudy, with a high near 78.
Additional Forecasts and Information
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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 am CDT Apr 6, 2026
3am CDT Apr 6, 2026-6pm CDT Apr 12, 2026


