Hazardous Weather Conditions
Current conditions at
Mattoon / Charleston, Coles County Memorial Airport (KMTO)
Lat: 39.48°NLon: 88.28°WElev: 722ft.
Fair
10°F
-12°C
| Humidity | 63% |
| Wind Speed | SW 3 mph |
| Barometer | 30.39 in (1030.7 mb) |
| Dewpoint | 0°F (-18°C) |
| Visibility | 10.00 mi |
| Last update | 20 Jan 3:53 am CST |
Extended Forecast for
Sullivan IL
Today

High: 29 °F
Mostly Sunny
Tonight

Low: 23 °F
Mostly Cloudy
Wednesday

High: 40 °F
Decreasing
CloudsWednesday Night

Low: 20 °F
Partly Cloudy
Thursday

High: 30 °F
Mostly Sunny
Thursday Night

Low: 5 °F
Mostly Cloudy
Friday

High: 11 °F
Mostly Cloudy
Friday Night

Low: -1 °F
Mostly Cloudy
Saturday
High: 12 °F
Mostly Cloudy
then Chance
Snow
Detailed Forecast
Today
Mostly sunny, with a high near 29. Wind chill values between -1 and 9. South southwest wind 6 to 14 mph, with gusts as high as 23 mph.
Tonight
Mostly cloudy, with a low around 23. South wind 13 to 17 mph, with gusts as high as 28 mph.
Wednesday
Mostly cloudy, then gradually becoming sunny, with a high near 40. West wind 9 to 16 mph, with gusts as high as 28 mph.
Wednesday Night
Partly cloudy, with a low around 20. West southwest wind 8 to 14 mph, with gusts as high as 26 mph.
Thursday
Mostly sunny, with a high near 30. West northwest wind 6 to 10 mph, with gusts as high as 17 mph.
Thursday Night
Mostly cloudy, with a low around 5. West northwest wind 5 to 10 mph, with gusts as high as 16 mph.
Friday
Mostly cloudy, with a high near 11. North wind 10 to 13 mph, with gusts as high as 20 mph.
Friday Night
Mostly cloudy, with a low around -1.
Saturday
A 30 percent chance of snow after noon. Mostly cloudy, with a high near 12.
Saturday Night
A 30 percent chance of snow before midnight. Mostly cloudy, with a low around 3.
Sunday
Mostly sunny, with a high near 20.
Sunday Night
Partly cloudy, with a low around 2.
Monday
Sunny, with a high near 22.
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)
3:36 am CST Jan 20, 2026
4am CST Jan 20, 2026-6pm CST Jan 26, 2026



