Current conditions at
Mattoon / Charleston, Coles County Memorial Airport (KMTO)
Lat: 39.48°NLon: 88.28°WElev: 722ft.
Fair
23°F
-5°C
| Humidity | 85% |
| Wind Speed | N 7 mph |
| Barometer | 29.99 in (1016.6 mb) |
| Dewpoint | 19°F (-7°C) |
| Visibility | 9.00 mi |
| Wind Chill | 15°F (-9°C) |
| Last update | 3 Jan 4:53 am CST |
Extended Forecast for
Sullivan IL
Today

High: 35 °F
Becoming
SunnyTonight

Low: 19 °F
Partly Cloudy
Sunday

High: 36 °F
Increasing
CloudsSunday Night

Low: 27 °F
Decreasing
CloudsMonday

High: 50 °F
Mostly Sunny
Monday Night

Low: 38 °F
Mostly Cloudy
Tuesday

High: 57 °F
Mostly Sunny
Tuesday Night

Low: 34 °F
Mostly Cloudy
Wednesday

High: 55 °F
Mostly Sunny
Detailed Forecast
Today
Mostly cloudy through mid morning, then gradual clearing, with a high near 35. Northeast wind around 5 mph becoming light and variable in the afternoon.
Tonight
Partly cloudy, with a low around 19. North northwest wind around 5 mph becoming calm in the evening.
Sunday
Increasing clouds, with a high near 36. Calm wind becoming south southeast around 6 mph in the afternoon.
Sunday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 27. South wind 6 to 10 mph, with gusts as high as 17 mph.
Monday
Mostly sunny, with a high near 50. South southwest wind 7 to 10 mph, with gusts as high as 17 mph.
Monday Night
Mostly cloudy, with a low around 38. South wind around 7 mph.
Tuesday
Mostly sunny, with a high near 57. West southwest wind around 8 mph.
Tuesday Night
Mostly cloudy, with a low around 34.
Wednesday
Mostly sunny, with a high near 55.
Wednesday Night
A 30 percent chance of rain after midnight. Mostly cloudy, with a low around 42.
Thursday
Rain likely. Mostly cloudy, with a high near 60.
Thursday Night
A chance of rain. Mostly cloudy, with a low around 47.
Friday
A chance of rain. Partly sunny, with a high near 56.
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)
3:16 am CST Jan 3, 2026
5am CST Jan 3, 2026-6pm CST Jan 9, 2026


