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Hazardous Weather Conditions
Current conditions at
Mattoon / Charleston, Coles County Memorial Airport (KMTO)
Lat: 39.48°NLon: 88.28°WElev: 722ft.
Overcast
68°F
20°C
| Humidity | 84% |
| Wind Speed | E 10 mph |
| Barometer | 30.08 in (1018.1 mb) |
| Dewpoint | 63°F (17°C) |
| Visibility | 9.00 mi |
| Last update | 15 Oct 1:53 am CDT |
Extended Forecast for
Sullivan IL
Overnight
Low: 62 °F
Slight Chance
ShowersThursday
High: 77 °F
Showers
Thursday Night
Low: 46 °F
Showers
LikelyFriday
High: 56 °F
Breezy.
Mostly Cloudy
then Chance
ShowersFriday Night
Low: 36 °F
Gradual
ClearingSaturday
High: 59 °F
Areas Frost
then SunnySaturday Night
Low: 34 °F
Clear then
Areas FrostSunday
High: 68 °F
Frost then
SunnySunday Night
Low: 37 °F
Mostly Clear
Detailed Forecast
Overnight
A 20 percent chance of showers. Mostly cloudy, with a low around 62. East northeast wind around 7 mph.
Thursday
Showers and thunderstorms likely, then showers and possibly a thunderstorm after 3pm. High near 77. East wind 6 to 11 mph becoming south in the afternoon. Winds could gust as high as 18 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday Night
Showers likely and possibly a thunderstorm before 3am, then a chance of showers. Increasing clouds, with a low around 46. Southwest wind 11 to 18 mph becoming west northwest after midnight. Winds could gust as high as 26 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday
A 30 percent chance of showers after 5pm. Partly sunny, with a high near 56. Breezy, with a northwest wind 18 to 20 mph, with gusts as high as 31 mph.
Friday Night
Cloudy during the early evening, then gradual clearing, with a low around 36. North wind 10 to 15 mph, with gusts as high as 22 mph.
Saturday
Areas of frost before 8am. Otherwise, sunny, with a high near 59. North northeast wind 3 to 7 mph.
Saturday Night
Areas of frost after 2am. Otherwise, clear, with a low around 34. Light and variable wind.
Sunday
Widespread frost, mainly before 7am. Otherwise, sunny, with a high near 68.
Sunday Night
Mostly clear, with a low around 37.
Monday
Mostly sunny, with a high near 73.
Monday Night
Partly cloudy, with a low around 40.
Tuesday
Mostly sunny, with a high near 74.
Tuesday Night
Mostly clear, with a low around 42.
Wednesday
Sunny, with a high near 76.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
Sullivan IL
39.61°N 88.61°W (Elev. 669 ft)
39.61°N 88.61°W (Elev. 669 ft)
1:55 am CDT Oct 15, 2026
2am CDT Oct 15, 2026-6pm CDT Oct 21, 2026
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