Hazardous Weather Conditions
Current conditions at
Mattoon / Charleston, Coles County Memorial Airport (KMTO)
Lat: 39.48°NLon: 88.28°WElev: 722ft.
Fair
64°F
18°C
| Humidity | 50% |
| Wind Speed | S 14 G 23 mph |
| Barometer | 30.12 in (1019.5 mb) |
| Dewpoint | 45°F (7°C) |
| Visibility | 10.00 mi |
| Last update | 10 Apr 12:53 am CDT |
Extended Forecast for
Sullivan IL
Overnight

Low: 58 °F
Mostly Cloudy
Friday

High: 66 °F
Chance
T-stormsFriday Night

Low: 44 °F
Decreasing
CloudsSaturday

High: 66 °F
Increasing
CloudsSaturday Night

Low: 57 °F
Mostly Cloudy
Sunday

High: 79 °F
Partly Sunny
and BreezySunday Night

Low: 62 °F
Chance
ShowersMonday
High: 80 °F
Chance
Showers then
Chance
T-stormsMonday Night

Low: 65 °F
Chance
Showers
Detailed Forecast
Overnight
Mostly cloudy, with a low around 58. South southwest wind around 15 mph, with gusts as high as 25 mph.
Friday
A chance of showers and thunderstorms before 4pm, then a slight chance of showers. Mostly cloudy, with a high near 66. Southwest wind 10 to 14 mph becoming north northwest in the afternoon. Winds could gust as high as 24 mph. Chance of precipitation is 40%.
Friday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 44. East northeast wind 7 to 9 mph, with gusts as high as 16 mph.
Saturday
Increasing clouds, with a high near 66. Southeast wind 8 to 10 mph, with gusts as high as 17 mph.
Saturday Night
Mostly cloudy, with a low around 57. Southeast wind 8 to 11 mph, with gusts as high as 20 mph.
Sunday
Partly sunny, with a high near 79. Breezy, with a south southwest wind 13 to 23 mph, with gusts as high as 38 mph.
Sunday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 62. South southwest wind 16 to 18 mph, with gusts as high as 30 mph.
Monday
A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 80. Chance of precipitation is 30%.
Monday Night
A 30 percent chance of showers before 1am. Mostly cloudy, with a low around 65.
Tuesday
A 50 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 82.
Tuesday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 64.
Wednesday
A chance of showers. Partly sunny, with a high near 79.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 57.
Thursday
A chance of showers. Partly sunny, with a high near 77.
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)
1:01 am CDT Apr 10, 2026
1am CDT Apr 10, 2026-6pm CDT Apr 16, 2026



