Hazardous Weather Conditions
Current conditions at
Mattoon / Charleston, Coles County Memorial Airport (KMTO)
Lat: 39.48°NLon: 88.28°WElev: 722ft.
Partly Cloudy
72°F
22°C
| Humidity | 68% |
| Wind Speed | S 10 mph |
| Barometer | 29.95 in (1013.8 mb) |
| Dewpoint | 61°F (16°C) |
| Visibility | 10.00 mi |
| Last update | 17 Apr 10:53 am CDT |
Extended Forecast for
Sullivan IL
Today

High: 82 °F
Slight Chance
T-stormsTonight
Low: 48 °F
Showers
Likely then
ShowersSaturday
High: 57 °F
Showers
Likely then
Mostly SunnySaturday Night

Low: 36 °F
Mostly Clear
then Patchy
FrostSunday

High: 59 °F
Patchy Frost
then SunnySunday Night

Low: 36 °F
Mostly Clear
then Patchy
FrostMonday

High: 63 °F
Patchy Frost
then SunnyMonday Night

Low: 48 °F
Mostly Clear
Tuesday

High: 76 °F
Mostly Sunny
Detailed Forecast
Today
A 20 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 82. South wind 14 to 18 mph, with gusts as high as 30 mph.
Tonight
Showers and thunderstorms likely before midnight, then showers and possibly a thunderstorm between midnight and 4am, then showers after 4am. Low around 48. South wind 14 to 16 mph becoming west southwest after midnight. Winds could gust as high as 30 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
Saturday
Showers likely, mainly before 9am. Mostly cloudy, then gradually becoming sunny, with a high near 57. Northwest wind 15 to 18 mph, with gusts as high as 29 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Saturday Night
Patchy frost after 5am. Otherwise, mostly clear, with a low around 36. Northwest wind 7 to 14 mph, with gusts as high as 21 mph.
Sunday
Patchy frost before 8am. Otherwise, sunny, with a high near 59. West northwest wind 7 to 16 mph, with gusts as high as 26 mph.
Sunday Night
Patchy frost after 5am. Otherwise, mostly clear, with a low around 36. Northwest wind 6 to 9 mph becoming east after midnight. Winds could gust as high as 15 mph.
Monday
Patchy frost before 8am. Otherwise, sunny, with a high near 63. East wind 6 to 8 mph becoming south in the afternoon.
Monday Night
Mostly clear, with a low around 48.
Tuesday
Mostly sunny, with a high near 76.
Tuesday Night
Mostly clear, with a low around 54.
Wednesday
Sunny, with a high near 77.
Wednesday Night
Mostly clear, with a low around 56.
Thursday
Mostly sunny, with a high near 80.
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)
11:16 am CDT Apr 17, 2026
11am CDT Apr 17, 2026-6pm CDT Apr 23, 2026



