Current conditions at
Mattoon / Charleston, Coles County Memorial Airport (KMTO)
Lat: 39.48°NLon: 88.28°WElev: 722ft.
Light Rain
61°F
16°C
| Humidity | 93% |
| Wind Speed | S 10 mph |
| Barometer | 29.82 in (1009.6 mb) |
| Dewpoint | 59°F (15°C) |
| Visibility | 10.00 mi |
| Last update | 16 Apr 5:53 am CDT |
Extended Forecast for
Sullivan IL
Today
High: 78 °F
Chance
Showers then
SunnyTonight
Low: 56 °F
Mostly Clear
Friday
High: 82 °F
Partly Sunny
then Slight
Chance
T-stormsFriday Night
Low: 50 °F
T-storms
Saturday
High: 60 °F
Chance
ShowersSaturday Night
Low: 36 °F
Mostly Clear
then Patchy
FrostSunday
High: 58 °F
Patchy Frost
then SunnySunday Night
Low: 37 °F
Mostly Clear
Monday
High: 65 °F
Sunny
Detailed Forecast
Today
A 40 percent chance of showers, mainly before 7am. Cloudy through mid morning, then gradual clearing, with a high near 78. West wind 11 to 15 mph, with gusts as high as 25 mph.
Tonight
Mostly clear, with a low around 56. West wind 5 to 7 mph becoming south after midnight.
Friday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 82. South wind 6 to 11 mph increasing to 13 to 18 mph in the afternoon. Winds could gust as high as 30 mph.
Friday Night
Showers likely and possibly a thunderstorm before 10pm, then showers and thunderstorms likely between 10pm and 1am, then showers and possibly a thunderstorm after 1am. Low around 50. South wind around 15 mph, with gusts as high as 24 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
Saturday
A 50 percent chance of showers before 1pm. Mostly cloudy, then gradually becoming sunny, with a high near 60. West northwest wind 15 to 18 mph, with gusts as high as 28 mph.
Saturday Night
Patchy frost after 3am. Otherwise, mostly clear, with a low around 36. West northwest wind 9 to 13 mph, with gusts as high as 21 mph.
Sunday
Patchy frost before 8am. Otherwise, sunny, with a high near 58. West northwest wind 8 to 16 mph, with gusts as high as 25 mph.
Sunday Night
Mostly clear, with a low around 37.
Monday
Sunny, with a high near 65.
Monday Night
Mostly clear, with a low around 48.
Tuesday
Mostly sunny, with a high near 72.
Tuesday Night
Partly cloudy, with a low around 52.
Wednesday
Sunny, with a high near 75.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
Sullivan IL
39.59°N 88.61°W (Elev. 669 ft)
39.59°N 88.61°W (Elev. 669 ft)
5:11 am CDT Apr 16, 2026
6am CDT Apr 16, 2026-6pm CDT Apr 22, 2026
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