Current conditions at
Mattoon / Charleston, Coles County Memorial Airport (KMTO)
Lat: 39.48°NLon: 88.28°WElev: 722ft.
Fair
55°F
13°C
| Humidity | 55% |
| Wind Speed | S 9 mph |
| Barometer | 30.00 in (1016.1 mb) |
| Dewpoint | 39°F (4°C) |
| Visibility | 10.00 mi |
| Wind Chill | 53°F (12°C) |
| Last update | 16 Feb 4:53 pm CST |
Extended Forecast for
Sullivan IL
Tonight
Low: 39 °F
Partly Cloudy
then Patchy
FogTuesday
High: 59 °F
Patchy Fog
then CloudyTuesday Night
Low: 52 °F
Breezy.
Cloudy then
Chance RainWednesday

High: 68 °F
Sunny
Wednesday Night

Low: 45 °F
Increasing
CloudsThursday
High: 67 °F
Partly Sunny
then Rain
LikelyThursday Night
Low: 35 °F
Chance Rain
then Mostly
ClearFriday

High: 47 °F
Mostly Sunny
and BreezyFriday Night

Low: 28 °F
Mostly Cloudy
Detailed Forecast
Tonight
Patchy fog after 2am. Otherwise, partly cloudy, with a low around 39. South wind 7 to 9 mph, with gusts as high as 16 mph.
Tuesday
Patchy fog before 10am. Otherwise, mostly cloudy, with a high near 59. South wind 8 to 16 mph, with gusts as high as 29 mph.
Tuesday Night
A 40 percent chance of rain after midnight. Cloudy, then gradually becoming partly cloudy, with a low around 52. Breezy, with a south wind 16 to 21 mph, with gusts as high as 32 mph.
Wednesday
Sunny, with a high near 68. West southwest wind 9 to 18 mph, with gusts as high as 30 mph.
Wednesday Night
Increasing clouds, with a low around 45. Southwest wind around 7 mph becoming south southeast after midnight.
Thursday
Rain likely after noon. Partly sunny, with a high near 67. South wind 8 to 16 mph, with gusts as high as 24 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Thursday Night
A 50 percent chance of rain before midnight. Partly cloudy, with a low around 35. South wind 10 to 16 mph becoming west after midnight. Winds could gust as high as 24 mph.
Friday
Mostly sunny, with a high near 47. Breezy.
Friday Night
Mostly cloudy, with a low around 28.
Saturday
Partly sunny, with a high near 44.
Saturday Night
Partly cloudy, with a low around 25.
Sunday
Mostly sunny, with a high near 38.
Sunday Night
Partly cloudy, with a low around 18.
Monday
Mostly sunny, with a high near 37.
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)
5:36 pm CST Feb 16, 2026
5pm CST Feb 16, 2026-6pm CST Feb 23, 2026


