Current conditions at
Mattoon / Charleston, Coles County Memorial Airport (KMTO)
Lat: 39.48°NLon: 88.28°WElev: 722ft.
Fair
24°F
-4°C
| Humidity | 81% |
| Wind Speed | S 13 mph |
| Barometer | 29.84 in (1011.3 mb) |
| Dewpoint | 19°F (-7°C) |
| Visibility | 8.00 mi |
| Wind Chill | 12°F (-11°C) |
| Last update | 5 Feb 11:53 pm CST |
Extended Forecast for
Sullivan IL
Overnight

Low: 23 °F
Partly Cloudy
Friday
High: 38 °F
Partly Sunny
then Mostly
Cloudy and
BreezyFriday Night

Low: 13 °F
Decreasing
CloudsSaturday

High: 26 °F
Sunny
Saturday Night

Low: 18 °F
Mostly Cloudy
Sunday

High: 38 °F
Partly Sunny
Sunday Night

Low: 22 °F
Partly Cloudy
Monday

High: 45 °F
Sunny
Monday Night

Low: 32 °F
Mostly Clear
Detailed Forecast
Overnight
Partly cloudy, with a low around 23. West southwest wind 6 to 8 mph.
Friday
Mostly cloudy, with a high near 38. Breezy, with a west southwest wind 8 to 13 mph becoming north northwest 15 to 20 mph in the morning. Winds could gust as high as 30 mph.
Friday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 13. Wind chill values between 4 and 9. North wind 8 to 14 mph, with gusts as high as 22 mph.
Saturday
Sunny, with a high near 26. Wind chill values between 4 and 14. North northeast wind 5 to 7 mph becoming light and variable in the afternoon.
Saturday Night
Mostly cloudy, with a low around 18. Light southeast wind becoming south southeast 5 to 9 mph in the evening. Winds could gust as high as 15 mph.
Sunday
Partly sunny, with a high near 38. South southeast wind 7 to 10 mph, with gusts as high as 16 mph.
Sunday Night
Partly cloudy, with a low around 22. Southeast wind around 6 mph.
Monday
Sunny, with a high near 45.
Monday Night
Mostly clear, with a low around 32.
Tuesday
Mostly sunny, with a high near 56.
Tuesday Night
A chance of rain. Mostly cloudy, with a low around 38.
Wednesday
A chance of rain. Cloudy, with a high near 49.
Wednesday Night
A chance of rain. Cloudy, with a low around 31.
Thursday
A chance of rain. Mostly cloudy, with a high near 44.
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)
11:37 pm CST Feb 5, 2026
12am CST Feb 6, 2026-6pm CST Feb 12, 2026


