Hazardous Weather Conditions

Current conditions at

Mattoon / Charleston, Coles County Memorial Airport (KMTO)

Lat: 39.48°NLon: 88.28°WElev: 722ft.

Overcast

27°F

-3°C

Humidity 66%
Wind Speed S 14 G 20 mph
Barometer 30.16 in (1022.1 mb)
Dewpoint 17°F (-8°C)
Visibility 10.00 mi
Wind Chill16°F (-9°C)
Last update 18 Mar 12:53 am CDT
Extended Forecast for

Sullivan IL

  • Overnight

    Overnight: A 50 percent chance of snow, mainly before 4am.  Mostly cloudy, with a low around 25. South southeast wind 8 to 13 mph, with gusts as high as 22 mph.

    Low: 25 °F

    Chance Snow

  • Wednesday

    Wednesday: Mostly cloudy through mid morning, then gradual clearing, with a high near 53. South wind 10 to 14 mph becoming west southwest in the afternoon. Winds could gust as high as 23 mph.

    High: 53 °F

    Becoming
    Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 37. Light and variable wind becoming south around 6 mph in the evening.

    Low: 37 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly cloudy, then gradually becoming sunny, with a high near 64. South wind 6 to 9 mph becoming west in the afternoon.

    High: 64 °F

    Decreasing
    Clouds

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 38. North northeast wind around 6 mph.

    Low: 38 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 66. East wind 5 to 9 mph becoming west southwest in the afternoon.

    High: 66 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 45. West southwest wind around 8 mph.

    Low: 45 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 74.

    High: 74 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 51.

    Low: 51 °F

    Mostly Clear

Detailed Forecast

Overnight
A 50 percent chance of snow, mainly before 4am. Mostly cloudy, with a low around 25. South southeast wind 8 to 13 mph, with gusts as high as 22 mph.
Wednesday
Mostly cloudy through mid morning, then gradual clearing, with a high near 53. South wind 10 to 14 mph becoming west southwest in the afternoon. Winds could gust as high as 23 mph.
Wednesday Night
Mostly cloudy, with a low around 37. Light and variable wind becoming south around 6 mph in the evening.
Thursday
Mostly cloudy, then gradually becoming sunny, with a high near 64. South wind 6 to 9 mph becoming west in the afternoon.
Thursday Night
Partly cloudy, with a low around 38. North northeast wind around 6 mph.
Friday
Mostly sunny, with a high near 66. East wind 5 to 9 mph becoming west southwest in the afternoon.
Friday Night
Partly cloudy, with a low around 45. West southwest wind around 8 mph.
Saturday
Mostly sunny, with a high near 74.
Saturday Night
Mostly clear, with a low around 51.
Sunday
Mostly sunny, with a high near 72.
Sunday Night
Partly cloudy, with a low around 35.
Monday
Mostly sunny, with a high near 50.
Monday Night
Partly cloudy, with a low around 31.
Tuesday
Mostly sunny, with a high near 53.
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ABOUT THIS FORECAST

 
Point Forecast:
Sullivan IL
 39.59°N 88.61°W (Elev. 669 ft)
12:36 am CDT Mar 18, 2026
12am CDT Mar 18, 2026-6pm CDT Mar 24, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database