National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Mattoon / Charleston, Coles County Memorial Airport (KMTO)

Lat: 39.48°NLon: 88.28°WElev: 722ft.

Fair

10°F

-12°C

Humidity 61%
Wind Speed Calm
Barometer 30.38 in (1030.2 mb)
Dewpoint -1°F (-18°C)
Visibility 10.00 mi
Last update 19 Jan 11:53 pm CST
Extended Forecast for

Sullivan IL

  • Overnight

    Overnight: Mostly cloudy, then gradually becoming mostly clear, with a low around 8. Wind chill values between -2 and 3. Southwest wind around 6 mph.

    Low: 8 °F

    Decreasing
    Clouds

  • Tuesday

    Tuesday: Mostly sunny, with a high near 30. Wind chill values between -1 and 9. South southwest wind 6 to 14 mph, with gusts as high as 21 mph.

    High: 30 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Increasing clouds, with a temperature rising to around 31 by 3am. South wind 9 to 18 mph, with gusts as high as 29 mph.

    Low: 25 °F⇑

    Increasing
    Clouds

  • Wednesday

    Wednesday: Mostly cloudy, then gradually becoming sunny, with a high near 39. West wind 9 to 17 mph, with gusts as high as 28 mph.

    High: 39 °F

    Decreasing
    Clouds

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 20. West southwest wind 8 to 11 mph, with gusts as high as 21 mph.

    Low: 20 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 30. West northwest wind 6 to 10 mph, with gusts as high as 16 mph.

    High: 30 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 5. Northwest wind 5 to 11 mph, with gusts as high as 17 mph.

    Low: 5 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly cloudy, with a high near 11.

    High: 11 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around -3.

    Low: -3 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, then gradually becoming mostly clear, with a low around 8. Wind chill values between -2 and 3. Southwest wind around 6 mph.
Tuesday
Mostly sunny, with a high near 30. Wind chill values between -1 and 9. South southwest wind 6 to 14 mph, with gusts as high as 21 mph.
Tuesday Night
Increasing clouds, with a temperature rising to around 31 by 3am. South wind 9 to 18 mph, with gusts as high as 29 mph.
Wednesday
Mostly cloudy, then gradually becoming sunny, with a high near 39. West wind 9 to 17 mph, with gusts as high as 28 mph.
Wednesday Night
Partly cloudy, with a low around 20. West southwest wind 8 to 11 mph, with gusts as high as 21 mph.
Thursday
Mostly sunny, with a high near 30. West northwest wind 6 to 10 mph, with gusts as high as 16 mph.
Thursday Night
Mostly cloudy, with a low around 5. Northwest wind 5 to 11 mph, with gusts as high as 17 mph.
Friday
Mostly cloudy, with a high near 11.
Friday Night
Mostly cloudy, with a low around -3.
Saturday
Mostly cloudy, with a high near 11.
Saturday Night
Partly cloudy, with a low around 0.
Sunday
Mostly sunny, with a high near 17.
Sunday Night
Partly cloudy, with a low around 6.
Monday
Sunny, with a high near 27.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Sullivan IL
 39.59°N 88.61°W (Elev. 669 ft)
Last Update:
11:36 pm CST Jan 19, 2026
Forecast Valid:
12am CST Jan 20, 2026-6pm CST Jan 26, 2026
 
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Additional Resources

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