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.

Overcast

14°F

-10°C

Humidity 73%
Wind Speed W 18 mph
Barometer 30.10 in (1020.5 mb)
Dewpoint 7°F (-14°C)
Visibility 10.00 mi
Wind Chill-3°F (-19°C)
Last update 17 Mar 4:53 am CDT
Extended Forecast for

Sullivan IL

  • Today

    Today: Partly sunny, with a high near 29. Wind chill values between -3 and 7. West northwest wind 7 to 15 mph, with gusts as high as 24 mph.

    High: 29 °F

    Partly Sunny

  • Tonight

    Tonight: Snow likely, mainly after midnight. Mostly cloudy, with a low around 25. South southeast wind 5 to 15 mph, with gusts as high as 28 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.

    Low: 25 °F

    Chance Snow
    then Snow
    Likely

  • Wednesday

    Wednesday: A 30 percent chance of snow before 7am. Mostly cloudy, then gradually becoming sunny, with a high near 55. South wind 10 to 16 mph, with gusts as high as 28 mph.

    High: 55 °F

    Chance Snow
    then Mostly
    Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 36. West wind around 6 mph becoming south after midnight.

    Low: 36 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly cloudy, then gradually becoming sunny, with a high near 63. South wind 6 to 8 mph.

    High: 63 °F

    Decreasing
    Clouds

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 42. Southeast wind around 6 mph.

    Low: 42 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 69. West southwest wind 6 to 9 mph, with gusts as high as 15 mph.

    High: 69 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 46.

    Low: 46 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 71.

    High: 71 °F

    Mostly Sunny

Detailed Forecast

Today
Partly sunny, with a high near 29. Wind chill values between -3 and 7. West northwest wind 7 to 15 mph, with gusts as high as 24 mph.
Tonight
Snow likely, mainly after midnight. Mostly cloudy, with a low around 25. South southeast wind 5 to 15 mph, with gusts as high as 28 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.
Wednesday
A 30 percent chance of snow before 7am. Mostly cloudy, then gradually becoming sunny, with a high near 55. South wind 10 to 16 mph, with gusts as high as 28 mph.
Wednesday Night
Mostly cloudy, with a low around 36. West wind around 6 mph becoming south after midnight.
Thursday
Mostly cloudy, then gradually becoming sunny, with a high near 63. South wind 6 to 8 mph.
Thursday Night
Partly cloudy, with a low around 42. Southeast wind around 6 mph.
Friday
Mostly sunny, with a high near 69. West southwest wind 6 to 9 mph, with gusts as high as 15 mph.
Friday Night
Mostly cloudy, with a low around 46.
Saturday
Mostly sunny, with a high near 71.
Saturday Night
Mostly clear, with a low around 48.
Sunday
Mostly sunny, with a high near 68.
Sunday Night
Mostly cloudy, with a low around 36.
Monday
Partly sunny, with a high near 51.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Sullivan IL
 39.59°N 88.61°W (Elev. 669 ft)
Last Update:
4:36 am CDT Mar 17, 2026
Forecast Valid:
5am CDT Mar 17, 2026-6pm CDT Mar 23, 2026
 
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Additional Resources

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Chance of Precipitation