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

53°F

12°C

Humidity 83%
Wind Speed S 13 mph
Barometer 29.64 in (1003.6 mb)
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Wind Chill49°F (9°C)
Last update 18 Feb 1:53 am CST
Extended Forecast for

Sullivan IL

  • Overnight

    Overnight: A 30 percent chance of showers, mainly before 3am. Mostly cloudy, with a low around 52. South southwest wind around 17 mph, with gusts as high as 32 mph.

    Low: 52 °F

    Chance
    Showers

  • Wednesday

    Wednesday: Sunny, with a high near 67. West wind 10 to 17 mph, with gusts as high as 30 mph.

    High: 67 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Increasing clouds, with a low around 47. Southwest wind 6 to 8 mph becoming south southeast after midnight.

    Low: 47 °F

    Increasing
    Clouds

  • Thursday

    Thursday: A chance of showers, then showers and thunderstorms likely after noon. Partly sunny, with a high near 65. South wind 7 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 65 °F

    Chance
    Showers then
    T-storms
    Likely

  • Thursday Night

    Thursday Night: A 30 percent chance of showers before midnight. Partly cloudy, with a low around 35. South wind 10 to 18 mph becoming west after midnight. Winds could gust as high as 29 mph.

    Low: 35 °F

    Chance
    Showers then
    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 44. Breezy, with a west wind 16 to 21 mph decreasing to 10 to 15 mph in the afternoon. Winds could gust as high as 32 mph.

    High: 44 °F

    Sunny and
    Breezy

  • Friday Night

    Friday Night: Mostly clear, with a low around 26. North northwest wind 6 to 8 mph.

    Low: 26 °F

    Mostly Clear

  • Saturday

    Saturday: A 30 percent chance of snow after noon. Mostly sunny, with a high near 38.

    High: 38 °F

    Partly Sunny
    then Chance
    Snow

  • Saturday Night

    Saturday Night: A 30 percent chance of snow before midnight. Partly cloudy, with a low around 21.

    Low: 21 °F

    Chance Snow
    then Partly
    Cloudy

Detailed Forecast

Overnight
A 30 percent chance of showers, mainly before 3am. Mostly cloudy, with a low around 52. South southwest wind around 17 mph, with gusts as high as 32 mph.
Wednesday
Sunny, with a high near 67. West wind 10 to 17 mph, with gusts as high as 30 mph.
Wednesday Night
Increasing clouds, with a low around 47. Southwest wind 6 to 8 mph becoming south southeast after midnight.
Thursday
A chance of showers, then showers and thunderstorms likely after noon. Partly sunny, with a high near 65. South wind 7 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday Night
A 30 percent chance of showers before midnight. Partly cloudy, with a low around 35. South wind 10 to 18 mph becoming west after midnight. Winds could gust as high as 29 mph.
Friday
Sunny, with a high near 44. Breezy, with a west wind 16 to 21 mph decreasing to 10 to 15 mph in the afternoon. Winds could gust as high as 32 mph.
Friday Night
Mostly clear, with a low around 26. North northwest wind 6 to 8 mph.
Saturday
A 30 percent chance of snow after noon. Mostly sunny, with a high near 38.
Saturday Night
A 30 percent chance of snow before midnight. Partly cloudy, with a low around 21.
Sunday
Mostly sunny, with a high near 33.
Sunday Night
Mostly clear, with a low around 16.
Monday
Sunny, with a high near 32.
Monday Night
Mostly clear, with a low around 17.
Tuesday
Mostly sunny, with a high near 40.
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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:
2:36 am CST Feb 18, 2026
Forecast Valid:
2am CST Feb 18, 2026-6pm CST Feb 24, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation