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

50°F

10°C

Humidity 86%
Wind Speed NW 8 mph
Barometer 29.90 in (1012.4 mb)
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Wind Chill47°F (8°C)
Last update 26 Dec 7:53 pm CST
Extended Forecast for

Sullivan IL

  • Tonight

    Tonight: Patchy fog. Otherwise, mostly cloudy, with a low around 42. North wind 5 to 7 mph becoming light and variable.

    Low: 42 °F

    Patchy Fog

  • Saturday

    Saturday: Patchy fog before 9am. Otherwise, mostly cloudy, with a high near 56. Southeast wind 5 to 10 mph, with gusts as high as 18 mph.

    High: 56 °F

    Patchy Fog
    then Mostly
    Cloudy

  • Saturday Night

    Saturday Night: A chance of rain between midnight and 3am, then a chance of rain and thunderstorms after 3am. Cloudy, with a temperature rising to around 59 by 5am. South wind around 11 mph, with gusts as high as 20 mph. Chance of precipitation is 40%.

    Low: 53 °F⇑

    Cloudy then
    Chance Rain

  • Sunday

    Sunday: Rain. High near 67. South southwest wind 10 to 16 mph, with gusts as high as 26 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    High: 67 °F

    Rain Likely
    then Rain

  • Sunday Night

    Sunday Night: Rain likely before midnight. Mostly cloudy, with a low around 16. Blustery, with a west northwest wind 17 to 26 mph, with gusts as high as 36 mph. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 16 °F

    Blustery.
    Rain Likely
    then Mostly
    Cloudy

  • Monday

    Monday: Partly sunny, with a high near 23. Blustery, with a west northwest wind 20 to 26 mph, with gusts as high as 38 mph.

    High: 23 °F

    Partly Sunny
    and Blustery

  • Monday Night

    Monday Night: Mostly clear, with a low around 14. West northwest wind 10 to 15 mph, with gusts as high as 24 mph.

    Low: 14 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 30.

    High: 30 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 22.

    Low: 22 °F

    Partly Cloudy

Detailed Forecast

Tonight
Patchy fog. Otherwise, mostly cloudy, with a low around 42. North wind 5 to 7 mph becoming light and variable.
Saturday
Patchy fog before 9am. Otherwise, mostly cloudy, with a high near 56. Southeast wind 5 to 10 mph, with gusts as high as 18 mph.
Saturday Night
A chance of rain between midnight and 3am, then a chance of rain and thunderstorms after 3am. Cloudy, with a temperature rising to around 59 by 5am. South wind around 11 mph, with gusts as high as 20 mph. Chance of precipitation is 40%.
Sunday
Rain. High near 67. South southwest wind 10 to 16 mph, with gusts as high as 26 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Sunday Night
Rain likely before midnight. Mostly cloudy, with a low around 16. Blustery, with a west northwest wind 17 to 26 mph, with gusts as high as 36 mph. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.
Monday
Partly sunny, with a high near 23. Blustery, with a west northwest wind 20 to 26 mph, with gusts as high as 38 mph.
Monday Night
Mostly clear, with a low around 14. West northwest wind 10 to 15 mph, with gusts as high as 24 mph.
Tuesday
Mostly sunny, with a high near 30.
Tuesday Night
Partly cloudy, with a low around 22.
Wednesday
Partly sunny, with a high near 34.
Wednesday Night
Mostly cloudy, with a low around 13.
New Year's Day
Mostly sunny, with a high near 23.
Thursday Night
Mostly clear, with a low around 8.
Friday
Mostly sunny, with a high near 24.
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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:
5:02 pm CST Dec 26, 2025
Forecast Valid:
8pm CST Dec 26, 2025-6pm CST Jan 2, 2026
 
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Additional Resources

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Chance of Precipitation