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.

Fog/Mist

49°F

9°C

Humidity 93%
Wind Speed SE 5 mph
Barometer 30.05 in (1017.7 mb)
Dewpoint 47°F (8°C)
Visibility 3.00 mi
Wind Chill47°F (8°C)
Last update 20 Nov 12:53 pm CST
Extended Forecast for

Sullivan IL

  • This Afternoon

    This Afternoon: Patchy fog after 5pm. Otherwise, cloudy, with a high near 53. South southeast wind 5 to 7 mph.

    High: 53 °F

    Patchy Fog

  • Tonight

    Tonight: A 50 percent chance of rain, mainly after 2am. Patchy fog after 9pm. Otherwise, cloudy, with a low around 48. Southeast wind around 5 mph becoming calm in the evening.

    Low: 48 °F

    Chance Rain
    and Patchy
    Fog

  • Friday

    Friday: Rain likely. Patchy fog before 10am. Otherwise, cloudy, with a high near 55. East northeast wind 5 to 11 mph, with gusts as high as 17 mph. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.

    High: 55 °F

    Rain Likely
    and Patchy
    Fog

  • Friday Night

    Friday Night: A 50 percent chance of rain. Mostly cloudy, with a low around 37. North northeast wind 6 to 9 mph.

    Low: 37 °F

    Chance Rain

  • Saturday

    Saturday: Sunny, with a high near 53. North wind around 6 mph becoming light and variable in the afternoon.

    High: 53 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 34. Calm wind becoming west southwest around 5 mph after midnight.

    Low: 34 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 58. West southwest wind around 6 mph.

    High: 58 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 39.

    Low: 39 °F

    Mostly Cloudy

  • Monday

    Monday: A 50 percent chance of rain after noon. Mostly cloudy, with a high near 57.

    High: 57 °F

    Mostly Cloudy
    then Chance
    Rain

Detailed Forecast

This Afternoon
Patchy fog after 5pm. Otherwise, cloudy, with a high near 53. South southeast wind 5 to 7 mph.
Tonight
A 50 percent chance of rain, mainly after 2am. Patchy fog after 9pm. Otherwise, cloudy, with a low around 48. Southeast wind around 5 mph becoming calm in the evening.
Friday
Rain likely. Patchy fog before 10am. Otherwise, cloudy, with a high near 55. East northeast wind 5 to 11 mph, with gusts as high as 17 mph. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.
Friday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 37. North northeast wind 6 to 9 mph.
Saturday
Sunny, with a high near 53. North wind around 6 mph becoming light and variable in the afternoon.
Saturday Night
Mostly clear, with a low around 34. Calm wind becoming west southwest around 5 mph after midnight.
Sunday
Sunny, with a high near 58. West southwest wind around 6 mph.
Sunday Night
Mostly cloudy, with a low around 39.
Monday
A 50 percent chance of rain after noon. Mostly cloudy, with a high near 57.
Monday Night
Rain. Low around 46. Chance of precipitation is 80%.
Tuesday
A chance of rain. Mostly cloudy, with a high near 60.
Tuesday Night
Mostly cloudy, with a low around 33.
Wednesday
Mostly sunny, with a high near 45.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Sullivan IL
 39.61°N 88.61°W (Elev. 669 ft)
Last Update:
1:01 pm CST Nov 20, 2025
Forecast Valid:
1pm CST Nov 20, 2025-6pm CST Nov 26, 2025
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation