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.

Partly Cloudy

52°F

11°C

Humidity 75%
Wind Speed NW 6 mph
Barometer 29.92 in (1013.4 mb)
Dewpoint 44°F (7°C)
Visibility 10.00 mi
Wind Chill50°F (10°C)
Last update 15 Feb 2:53 pm CST
Extended Forecast for

Sullivan IL

  • This Afternoon

    This Afternoon: Sunny, with a high near 57. West northwest wind 6 to 8 mph.

    High: 57 °F

    Sunny

  • Tonight

    Tonight: Patchy fog after 2am. Otherwise, partly cloudy, with a low around 38. West northwest wind 5 to 7 mph becoming southwest after midnight.

    Low: 38 °F

    Mostly Clear
    then Patchy
    Fog

  • Washington's Birthday

    Washington's Birthday: Patchy fog before 10am. Otherwise, cloudy, then gradual clearing during the afternoon, with a high near 59. South southwest wind 7 to 14 mph, with gusts as high as 22 mph.

    High: 59 °F

    Patchy Fog
    then Partly
    Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 40. South wind around 9 mph, with gusts as high as 15 mph.

    Low: 40 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Cloudy, with a high near 59. South wind 9 to 18 mph, with gusts as high as 29 mph.

    High: 59 °F

    Cloudy

  • Tuesday Night

    Tuesday Night: A 30 percent chance of rain after midnight. Mostly cloudy, with a low around 54. Breezy, with a south wind 17 to 22 mph, with gusts as high as 34 mph.

    Low: 54 °F

    Breezy.
    Cloudy then
    Chance Rain

  • Wednesday

    Wednesday: Sunny, with a high near 67. Breezy, with a west southwest wind 13 to 21 mph, with gusts as high as 32 mph.

    High: 67 °F

    Sunny and
    Breezy

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 43.

    Low: 43 °F

    Partly Cloudy

  • Thursday

    Thursday: A 30 percent chance of rain after noon. Mostly sunny, with a high near 67.

    High: 67 °F

    Partly Sunny
    then Chance
    Rain

Detailed Forecast

This Afternoon
Sunny, with a high near 57. West northwest wind 6 to 8 mph.
Tonight
Patchy fog after 2am. Otherwise, partly cloudy, with a low around 38. West northwest wind 5 to 7 mph becoming southwest after midnight.
Washington's Birthday
Patchy fog before 10am. Otherwise, cloudy, then gradual clearing during the afternoon, with a high near 59. South southwest wind 7 to 14 mph, with gusts as high as 22 mph.
Monday Night
Mostly cloudy, with a low around 40. South wind around 9 mph, with gusts as high as 15 mph.
Tuesday
Cloudy, with a high near 59. South wind 9 to 18 mph, with gusts as high as 29 mph.
Tuesday Night
A 30 percent chance of rain after midnight. Mostly cloudy, with a low around 54. Breezy, with a south wind 17 to 22 mph, with gusts as high as 34 mph.
Wednesday
Sunny, with a high near 67. Breezy, with a west southwest wind 13 to 21 mph, with gusts as high as 32 mph.
Wednesday Night
Partly cloudy, with a low around 43.
Thursday
A 30 percent chance of rain after noon. Mostly sunny, with a high near 67.
Thursday Night
A 30 percent chance of rain before midnight. Partly cloudy, with a low around 37.
Friday
Mostly sunny, with a high near 50.
Friday Night
A chance of rain. Partly cloudy, with a low around 28.
Saturday
Mostly sunny, with a high near 44.
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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:
3:16 pm CST Feb 15, 2026
Forecast Valid:
3pm CST Feb 15, 2026-6pm CST Feb 21, 2026
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation