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.

Fair

54°F

12°C

Humidity 55%
Wind Speed NW 14 G 22 mph
Barometer 30.28 in (1025.7 mb)
Dewpoint 38°F (3°C)
Visibility 10.00 mi
Wind Chill50°F (10°C)
Last update 6 Apr 11:53 am CDT
Extended Forecast for

Sullivan IL

  • This Afternoon

    This Afternoon: Sunny, with a high near 57. Northwest wind around 15 mph, with gusts as high as 23 mph.

    High: 57 °F

    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 33. North northeast wind 8 to 10 mph, with gusts as high as 16 mph.

    Low: 33 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: A 20 percent chance of snow before 10am. Mostly cloudy, with a high near 47. East northeast wind 8 to 10 mph, with gusts as high as 16 mph.

    High: 47 °F

    Slight Chance
    Snow then
    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 35. East wind 7 to 10 mph, with gusts as high as 18 mph.

    Low: 35 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 68. Southeast wind 10 to 16 mph, with gusts as high as 26 mph.

    High: 68 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 50. South wind around 14 mph, with gusts as high as 23 mph.

    Low: 50 °F

    Partly Cloudy

  • Thursday

    Thursday: A 30 percent chance of showers after 1pm. Mostly sunny, with a high near 67. South wind 14 to 17 mph, with gusts as high as 28 mph.

    High: 67 °F

    Mostly Sunny
    then Chance
    Showers

  • Thursday Night

    Thursday Night: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 53.

    Low: 53 °F

    Chance
    T-storms

  • Friday

    Friday: A 50 percent chance of showers. Mostly cloudy, with a high near 68.

    High: 68 °F

    Chance
    Showers

Detailed Forecast

This Afternoon
Sunny, with a high near 57. Northwest wind around 15 mph, with gusts as high as 23 mph.
Tonight
Increasing clouds, with a low around 33. North northeast wind 8 to 10 mph, with gusts as high as 16 mph.
Tuesday
A 20 percent chance of snow before 10am. Mostly cloudy, with a high near 47. East northeast wind 8 to 10 mph, with gusts as high as 16 mph.
Tuesday Night
Mostly cloudy, with a low around 35. East wind 7 to 10 mph, with gusts as high as 18 mph.
Wednesday
Partly sunny, with a high near 68. Southeast wind 10 to 16 mph, with gusts as high as 26 mph.
Wednesday Night
Partly cloudy, with a low around 50. South wind around 14 mph, with gusts as high as 23 mph.
Thursday
A 30 percent chance of showers after 1pm. Mostly sunny, with a high near 67. South wind 14 to 17 mph, with gusts as high as 28 mph.
Thursday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 53.
Friday
A 50 percent chance of showers. Mostly cloudy, with a high near 68.
Friday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 50.
Saturday
A chance of showers. Partly sunny, with a high near 73.
Saturday Night
Mostly cloudy, with a low around 58.
Sunday
A chance of showers. Mostly cloudy, with a high near 78.
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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:
11:31 am CDT Apr 6, 2026
Forecast Valid:
12pm CDT Apr 6, 2026-6pm CDT Apr 12, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation