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

40°F

4°C

Humidity 70%
Wind Speed N 14 mph
Barometer 30.33 in (1027.2 mb)
Dewpoint 31°F (-1°C)
Visibility 10.00 mi
Wind Chill32°F (0°C)
Last update 7 Apr 2:53 am CDT
Extended Forecast for

Sullivan IL

  • Overnight

    Overnight: Cloudy, with a low around 35. Northeast wind around 11 mph, with gusts as high as 21 mph.

    Low: 35 °F

    Cloudy

  • Tuesday

    Tuesday: A slight chance of rain and snow before 7am, then a slight chance of snow between 7am and 8am. Mostly cloudy, with a high near 48. East wind around 10 mph, with gusts as high as 18 mph. Chance of precipitation is 20%.

    High: 48 °F

    Slight Chance
    Rain/Snow
    then Mostly
    Cloudy

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 36. East wind 7 to 10 mph, with gusts as high as 17 mph.

    Low: 36 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 68. South southeast wind 10 to 17 mph, with gusts as high as 28 mph.

    High: 68 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 51. South wind around 14 mph, with gusts as high as 23 mph.

    Low: 51 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 73. South southwest wind around 14 mph, with gusts as high as 23 mph.

    High: 73 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 54. South wind 8 to 10 mph, with gusts as high as 20 mph.

    Low: 54 °F

    Mostly Cloudy

  • Friday

    Friday: A 50 percent chance of showers. Mostly cloudy, with a high near 67.

    High: 67 °F

    Chance
    Showers

  • Friday Night

    Friday Night: A 30 percent chance of showers. Mostly cloudy, with a low around 49.

    Low: 49 °F

    Chance
    Showers

Detailed Forecast

Overnight
Cloudy, with a low around 35. Northeast wind around 11 mph, with gusts as high as 21 mph.
Tuesday
A slight chance of rain and snow before 7am, then a slight chance of snow between 7am and 8am. Mostly cloudy, with a high near 48. East wind around 10 mph, with gusts as high as 18 mph. Chance of precipitation is 20%.
Tuesday Night
Partly cloudy, with a low around 36. East wind 7 to 10 mph, with gusts as high as 17 mph.
Wednesday
Partly sunny, with a high near 68. South southeast wind 10 to 17 mph, with gusts as high as 28 mph.
Wednesday Night
Partly cloudy, with a low around 51. South wind around 14 mph, with gusts as high as 23 mph.
Thursday
Mostly sunny, with a high near 73. South southwest wind around 14 mph, with gusts as high as 23 mph.
Thursday Night
Mostly cloudy, with a low around 54. South wind 8 to 10 mph, with gusts as high as 20 mph.
Friday
A 50 percent chance of showers. Mostly cloudy, with a high near 67.
Friday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 49.
Saturday
Partly sunny, with a high near 68.
Saturday Night
Mostly cloudy, with a low around 56.
Sunday
Partly sunny, with a high near 78.
Sunday Night
A chance of showers. Mostly cloudy, with a low around 62.
Monday
A chance of showers and thunderstorms. Partly sunny, with a high near 79. Breezy.
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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:
2:57 am CDT Apr 7, 2026
Forecast Valid:
3am CDT Apr 7, 2026-6pm CDT Apr 13, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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