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

67°F

19°C

Humidity 100%
Wind Speed N 5 mph
Barometer 30.04 in (1016.7 mb)
Dewpoint 67°F (19°C)
Visibility 4.00 mi
Last update 14 Jul 12:53 am CDT
Extended Forecast for

5 Miles S Sullivan IL

Dense Fog Advisory until July 14, 10:00am
Click here for hazard details and duration
Dense Fog Advisory
  •  
    Dense Fog Advisory until July 14, 10:00am

    NOW until 10:00am Mon

    Dense Fog Advisory

  • Overnight

    Low: 69 °F

    Areas Dense
    Fog

  • Monday

    Monday: Areas of dense fog before 8am. Otherwise, mostly sunny, with a high near 86. Light and variable wind.

    High: 86 °F

    Areas Dense
    Fog then
    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 70. Calm wind.

    Low: 70 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A 50 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 87. Calm wind becoming south around 5 mph in the afternoon.

    High: 87 °F

    Partly Sunny
    then Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 72. Calm wind.

    Low: 72 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 88. South southwest wind 5 to 7 mph.

    High: 88 °F

    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 73. South southwest wind around 6 mph.

    Low: 73 °F

    Chance
    T-storms

  • Thursday

    Thursday: A 50 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 89.

    High: 89 °F

    Mostly Sunny
    then Chance
    T-storms

Detailed Forecast

Overnight
Areas of dense fog. Otherwise, mostly cloudy, with a low around 69. Calm wind.
Monday
Areas of dense fog before 8am. Otherwise, mostly sunny, with a high near 86. Light and variable wind.
Monday Night
Partly cloudy, with a low around 70. Calm wind.
Tuesday
A 50 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 87. Calm wind becoming south around 5 mph in the afternoon.
Tuesday Night
A 30 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 72. Calm wind.
Wednesday
A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 88. South southwest wind 5 to 7 mph.
Wednesday Night
A 30 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 73. South southwest wind around 6 mph.
Thursday
A 50 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 89.
Thursday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 72. Chance of precipitation is 40%.
Friday
A 40 percent chance of showers after 1pm. Partly sunny, with a high near 85.
Friday Night
Partly cloudy, with a low around 70.
Saturday
A chance of showers and thunderstorms. Partly sunny, with a high near 86.
Saturday Night
Partly cloudy, with a low around 70.
Sunday
Mostly sunny, with a high near 87.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles S Sullivan IL
 39.52°N 88.59°W (Elev. 617 ft)
Last Update:
12:26 am CDT Jul 14, 2025
Forecast Valid:
1am CDT Jul 14, 2025-6pm CDT Jul 20, 2025
 
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