Hazardous Weather Conditions

Current conditions at

Mattoon / Charleston, Coles County Memorial Airport (KMTO)

Lat: 39.48°NLon: 88.28°WElev: 722ft.

A Few Clouds

21°C

70°F

Humidity 97%
Wind Speed Calm
Barometer 1016.9 mb (30.05 in)
Dewpoint 21°C (69°F)
Visibility 16 km
Last update 13 Jul 10:53 pm CDT
Extended Forecast for

Sullivan IL

  • Tonight

    Tonight: Patchy dense fog.  Otherwise, mostly cloudy, with a low around 20. Calm wind.

    Low: 20 °C

    Patchy Dense
    Fog

  • Monday

    Monday: Areas of dense fog before 8am.  Otherwise, mostly sunny, with a high near 29. Calm wind.

    High: 29 °C

    Areas Dense
    Fog then
    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 21. Calm wind.

    Low: 21 °C

    Partly Cloudy

  • Tuesday

    Tuesday: A 50 percent chance of showers and thunderstorms after 1pm.  Partly sunny, with a high near 31. Calm wind becoming south 5 to 10 km/h in the morning.

    High: 31 °C

    Partly Sunny
    then Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 22. Calm wind.

    Low: 22 °C

    Mostly Cloudy

  • Wednesday

    Wednesday: A 50 percent chance of showers and thunderstorms.  Mostly sunny, with a high near 31. South southwest wind 8 to 11 km/h.

    High: 31 °C

    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers and thunderstorms before 1am.  Partly cloudy, with a low around 22. South southwest wind around 10 km/h.

    Low: 22 °C

    Chance
    T-storms

  • Thursday

    Thursday: A 50 percent chance of showers and thunderstorms after 1pm.  Mostly sunny, with a high near 31.

    High: 31 °C

    Mostly Sunny
    then Chance
    T-storms

  • Thursday Night

    Thursday Night: A 40 percent chance of showers and thunderstorms before 1am.  Mostly cloudy, with a low around 21.

    Low: 21 °C

    Chance
    T-storms

Detailed Forecast

Tonight
Patchy dense fog. Otherwise, mostly cloudy, with a low around 20. Calm wind.
Monday
Areas of dense fog before 8am. Otherwise, mostly sunny, with a high near 29. Calm wind.
Monday Night
Partly cloudy, with a low around 21. Calm wind.
Tuesday
A 50 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 31. Calm wind becoming south 5 to 10 km/h in the morning.
Tuesday Night
Mostly cloudy, with a low around 22. Calm wind.
Wednesday
A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 31. South southwest wind 8 to 11 km/h.
Wednesday Night
A 30 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 22. South southwest wind around 10 km/h.
Thursday
A 50 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 31.
Thursday Night
A 40 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 21.
Friday
A 40 percent chance of showers after 1pm. Partly sunny, with a high near 29.
Friday Night
Mostly cloudy, with a low around 20.
Saturday
A chance of showers and thunderstorms. Mostly sunny, with a high near 30.
Saturday Night
Partly cloudy, with a low around 21.
Sunday
Mostly sunny, with a high near 30.
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ABOUT THIS FORECAST

 
Point Forecast:
Sullivan IL
 39.59°N 88.61°W (Elev. 669 m)
10:41 pm CDT Jul 13, 2025
11pm CDT Jul 13, 2025-6pm CDT Jul 20, 2025
 
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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