Current conditions at

Mattoon / Charleston, Coles County Memorial Airport (KMTO)

Lat: 39.48°NLon: 88.28°WElev: 722ft.

Fair

44°F

7°C

Humidity 68%
Wind Speed SW 9 mph
Barometer 30.22 in (1023.6 mb)
Dewpoint 34°F (1°C)
Visibility 10.00 mi
Wind Chill39°F (4°C)
Last update 6 Apr 2:53 am CDT
Extended Forecast for

Sullivan IL

  • Overnight

    Overnight: Clear, with a low around 39. West southwest wind around 8 mph, with gusts as high as 18 mph.

    Low: 39 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 57. Northwest wind 10 to 15 mph, with gusts as high as 24 mph.

    High: 57 °F

    Sunny

  • Monday Night

    Monday Night: 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: Mostly cloudy, with a high near 47. East northeast wind 8 to 10 mph, with gusts as high as 16 mph.

    High: 47 °F

    Mostly Cloudy

  • 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.

    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

Detailed Forecast

Overnight
Clear, with a low around 39. West southwest wind around 8 mph, with gusts as high as 18 mph.
Monday
Sunny, with a high near 57. Northwest wind 10 to 15 mph, with gusts as high as 24 mph.
Monday Night
Increasing clouds, with a low around 33. North northeast wind 8 to 10 mph, with gusts as high as 16 mph.
Tuesday
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.
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 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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ABOUT THIS FORECAST

 
Point Forecast:
Sullivan IL
 39.59°N 88.61°W (Elev. 669 ft)
1:26 am CDT Apr 6, 2026
3am CDT Apr 6, 2026-6pm CDT Apr 12, 2026
 
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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