National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Mattoon / Charleston, Coles County Memorial Airport (KMTO)

Lat: 39.48°NLon: 88.28°WElev: 722ft.

Fog/Mist

17°F

-8°C

Humidity 88%
Wind Speed N 3 mph
Barometer 30.28 in (1026.4 mb)
Dewpoint 14°F (-10°C)
Visibility 5.00 mi
Last update 4 Feb 2:53 am CST
Extended Forecast for

Sullivan IL

  • Overnight

    Overnight: Mostly cloudy, with a low around 11. Wind chill values between 2 and 7. North northeast wind around 6 mph.

    Low: 11 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 25. Wind chill values between 3 and 13. North northeast wind 6 to 8 mph.

    High: 25 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 10. North northwest wind around 5 mph becoming calm in the evening.

    Low: 10 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly cloudy, with a high near 30. Wind chill values between 3 and 13. Light southwest wind becoming south southwest 5 to 10 mph in the morning. Winds could gust as high as 17 mph.

    High: 30 °F

    Mostly Cloudy

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 23. South southwest wind 7 to 9 mph, with gusts as high as 17 mph.

    Low: 23 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 41. Northwest wind 10 to 14 mph, with gusts as high as 23 mph.

    High: 41 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 19. North wind 6 to 10 mph, with gusts as high as 17 mph.

    Low: 19 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 32.

    High: 32 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 23.

    Low: 23 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 11. Wind chill values between 2 and 7. North northeast wind around 6 mph.
Wednesday
Partly sunny, with a high near 25. Wind chill values between 3 and 13. North northeast wind 6 to 8 mph.
Wednesday Night
Partly cloudy, with a low around 10. North northwest wind around 5 mph becoming calm in the evening.
Thursday
Mostly cloudy, with a high near 30. Wind chill values between 3 and 13. Light southwest wind becoming south southwest 5 to 10 mph in the morning. Winds could gust as high as 17 mph.
Thursday Night
Partly cloudy, with a low around 23. South southwest wind 7 to 9 mph, with gusts as high as 17 mph.
Friday
Mostly sunny, with a high near 41. Northwest wind 10 to 14 mph, with gusts as high as 23 mph.
Friday Night
Partly cloudy, with a low around 19. North wind 6 to 10 mph, with gusts as high as 17 mph.
Saturday
Mostly sunny, with a high near 32.
Saturday Night
Mostly cloudy, with a low around 23.
Sunday
Partly sunny, with a high near 39.
Sunday Night
Partly cloudy, with a low around 21.
Monday
Mostly sunny, with a high near 42.
Monday Night
Mostly cloudy, with a low around 30.
Tuesday
Partly sunny, with a high near 50.
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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:
2:37 am CST Feb 4, 2026
Forecast Valid:
3am CST Feb 4, 2026-6pm CST Feb 10, 2026
 
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Additional Resources

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