Current conditions at

Mattoon / Charleston, Coles County Memorial Airport (KMTO)

Lat: 39.48°NLon: 88.28°WElev: 722ft.

Mostly Cloudy

35°F

2°C

Humidity 76%
Wind Speed Calm
Barometer 30.29 in (1026.4 mb)
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Last update 12 Feb 8:53 am CST
Extended Forecast for

Sullivan IL

  • Today

    Today: Mostly cloudy, with a high near 48. Southwest wind 5 to 7 mph becoming calm  in the afternoon.

    High: 48 °F

    Mostly Cloudy

  • Tonight

    Tonight: Mostly cloudy, with a low around 29. Southeast wind 3 to 6 mph.

    Low: 29 °F

    Mostly Cloudy

  • Friday

    Friday: Sunny, with a high near 52. South wind 6 to 10 mph, with gusts as high as 16 mph.

    High: 52 °F

    Sunny

  • Friday Night

    Friday Night: Increasing clouds, with a low around 31. South wind 3 to 5 mph.

    Low: 31 °F

    Increasing
    Clouds

  • Saturday

    Saturday: A 30 percent chance of rain after noon.  Cloudy, with a high near 50. South southeast wind 3 to 7 mph.

    High: 50 °F

    Mostly Cloudy
    then Chance
    Rain

  • Saturday Night

    Saturday Night: Rain likely, mainly before midnight.  Cloudy, with a low around 38. East southeast wind around 7 mph becoming northeast after midnight.  Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 38 °F

    Rain Likely

  • Sunday

    Sunday: Mostly sunny, with a high near 55. North northeast wind 6 to 9 mph.

    High: 55 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 31.

    Low: 31 °F

    Mostly Clear

  • Washington's Birthday

    Washington's Birthday: Mostly sunny, with a high near 56.

    High: 56 °F

    Mostly Sunny

Detailed Forecast

Today
Mostly cloudy, with a high near 48. Southwest wind 5 to 7 mph becoming calm in the afternoon.
Tonight
Mostly cloudy, with a low around 29. Southeast wind 3 to 6 mph.
Friday
Sunny, with a high near 52. South wind 6 to 10 mph, with gusts as high as 16 mph.
Friday Night
Increasing clouds, with a low around 31. South wind 3 to 5 mph.
Saturday
A 30 percent chance of rain after noon. Cloudy, with a high near 50. South southeast wind 3 to 7 mph.
Saturday Night
Rain likely, mainly before midnight. Cloudy, with a low around 38. East southeast wind around 7 mph becoming northeast after midnight. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.
Sunday
Mostly sunny, with a high near 55. North northeast wind 6 to 9 mph.
Sunday Night
Mostly clear, with a low around 31.
Washington's Birthday
Mostly sunny, with a high near 56.
Monday Night
Mostly cloudy, with a low around 40.
Tuesday
Cloudy, with a high near 59.
Tuesday Night
Mostly cloudy, with a low around 50.
Wednesday
Partly sunny, with a high near 62.
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ABOUT THIS FORECAST

 
Point Forecast:
Sullivan IL
 39.59°N 88.61°W (Elev. 669 ft)
9:22 am CST Feb 12, 2026
9am CST Feb 12, 2026-6pm CST Feb 18, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

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