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.

Fair

45°F

7°C

Humidity 52%
Wind Speed W 6 mph
Barometer 29.97 in (1014.7 mb)
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Wind Chill42°F (6°C)
Last update 28 Feb 12:53 am CST
Extended Forecast for

Sullivan IL

  • Overnight

    Overnight: Mostly clear, with a low around 36. North wind 6 to 11 mph.

    Low: 36 °F

    Mostly Clear

  • Saturday

    Saturday: Partly sunny, with a high near 56. North northeast wind 6 to 11 mph becoming east in the afternoon.

    High: 56 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 26. North northeast wind 7 to 14 mph, with gusts as high as 21 mph.

    Low: 26 °F

    Decreasing
    Clouds

  • Sunday

    Sunday: Mostly cloudy, with a high near 39. North northeast wind 10 to 15 mph, with gusts as high as 22 mph.

    High: 39 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: Snow likely, mainly after midnight. Cloudy, with a low around 26. East northeast wind around 10 mph, with gusts as high as 17 mph. Chance of precipitation is 60%. New snow accumulation of 1 to 2 inches possible.

    Low: 26 °F

    Snow Likely

  • Monday

    Monday: Mostly cloudy, with a high near 40. East southeast wind 8 to 13 mph, with gusts as high as 20 mph.

    High: 40 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: Rain, mainly after midnight. Low around 34. Southeast wind 8 to 11 mph, with gusts as high as 18 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 34 °F

    Chance Rain
    then Rain

  • Tuesday

    Tuesday: Rain. High near 52. Chance of precipitation is 90%.

    High: 52 °F

    Rain

  • Tuesday Night

    Tuesday Night: Rain. Low around 42. Chance of precipitation is 80%.

    Low: 42 °F

    Rain

Detailed Forecast

Overnight
Mostly clear, with a low around 36. North wind 6 to 11 mph.
Saturday
Partly sunny, with a high near 56. North northeast wind 6 to 11 mph becoming east in the afternoon.
Saturday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 26. North northeast wind 7 to 14 mph, with gusts as high as 21 mph.
Sunday
Mostly cloudy, with a high near 39. North northeast wind 10 to 15 mph, with gusts as high as 22 mph.
Sunday Night
Snow likely, mainly after midnight. Cloudy, with a low around 26. East northeast wind around 10 mph, with gusts as high as 17 mph. Chance of precipitation is 60%. New snow accumulation of 1 to 2 inches possible.
Monday
Mostly cloudy, with a high near 40. East southeast wind 8 to 13 mph, with gusts as high as 20 mph.
Monday Night
Rain, mainly after midnight. Low around 34. Southeast wind 8 to 11 mph, with gusts as high as 18 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Tuesday
Rain. High near 52. Chance of precipitation is 90%.
Tuesday Night
Rain. Low around 42. Chance of precipitation is 80%.
Wednesday
Rain likely and possibly a thunderstorm. Cloudy, with a high near 59. Chance of precipitation is 70%.
Wednesday Night
Rain likely. Mostly cloudy, with a low around 47.
Thursday
A chance of rain. Mostly cloudy, with a high near 63.
Thursday Night
A chance of rain. Mostly cloudy, with a low around 51.
Friday
Rain likely. Cloudy, with a high near 67.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Sullivan IL
 39.59°N 88.61°W (Elev. 669 ft)
Last Update:
12:26 am CST Feb 28, 2026
Forecast Valid:
1am CST Feb 28, 2026-6pm CST Mar 6, 2026
 
Forecast Discussion
 
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Additional Resources

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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