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

37°F

3°C

Humidity 57%
Wind Speed NE 13 mph
Barometer 30.36 in (1028.9 mb)
Dewpoint 23°F (-5°C)
Visibility 10.00 mi
Wind Chill29°F (-2°C)
Last update 1 Mar 6:53 pm CST
Extended Forecast for

Sullivan IL

  • Tonight

    Tonight: Snow, mainly before 4am. Low around 30. East wind around 10 mph, with gusts as high as 17 mph. Chance of precipitation is 80%. Total nighttime snow accumulation of less than one inch possible.

    Low: 30 °F

    Chance Snow
    then Snow

  • Monday

    Monday: A 20 percent chance of snow before 9am. Mostly cloudy, with a high near 43. East wind 7 to 11 mph, with gusts as high as 18 mph.

    High: 43 °F

    Slight Chance
    Snow then
    Mostly Cloudy

  • Monday Night

    Monday Night: Showers likely after midnight. Cloudy, with a low around 36. East southeast wind around 6 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 36 °F

    Cloudy then
    Showers
    Likely

  • Tuesday

    Tuesday: Showers. High near 56. South wind 6 to 10 mph, with gusts as high as 18 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    High: 56 °F

    Showers

  • Tuesday Night

    Tuesday Night: Showers. Low around 50. Southeast wind 6 to 9 mph, with gusts as high as 15 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 50 °F

    Showers

  • Wednesday

    Wednesday: Showers, with thunderstorms also possible after noon. High near 63. South southwest wind 8 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 63 °F

    Showers

  • Wednesday Night

    Wednesday Night: Showers and possibly a thunderstorm before midnight, then showers likely. Low around 51. Southwest wind 8 to 10 mph, with gusts as high as 16 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 51 °F

    Showers

  • Thursday

    Thursday: Showers likely. Mostly cloudy, with a high near 66. Chance of precipitation is 70%.

    High: 66 °F

    Showers
    Likely

  • Thursday Night

    Thursday Night: A chance of showers, then showers likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 55. Chance of precipitation is 60%.

    Low: 55 °F

    Showers
    Likely

Detailed Forecast

Tonight
Snow, mainly before 4am. Low around 30. East wind around 10 mph, with gusts as high as 17 mph. Chance of precipitation is 80%. Total nighttime snow accumulation of less than one inch possible.
Monday
A 20 percent chance of snow before 9am. Mostly cloudy, with a high near 43. East wind 7 to 11 mph, with gusts as high as 18 mph.
Monday Night
Showers likely after midnight. Cloudy, with a low around 36. East southeast wind around 6 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Tuesday
Showers. High near 56. South wind 6 to 10 mph, with gusts as high as 18 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Tuesday Night
Showers. Low around 50. Southeast wind 6 to 9 mph, with gusts as high as 15 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Wednesday
Showers, with thunderstorms also possible after noon. High near 63. South southwest wind 8 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
Wednesday Night
Showers and possibly a thunderstorm before midnight, then showers likely. Low around 51. Southwest wind 8 to 10 mph, with gusts as high as 16 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Thursday
Showers likely. Mostly cloudy, with a high near 66. Chance of precipitation is 70%.
Thursday Night
A chance of showers, then showers likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 55. Chance of precipitation is 60%.
Friday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 73. Chance of precipitation is 70%.
Friday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 47.
Saturday
Showers likely. Cloudy, with a high near 60.
Saturday Night
A chance of showers. Partly cloudy, with a low around 39.
Sunday
A chance of showers. Sunny, with a high near 64.
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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:
6:36 pm CST Mar 1, 2026
Forecast Valid:
7pm CST Mar 1, 2026-6pm CDT Mar 8, 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