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.

Overcast

75°F

24°C

Humidity 64%
Wind Speed S 14 G 23 mph
Barometer 30.03 in (1016.4 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Last update 13 Apr 10:53 am CDT
Extended Forecast for

Sullivan IL

  • Today

    Today: A slight chance of showers and thunderstorms before 4pm, then a slight chance of showers and thunderstorms after 5pm. Partly sunny, with a high near 81. South southwest wind 15 to 17 mph, with gusts as high as 28 mph. Chance of precipitation is 20%.

    High: 81 °F

    Slight Chance
    T-storms

  • Tonight

    Tonight: A 10 percent chance of showers and thunderstorms before 7pm. Mostly cloudy, with a low around 65. South wind 15 to 17 mph, with gusts as high as 29 mph.

    Low: 65 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Tuesday

    Tuesday: A 30 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 83. South southwest wind 14 to 18 mph, with gusts as high as 30 mph.

    High: 83 °F

    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Showers likely and possibly a thunderstorm before 1am, then a chance of showers. Mostly cloudy, with a low around 67. South southwest wind 13 to 16 mph, with gusts as high as 24 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 67 °F

    Showers
    Likely

  • Wednesday

    Wednesday: Showers likely, then showers and possibly a thunderstorm after 10am. High near 78. South southwest wind 11 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    High: 78 °F

    Showers

  • Wednesday Night

    Wednesday Night: Showers likely and possibly a thunderstorm, then showers after 1am. Low around 61. South southwest wind 11 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 61 °F

    Showers

  • Thursday

    Thursday: A chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 79. South southwest wind 11 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 50%.

    High: 79 °F

    Chance
    Showers then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 57.

    Low: 57 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 83.

    High: 83 °F

    Mostly Sunny

Detailed Forecast

Today
A slight chance of showers and thunderstorms before 4pm, then a slight chance of showers and thunderstorms after 5pm. Partly sunny, with a high near 81. South southwest wind 15 to 17 mph, with gusts as high as 28 mph. Chance of precipitation is 20%.
Tonight
A 10 percent chance of showers and thunderstorms before 7pm. Mostly cloudy, with a low around 65. South wind 15 to 17 mph, with gusts as high as 29 mph.
Tuesday
A 30 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 83. South southwest wind 14 to 18 mph, with gusts as high as 30 mph.
Tuesday Night
Showers likely and possibly a thunderstorm before 1am, then a chance of showers. Mostly cloudy, with a low around 67. South southwest wind 13 to 16 mph, with gusts as high as 24 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday
Showers likely, then showers and possibly a thunderstorm after 10am. High near 78. South southwest wind 11 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday Night
Showers likely and possibly a thunderstorm, then showers after 1am. Low around 61. South southwest wind 11 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Thursday
A chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 79. South southwest wind 11 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 50%.
Thursday Night
Mostly clear, with a low around 57.
Friday
Mostly sunny, with a high near 83.
Friday Night
A chance of showers, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 60. Chance of precipitation is 70%.
Saturday
Showers and thunderstorms likely. Mostly cloudy, with a high near 72.
Saturday Night
A chance of showers. Mostly cloudy, with a low around 41.
Sunday
Mostly sunny, with a high near 60.
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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:
10:31 am CDT Apr 13, 2026
Forecast Valid:
11am CDT Apr 13, 2026-6pm CDT Apr 19, 2026
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation