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.

Partly Cloudy

75°F

24°C

Humidity 71%
Wind Speed S 14 G 30 mph
Barometer 29.96 in (1013.8 mb)
Dewpoint 65°F (18°C)
Visibility 10.00 mi
Last update 18 May 8:53 am CDT
Extended Forecast for

5 Miles SE Sullivan IL

  • Today

    Today: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 11am. High near 81. Breezy, with a south southwest wind 15 to 20 mph, with gusts as high as 31 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 81 °F

    Breezy.
    Showers then
    T-storms

  • Tonight

    Tonight: A 40 percent chance of showers and thunderstorms, mainly before 9pm. Cloudy, then gradually becoming partly cloudy, with a low around 68. South wind 13 to 16 mph, with gusts as high as 29 mph.

    Low: 68 °F

    Chance
    T-storms then
    Partly Cloudy

  • Tuesday

    Tuesday: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1pm. High near 81. South southwest wind 14 to 18 mph, with gusts as high as 30 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    High: 81 °F

    Chance
    T-storms then
    T-storms

  • Tuesday Night

    Tuesday Night: Showers and possibly a thunderstorm. Low around 55. North wind 8 to 10 mph, with gusts as high as 17 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 55 °F

    Showers

  • Wednesday

    Wednesday: Partly sunny, with a high near 67. North northeast wind around 11 mph, with gusts as high as 20 mph.

    High: 67 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 45. Northeast wind 9 to 11 mph, with gusts as high as 18 mph.

    Low: 45 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 70. East wind around 11 mph, with gusts as high as 18 mph.

    High: 70 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 52.

    Low: 52 °F

    Mostly Cloudy

  • Friday

    Friday: A 50 percent chance of showers. Mostly cloudy, with a high near 72.

    High: 72 °F

    Chance
    Showers

Detailed Forecast

Today
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 11am. High near 81. Breezy, with a south southwest wind 15 to 20 mph, with gusts as high as 31 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
Tonight
A 40 percent chance of showers and thunderstorms, mainly before 9pm. Cloudy, then gradually becoming partly cloudy, with a low around 68. South wind 13 to 16 mph, with gusts as high as 29 mph.
Tuesday
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1pm. High near 81. South southwest wind 14 to 18 mph, with gusts as high as 30 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Tuesday Night
Showers and possibly a thunderstorm. Low around 55. North wind 8 to 10 mph, with gusts as high as 17 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday
Partly sunny, with a high near 67. North northeast wind around 11 mph, with gusts as high as 20 mph.
Wednesday Night
Mostly cloudy, with a low around 45. Northeast wind 9 to 11 mph, with gusts as high as 18 mph.
Thursday
Mostly sunny, with a high near 70. East wind around 11 mph, with gusts as high as 18 mph.
Thursday Night
Mostly cloudy, with a low around 52.
Friday
A 50 percent chance of showers. Mostly cloudy, with a high near 72.
Friday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 57.
Saturday
Partly sunny, with a high near 78.
Saturday Night
Partly cloudy, with a low around 59.
Sunday
Mostly sunny, with a high near 82.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles SE Sullivan IL
 39.56°N 88.53°W (Elev. 650 ft)
Last Update:
9:37 am CDT May 18, 2026
Forecast Valid:
9am CDT May 18, 2026-6pm CDT May 24, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation