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

63°F

17°C

Humidity 76%
Wind Speed Calm
Barometer 30.07 in (1018.0 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 24 May 10:53 pm CDT
Extended Forecast for

2 Miles SW Sullivan IL

  • Tonight

    Tonight: Patchy fog after 3am. Otherwise, mostly clear, with a low around 55. Light east wind.

    Low: 55 °F

    Patchy Fog

  • Memorial Day

    Memorial Day: Patchy fog before 10am. Otherwise, sunny, with a high near 79. East wind 3 to 8 mph.

    High: 79 °F

    Patchy Fog
    then Mostly
    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 56. East wind 3 to 5 mph.

    Low: 56 °F

    Mostly Clear

  • Tuesday

    Tuesday: Partly sunny, with a high near 80. East southeast wind 3 to 7 mph.

    High: 80 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms between 1am and 4am, then a chance of showers after 4am. Mostly cloudy, with a low around 63. East southeast wind 3 to 6 mph. Chance of precipitation is 50%.

    Low: 63 °F

    Mostly Cloudy
    then Chance
    T-storms

  • Wednesday

    Wednesday: A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 80. East wind around 6 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 80 °F

    Showers
    Likely

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 63. East wind 3 to 5 mph.

    Low: 63 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 82.

    High: 82 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 63.

    Low: 63 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Patchy fog after 3am. Otherwise, mostly clear, with a low around 55. Light east wind.
Memorial Day
Patchy fog before 10am. Otherwise, sunny, with a high near 79. East wind 3 to 8 mph.
Monday Night
Mostly clear, with a low around 56. East wind 3 to 5 mph.
Tuesday
Partly sunny, with a high near 80. East southeast wind 3 to 7 mph.
Tuesday Night
A chance of showers and thunderstorms between 1am and 4am, then a chance of showers after 4am. Mostly cloudy, with a low around 63. East southeast wind 3 to 6 mph. Chance of precipitation is 50%.
Wednesday
A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 80. East wind around 6 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
Partly cloudy, with a low around 63. East wind 3 to 5 mph.
Thursday
Mostly sunny, with a high near 82.
Thursday Night
Mostly cloudy, with a low around 63.
Friday
A 30 percent chance of showers after 1pm. Partly sunny, with a high near 78.
Friday Night
A chance of showers. Mostly cloudy, with a low around 61.
Saturday
A chance of showers. Partly sunny, with a high near 75.
Saturday Night
Partly cloudy, with a low around 58.
Sunday
Mostly sunny, with a high near 75.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SW Sullivan IL
 39.59°N 88.64°W (Elev. 673 ft)
Last Update:
7:51 pm CDT May 24, 2026
Forecast Valid:
11pm CDT May 24, 2026-6pm CDT May 31, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation