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Hazardous Weather Conditions

Current conditions at

Mattoon / Charleston, Coles County Memorial Airport (KMTO)

Lat: 39.48°NLon: 88.28°WElev: 722ft.

Partly Cloudy

62°F

17°C

Humidity 78%
Wind Speed SE 3 mph
Barometer 29.94 in (1013.4 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 21 Jun 5:53 am CDT
Extended Forecast for

Sullivan IL

Flood Watch June 21, 07:00am until June 22, 01:00am
Click here for hazard details and duration
Flood Watch

  • Today

    Today: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 2pm. Some of the storms could produce heavy rainfall. High near 76. Southeast wind 5 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 90%. New rainfall amounts between three quarters and one inch possible.

    High: 76 °F

    Slight Chance
    Showers then
    Heavy Rain

  • Tonight

    Tonight: Showers and thunderstorms before 1am, then a chance of showers. Some of the storms could produce heavy rainfall. Low around 60. South southwest wind 10 to 13 mph becoming northwest after midnight. Winds could gust as high as 23 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 60 °F

    Heavy Rain
    then Chance
    Showers

  • Monday

    Monday: A 20 percent chance of showers before 8am. Mostly cloudy, with a high near 73. North wind around 13 mph, with gusts as high as 21 mph.

    High: 73 °F

    Slight Chance
    Showers then
    Partly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 54. North northeast wind 5 to 9 mph.

    Low: 54 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 77. North northeast wind 3 to 5 mph.

    High: 77 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 57. Light and variable wind.

    Low: 57 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 79. Light and variable wind becoming southwest around 6 mph in the morning.

    High: 79 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 60.

    Low: 60 °F

    Partly Cloudy

  • Thursday

    Thursday: A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 79.

    High: 79 °F

    Mostly Sunny
    then Chance
    T-storms

Detailed Forecast

Today
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 2pm. Some of the storms could produce heavy rainfall. High near 76. Southeast wind 5 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 90%. New rainfall amounts between three quarters and one inch possible.
Tonight
Showers and thunderstorms before 1am, then a chance of showers. Some of the storms could produce heavy rainfall. Low around 60. South southwest wind 10 to 13 mph becoming northwest after midnight. Winds could gust as high as 23 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Monday
A 20 percent chance of showers before 8am. Mostly cloudy, with a high near 73. North wind around 13 mph, with gusts as high as 21 mph.
Monday Night
Mostly clear, with a low around 54. North northeast wind 5 to 9 mph.
Tuesday
Sunny, with a high near 77. North northeast wind 3 to 5 mph.
Tuesday Night
Mostly clear, with a low around 57. Light and variable wind.
Wednesday
Mostly sunny, with a high near 79. Light and variable wind becoming southwest around 6 mph in the morning.
Wednesday Night
Partly cloudy, with a low around 60.
Thursday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 79.
Thursday Night
Mostly clear, with a low around 59.
Friday
Mostly sunny, with a high near 80.
Friday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 62.
Saturday
A chance of showers and thunderstorms. Partly sunny, with a high near 83.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Sullivan IL
 39.61°N 88.61°W (Elev. 669 ft)
Last Update:
3:56 am CDT Jun 21, 2026
Forecast Valid:
6am CDT Jun 21, 2026-6pm CDT Jun 27, 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