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

79°F

26°C

Humidity 85%
Wind Speed S 12 G 20 mph
Barometer 29.97 in (1014.2 mb)
Dewpoint 74°F (23°C)
Visibility 10.00 mi
Heat Index83°F (28°C)
Last update 9 Aug 11:53 pm CDT
Extended Forecast for

3 Miles N Greenup IL

Heat Advisory August 10, 12:00pm until August 10, 07:00pm
Click here for hazard details and duration
Heat Advisory

  • Overnight

    Overnight: A 20 percent chance of showers and thunderstorms after 3am. Partly cloudy, with a low around 73. South southwest wind around 9 mph, with gusts as high as 20 mph.

    Low: 73 °F

    Slight Chance
    T-storms

  • Monday

    Monday: A 10 percent chance of showers and thunderstorms before 7am. Mostly sunny, with a high near 91. Heat index values as high as 104. South southwest wind 8 to 10 mph, with gusts as high as 17 mph.

    High: 91 °F

    Slight Chance
    T-storms then
    Partly Sunny

  • Monday Night

    Monday Night: A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 75. South wind 3 to 8 mph. Winds could gust as high as 15 mph.

    Low: 75 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

  • Tuesday

    Tuesday: A chance of showers and thunderstorms before 11am, then a chance of showers between 11am and 1pm. Mostly sunny, with a high near 90. Heat index values as high as 101. Southwest wind around 9 mph, with gusts as high as 16 mph. Chance of precipitation is 40%.

    High: 90 °F

    Chance
    T-storms then
    Chance
    Showers

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms between 1am and 4am, then a chance of showers after 4am. Partly cloudy, with a low around 73. Southwest wind 6 to 8 mph, with gusts as high as 16 mph. Chance of precipitation is 40%.

    Low: 73 °F

    Mostly Clear
    then Chance
    T-storms

  • Wednesday

    Wednesday: A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 88. West southwest wind 7 to 10 mph, with gusts as high as 17 mph. Chance of precipitation is 40%.

    High: 88 °F

    Chance
    Showers then
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Showers likely and possibly a thunderstorm. Partly cloudy, with a low around 70. West southwest wind around 5 mph becoming light and variable in the evening. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 70 °F

    Showers
    Likely

  • Thursday

    Thursday: A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 84. Chance of precipitation is 50%.

    High: 84 °F

    Chance
    Showers then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms, then showers likely after 1am. Mostly cloudy, with a low around 66. Chance of precipitation is 70%.

    Low: 66 °F

    Chance
    T-storms then
    Showers
    Likely

Detailed Forecast

Overnight
A 20 percent chance of showers and thunderstorms after 3am. Partly cloudy, with a low around 73. South southwest wind around 9 mph, with gusts as high as 20 mph.
Monday
A 10 percent chance of showers and thunderstorms before 7am. Mostly sunny, with a high near 91. Heat index values as high as 104. South southwest wind 8 to 10 mph, with gusts as high as 17 mph.
Monday Night
A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 75. South wind 3 to 8 mph. Winds could gust as high as 15 mph.
Tuesday
A chance of showers and thunderstorms before 11am, then a chance of showers between 11am and 1pm. Mostly sunny, with a high near 90. Heat index values as high as 101. Southwest wind around 9 mph, with gusts as high as 16 mph. Chance of precipitation is 40%.
Tuesday Night
A chance of showers and thunderstorms between 1am and 4am, then a chance of showers after 4am. Partly cloudy, with a low around 73. Southwest wind 6 to 8 mph, with gusts as high as 16 mph. Chance of precipitation is 40%.
Wednesday
A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 88. West southwest wind 7 to 10 mph, with gusts as high as 17 mph. Chance of precipitation is 40%.
Wednesday Night
Showers likely and possibly a thunderstorm. Partly cloudy, with a low around 70. West southwest wind around 5 mph becoming light and variable in the evening. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Thursday
A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 84. Chance of precipitation is 50%.
Thursday Night
A chance of showers and thunderstorms, then showers likely after 1am. Mostly cloudy, with a low around 66. Chance of precipitation is 70%.
Friday
A 50 percent chance of showers before 1pm. Mostly cloudy, with a high near 80.
Friday Night
A chance of showers. Mostly cloudy, with a low around 66.
Saturday
A chance of showers. Partly sunny, with a high near 82.
Saturday Night
A chance of showers. Mostly cloudy, with a low around 68.
Sunday
Mostly sunny, with a high near 83.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles N Greenup IL
 39.28°N 88.17°W (Elev. 551 ft)
Last Update:
11:56 pm CDT Aug 9, 2026
Forecast Valid:
12am CDT Aug 10, 2026-6pm CDT Aug 16, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation