National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Mattoon / Charleston, Coles County Memorial Airport (KMTO)

Lat: 39.48°NLon: 88.28°WElev: 722ft.

Fair

60°F

16°C

Humidity 93%
Wind Speed S 12 mph
Barometer 29.86 in (1010.9 mb)
Dewpoint 58°F (14°C)
Visibility 10.00 mi
Last update 10 Mar 2:53 am CDT
Extended Forecast for

Charleston IL

  • Overnight

    Overnight: Mostly cloudy, with a low around 60. South southwest wind around 11 mph, with gusts as high as 23 mph.

    Low: 60 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 75. South southwest wind 10 to 17 mph, with gusts as high as 26 mph.

    High: 75 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 4am. Low around 61. South southwest wind 16 to 18 mph, with gusts as high as 33 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 61 °F

    Chance
    T-storms then
    T-storms

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm before 1pm, then showers likely. Temperature falling to around 48 by 5pm. Breezy, with a southwest wind 18 to 21 mph becoming northwest in the afternoon. Winds could gust as high as 33 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 67 °F⇓

    Breezy.
    T-storms then
    Showers

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers before 7pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 31. Blustery, with a north northwest wind 15 to 20 mph decreasing to 8 to 13 mph after midnight. Winds could gust as high as 30 mph.

    Low: 31 °F

    Chance
    Showers and
    Blustery then
    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 49. North northwest wind 6 to 9 mph becoming west southwest in the afternoon. Winds could gust as high as 16 mph.

    High: 49 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 41. Breezy, with a south wind 8 to 13 mph increasing to 17 to 22 mph after midnight. Winds could gust as high as 37 mph.

    Low: 41 °F

    Mostly Cloudy
    then Mostly
    Cloudy and
    Breezy

  • Friday

    Friday: Mostly cloudy, with a high near 58. Breezy.

    High: 58 °F

    Mostly Cloudy
    and Breezy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 35.

    Low: 35 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 60. South southwest wind around 11 mph, with gusts as high as 23 mph.
Tuesday
Partly sunny, with a high near 75. South southwest wind 10 to 17 mph, with gusts as high as 26 mph.
Tuesday Night
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 4am. Low around 61. South southwest wind 16 to 18 mph, with gusts as high as 33 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday
Showers and possibly a thunderstorm before 1pm, then showers likely. Temperature falling to around 48 by 5pm. Breezy, with a southwest wind 18 to 21 mph becoming northwest in the afternoon. Winds could gust as high as 33 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
Wednesday Night
A 30 percent chance of showers before 7pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 31. Blustery, with a north northwest wind 15 to 20 mph decreasing to 8 to 13 mph after midnight. Winds could gust as high as 30 mph.
Thursday
Sunny, with a high near 49. North northwest wind 6 to 9 mph becoming west southwest in the afternoon. Winds could gust as high as 16 mph.
Thursday Night
Mostly cloudy, with a low around 41. Breezy, with a south wind 8 to 13 mph increasing to 17 to 22 mph after midnight. Winds could gust as high as 37 mph.
Friday
Mostly cloudy, with a high near 58. Breezy.
Friday Night
Mostly cloudy, with a low around 35.
Saturday
Partly sunny, with a high near 60.
Saturday Night
Mostly cloudy, with a low around 47.
Sunday
Rain. Cloudy, with a high near 59. Breezy.
Sunday Night
A chance of rain and snow. Mostly cloudy, with a low around 22. Blustery.
Monday
Partly sunny, with a high near 32.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Charleston IL
 39.5°N 88.19°W (Elev. 650 ft)
Last Update:
3:11 am CDT Mar 10, 2026
Forecast Valid:
3am CDT Mar 10, 2026-6pm CDT Mar 16, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation