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.

Fog/Mist

37°F

3°C

Humidity 96%
Wind Speed SE 5 mph
Barometer 30.15 in (1021.4 mb)
Dewpoint 36°F (2°C)
Visibility 5.00 mi
Wind Chill33°F (1°C)
Last update 3 Mar 1:53 am CST
Extended Forecast for

Charleston IL

  • Overnight

    Overnight: A 50 percent chance of showers after 5am. Patchy fog. Otherwise, cloudy, with a low around 36. East southeast wind 3 to 5 mph.

    Low: 36 °F

    Chance
    Showers and
    Patchy Fog

  • Tuesday

    Tuesday: Showers, with thunderstorms also possible after noon. Areas of fog. High near 48. Light and variable wind becoming east southeast around 5 mph in the afternoon. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 48 °F

    Showers and
    Areas Fog

  • Tuesday Night

    Tuesday Night: Showers and possibly a thunderstorm. Areas of fog. Low around 44. East northeast wind 5 to 8 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.

    Low: 44 °F

    Showers and
    Areas Fog

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm. Patchy fog before noon. High near 58. East wind 5 to 7 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    High: 58 °F

    Showers and
    Patchy Fog

  • Wednesday Night

    Wednesday Night: Rain and possibly a thunderstorm. Low around 52. South wind 3 to 8 mph. Winds could gust as high as 15 mph. Chance of precipitation is 90%. New rainfall amounts between three quarters and one inch possible.

    Low: 52 °F

    Rain

  • Thursday

    Thursday: Rain, mainly before noon. High near 65. South southwest wind 7 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 65 °F

    Rain then
    Chance Rain

  • Thursday Night

    Thursday Night: A 40 percent chance of rain. Mostly cloudy, with a low around 51. West southwest wind 5 to 7 mph becoming south southeast after midnight.

    Low: 51 °F

    Chance Rain

  • Friday

    Friday: A 50 percent chance of rain. Mostly cloudy, with a high near 73.

    High: 73 °F

    Chance Rain

  • Friday Night

    Friday Night: A chance of rain, then rain likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 58. Chance of precipitation is 60%.

    Low: 58 °F

    Chance Rain
    then Rain
    Likely

Detailed Forecast

Overnight
A 50 percent chance of showers after 5am. Patchy fog. Otherwise, cloudy, with a low around 36. East southeast wind 3 to 5 mph.
Tuesday
Showers, with thunderstorms also possible after noon. Areas of fog. High near 48. Light and variable wind becoming east southeast around 5 mph in the afternoon. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Tuesday Night
Showers and possibly a thunderstorm. Areas of fog. Low around 44. East northeast wind 5 to 8 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.
Wednesday
Showers and possibly a thunderstorm. Patchy fog before noon. High near 58. East wind 5 to 7 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday Night
Rain and possibly a thunderstorm. Low around 52. South wind 3 to 8 mph. Winds could gust as high as 15 mph. Chance of precipitation is 90%. New rainfall amounts between three quarters and one inch possible.
Thursday
Rain, mainly before noon. High near 65. South southwest wind 7 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Thursday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 51. West southwest wind 5 to 7 mph becoming south southeast after midnight.
Friday
A 50 percent chance of rain. Mostly cloudy, with a high near 73.
Friday Night
A chance of rain, then rain likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 58. Chance of precipitation is 60%.
Saturday
Rain likely, mainly before noon. Cloudy, with a high near 67. Chance of precipitation is 70%.
Saturday Night
Mostly cloudy, with a low around 42.
Sunday
Mostly sunny, with a high near 62.
Sunday Night
Mostly clear, with a low around 47.
Monday
Sunny, with a high near 68.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Charleston IL
 39.48°N 88.19°W (Elev. 650 ft)
Last Update:
1:51 am CST Mar 3, 2026
Forecast Valid:
2am CST Mar 3, 2026-6pm CDT Mar 9, 2026
 
Forecast Discussion
 
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Additional Resources

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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