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

40°F

4°C

Humidity 60%
Wind Speed S 7 mph
Barometer 30.09 in (1019.1 mb)
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Wind Chill35°F (2°C)
Last update 14 Feb 12:53 am CST
Extended Forecast for

Charleston IL

  • Overnight

    Overnight: Partly cloudy, with a low around 31. South wind 5 to 7 mph.

    Low: 31 °F

    Partly Cloudy

  • Saturday

    Saturday: A 30 percent chance of rain, mainly after noon. Cloudy, with a high near 51. South wind 3 to 6 mph.

    High: 51 °F

    Chance Rain

  • Saturday Night

    Saturday Night: Rain likely. Patchy fog after 2am. Otherwise, cloudy, with a low around 41. East southeast wind 3 to 6 mph. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 41 °F

    Rain Likely
    and Patchy
    Fog

  • Sunday

    Sunday: Patchy fog before 7am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 55. East northeast wind 3 to 8 mph.

    High: 55 °F

    Patchy Fog
    then Mostly
    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 36. Calm wind.

    Low: 36 °F

    Mostly Clear

  • Washington's Birthday

    Washington's Birthday: Partly sunny, with a high near 57. Calm wind becoming south 5 to 8 mph in the morning. Winds could gust as high as 15 mph.

    High: 57 °F

    Partly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 41. South wind around 6 mph.

    Low: 41 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 59.

    High: 59 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 51.

    Low: 51 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Partly cloudy, with a low around 31. South wind 5 to 7 mph.
Saturday
A 30 percent chance of rain, mainly after noon. Cloudy, with a high near 51. South wind 3 to 6 mph.
Saturday Night
Rain likely. Patchy fog after 2am. Otherwise, cloudy, with a low around 41. East southeast wind 3 to 6 mph. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.
Sunday
Patchy fog before 7am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 55. East northeast wind 3 to 8 mph.
Sunday Night
Mostly clear, with a low around 36. Calm wind.
Washington's Birthday
Partly sunny, with a high near 57. Calm wind becoming south 5 to 8 mph in the morning. Winds could gust as high as 15 mph.
Monday Night
Mostly cloudy, with a low around 41. South wind around 6 mph.
Tuesday
Mostly cloudy, with a high near 59.
Tuesday Night
Mostly cloudy, with a low around 51.
Wednesday
Partly sunny, with a high near 66.
Wednesday Night
Mostly cloudy, with a low around 43.
Thursday
A chance of rain. Partly sunny, with a high near 60.
Thursday Night
A chance of rain. Partly cloudy, with a low around 37.
Friday
Mostly sunny, with a high near 51.
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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:
12:36 am CST Feb 14, 2026
Forecast Valid:
1am CST Feb 14, 2026-6pm CST Feb 20, 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