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

7°F

-14°C

Humidity 87%
Wind Speed Calm
Barometer 30.13 in (1021.6 mb)
Dewpoint 4°F (-16°C)
Visibility 10.00 mi
Last update 5 Dec 1:53 am CST
Extended Forecast for

Casey IL

  • Overnight

    Overnight: Patchy freezing fog. Partly cloudy, with a low around 10. Calm wind.

    Low: 10 °F

    Patchy
    Freezing Fog

  • Friday

    Friday: Sunny, with a high near 31. Calm wind becoming south southwest 5 to 8 mph in the morning.

    High: 31 °F

    Sunny

  • Friday Night

    Friday Night: Increasing clouds, with a low around 24. South wind 8 to 11 mph becoming west southwest after midnight. Winds could gust as high as 20 mph.

    Low: 24 °F

    Increasing
    Clouds

  • Saturday

    Saturday: Mostly cloudy, with a high near 34. West wind 5 to 7 mph becoming light and variable in the afternoon.

    High: 34 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: A 30 percent chance of snow after midnight. Mostly cloudy, with a low around 24. Light and variable wind becoming east southeast around 6 mph after midnight.

    Low: 24 °F

    Mostly Cloudy
    then Chance
    Snow

  • Sunday

    Sunday: A chance of snow, mixing with rain after 9am, then gradually ending. Mostly cloudy, with a high near 35. Southeast wind 6 to 14 mph becoming north in the morning. Winds could gust as high as 20 mph. Chance of precipitation is 50%.

    High: 35 °F

    Chance
    Rain/Snow
    then Mostly
    Cloudy

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 12. North wind 6 to 13 mph, with gusts as high as 17 mph.

    Low: 12 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 27.

    High: 27 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 17.

    Low: 17 °F

    Partly Cloudy

Detailed Forecast

Overnight
Patchy freezing fog. Partly cloudy, with a low around 10. Calm wind.
Friday
Sunny, with a high near 31. Calm wind becoming south southwest 5 to 8 mph in the morning.
Friday Night
Increasing clouds, with a low around 24. South wind 8 to 11 mph becoming west southwest after midnight. Winds could gust as high as 20 mph.
Saturday
Mostly cloudy, with a high near 34. West wind 5 to 7 mph becoming light and variable in the afternoon.
Saturday Night
A 30 percent chance of snow after midnight. Mostly cloudy, with a low around 24. Light and variable wind becoming east southeast around 6 mph after midnight.
Sunday
A chance of snow, mixing with rain after 9am, then gradually ending. Mostly cloudy, with a high near 35. Southeast wind 6 to 14 mph becoming north in the morning. Winds could gust as high as 20 mph. Chance of precipitation is 50%.
Sunday Night
Mostly cloudy, with a low around 12. North wind 6 to 13 mph, with gusts as high as 17 mph.
Monday
Mostly sunny, with a high near 27.
Monday Night
Partly cloudy, with a low around 17.
Tuesday
Partly sunny, with a high near 38.
Tuesday Night
Mostly cloudy, with a low around 31.
Wednesday
A chance of rain. Mostly cloudy, with a high near 42.
Wednesday Night
Mostly cloudy, with a low around 18.
Thursday
Mostly cloudy, with a high near 29.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Casey IL
 39.3°N 88°W (Elev. 643 ft)
Last Update:
1:01 am CST Dec 5, 2025
Forecast Valid:
2am CST Dec 5, 2025-6pm CST Dec 11, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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