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

40°F

4°C

Humidity 68%
Wind Speed NW 7 mph
Barometer 30.16 in (1021.5 mb)
Dewpoint 30°F (-1°C)
Visibility 10.00 mi
Wind Chill35°F (2°C)
Last update 18 Apr 10:53 pm CDT
Extended Forecast for

Charleston IL

Frost Advisory April 19, 01:00am until April 19, 08:00am
Click here for hazard details and duration
Frost Advisory

  • Tonight

    Tonight: Clear, with a low around 35. West southwest wind around 7 mph.

    Low: 35 °F

    Clear

  • Sunday

    Sunday: Patchy frost before 8am. Otherwise, sunny, with a high near 60. West wind 6 to 11 mph increasing to 13 to 18 mph in the afternoon. Winds could gust as high as 31 mph.

    High: 60 °F

    Patchy Frost
    then Mostly
    Sunny

  • Sunday Night

    Sunday Night: Patchy frost after 4am. Otherwise, mostly clear, with a low around 34. North northwest wind 9 to 14 mph becoming light north after midnight. Winds could gust as high as 22 mph.

    Low: 34 °F

    Mostly Clear
    then Patchy
    Frost

  • Monday

    Monday: Patchy frost before 8am. Otherwise, sunny, with a high near 59. Light and variable wind.

    High: 59 °F

    Patchy Frost
    then Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 45. South wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 45 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 75. South southwest wind 10 to 17 mph, with gusts as high as 29 mph.

    High: 75 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 56. Southwest wind around 10 mph, with gusts as high as 21 mph.

    Low: 56 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 76.

    High: 76 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 58.

    Low: 58 °F

    Mostly Clear

Detailed Forecast

Tonight
Clear, with a low around 35. West southwest wind around 7 mph.
Sunday
Patchy frost before 8am. Otherwise, sunny, with a high near 60. West wind 6 to 11 mph increasing to 13 to 18 mph in the afternoon. Winds could gust as high as 31 mph.
Sunday Night
Patchy frost after 4am. Otherwise, mostly clear, with a low around 34. North northwest wind 9 to 14 mph becoming light north after midnight. Winds could gust as high as 22 mph.
Monday
Patchy frost before 8am. Otherwise, sunny, with a high near 59. Light and variable wind.
Monday Night
Mostly clear, with a low around 45. South wind 5 to 10 mph, with gusts as high as 20 mph.
Tuesday
Mostly sunny, with a high near 75. South southwest wind 10 to 17 mph, with gusts as high as 29 mph.
Tuesday Night
Partly cloudy, with a low around 56. Southwest wind around 10 mph, with gusts as high as 21 mph.
Wednesday
Mostly sunny, with a high near 76.
Wednesday Night
Mostly clear, with a low around 58.
Thursday
Mostly sunny, with a high near 80.
Thursday Night
A chance of showers. Partly cloudy, with a low around 61.
Friday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 73.
Friday Night
Showers likely. Mostly cloudy, with a low around 49.
Saturday
Partly sunny, with a high near 66.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Charleston IL
 39.5°N 88.19°W (Elev. 650 ft)
Last Update:
10:36 pm CDT Apr 18, 2026
Forecast Valid:
11pm CDT Apr 18, 2026-6pm CDT Apr 25, 2026
 
Forecast Discussion
 
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Additional Resources

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