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.

N/A

Humidity NA
Wind Speed NA
Barometer NA
Dewpoint N/A
Visibility NA
Last update *** Not a current observation ***
Extended Forecast for

Greenup IL

Frost Advisory April 20, 01:00am until April 20, 08:00am
Click here for hazard details and duration
Frost Advisory

  • Overnight

    Overnight: Areas of frost after 4am. Otherwise, mostly clear, with a low around 36. North wind around 5 mph becoming calm.

    Low: 36 °F

    Areas Frost

  • Monday

    Monday: Areas of frost before 8am. Otherwise, sunny, with a high near 62. Calm wind becoming east northeast around 5 mph.

    High: 62 °F

    Areas Frost
    then Sunny

  • Monday Night

    Monday Night: Increasing clouds, with a low around 46. South southeast wind 5 to 8 mph, with gusts as high as 16 mph.

    Low: 46 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: Mostly sunny, with a high near 75. Southwest wind 8 to 17 mph, with gusts as high as 29 mph.

    High: 75 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 57. Southwest wind 9 to 13 mph, with gusts as high as 22 mph.

    Low: 57 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 76. West southwest wind around 9 mph, with gusts as high as 16 mph.

    High: 76 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 57. South wind around 7 mph.

    Low: 57 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 79. Breezy.

    High: 79 °F

    Sunny then
    Mostly Sunny
    and Breezy

  • Thursday Night

    Thursday Night: Showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 62. Chance of precipitation is 60%.

    Low: 62 °F

    Partly Cloudy
    then Showers
    Likely

Detailed Forecast

Overnight
Areas of frost after 4am. Otherwise, mostly clear, with a low around 36. North wind around 5 mph becoming calm.
Monday
Areas of frost before 8am. Otherwise, sunny, with a high near 62. Calm wind becoming east northeast around 5 mph.
Monday Night
Increasing clouds, with a low around 46. South southeast wind 5 to 8 mph, with gusts as high as 16 mph.
Tuesday
Mostly sunny, with a high near 75. Southwest wind 8 to 17 mph, with gusts as high as 29 mph.
Tuesday Night
Mostly clear, with a low around 57. Southwest wind 9 to 13 mph, with gusts as high as 22 mph.
Wednesday
Mostly sunny, with a high near 76. West southwest wind around 9 mph, with gusts as high as 16 mph.
Wednesday Night
Mostly clear, with a low around 57. South wind around 7 mph.
Thursday
Sunny, with a high near 79. Breezy.
Thursday Night
Showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 62. Chance of precipitation is 60%.
Friday
Showers likely, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 75. Chance of precipitation is 70%.
Friday Night
A chance of showers. Mostly cloudy, with a low around 52.
Saturday
Partly sunny, with a high near 68.
Saturday Night
A chance of showers. Partly cloudy, with a low around 50.
Sunday
Mostly sunny, with a high near 68.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Greenup IL
 39.26°N 88.17°W (Elev. 541 ft)
Last Update:
12:35 am CDT Apr 20, 2026
Forecast Valid:
12am CDT Apr 20, 2026-6pm CDT Apr 26, 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