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

Martinsville IL

Frost Advisory April 20, 05:53am until April 20, 08:00am
Click here for hazard details and duration
...
  •  
    Frost Advisory April 20, 05:53am until April 20, 08:00am

    NOW until 8:00am Mon

    Frost Advisory

  • Today

    High: 61 °F

    Areas Frost
    then Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 45. South southeast wind 5 to 9 mph, with gusts as high as 18 mph.

    Low: 45 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 76. Southwest wind 9 to 18 mph, with gusts as high as 31 mph.

    High: 76 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers after 1am. Partly cloudy, with a low around 57. Southwest wind 10 to 14 mph, with gusts as high as 24 mph.

    Low: 57 °F

    Mostly Clear
    then Chance
    Showers

  • Wednesday

    Wednesday: Mostly sunny, with a high near 76. West southwest wind around 10 mph, with gusts as high as 17 mph.

    High: 76 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 56. South southwest wind around 6 mph.

    Low: 56 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 79. South wind 7 to 17 mph, with gusts as high as 28 mph.

    High: 79 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A 40 percent chance of showers after 1am. Mostly cloudy, with a low around 63.

    Low: 63 °F

    Partly Cloudy
    then Chance
    Showers

Detailed Forecast

Today
Areas of frost before 8am. Otherwise, sunny, with a high near 61. Light and variable wind.
Tonight
Mostly clear, with a low around 45. South southeast wind 5 to 9 mph, with gusts as high as 18 mph.
Tuesday
Mostly sunny, with a high near 76. Southwest wind 9 to 18 mph, with gusts as high as 31 mph.
Tuesday Night
A 30 percent chance of showers after 1am. Partly cloudy, with a low around 57. Southwest wind 10 to 14 mph, with gusts as high as 24 mph.
Wednesday
Mostly sunny, with a high near 76. West southwest wind around 10 mph, with gusts as high as 17 mph.
Wednesday Night
Mostly clear, with a low around 56. South southwest wind around 6 mph.
Thursday
Mostly sunny, with a high near 79. South wind 7 to 17 mph, with gusts as high as 28 mph.
Thursday Night
A 40 percent chance of showers after 1am. Mostly cloudy, with a low around 63.
Friday
Showers likely, then showers and possibly a thunderstorm after 1pm. High near 74. Chance of precipitation is 80%.
Friday Night
A chance of showers, with thunderstorms also possible after 1am. Mostly cloudy, with a low around 53. Chance of precipitation is 50%.
Saturday
A chance of showers. Mostly sunny, with a high near 71.
Saturday Night
A chance of showers. Partly cloudy, with a low around 50.
Sunday
Mostly sunny, with a high near 72.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Martinsville IL
 39.34°N 87.88°W (Elev. 600 ft)
Last Update:
4:37 am CDT Apr 20, 2026
Forecast Valid:
5am 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