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.

Overcast

66°F

19°C

Humidity 93%
Wind Speed S 10 mph
Barometer 30.06 in (1017.5 mb)
Dewpoint 64°F (18°C)
Visibility 8.00 mi
Last update 25 Jul 9:53 am CDT
Extended Forecast for

Arthur IL

  • Today

    Today: A 40 percent chance of showers and thunderstorms, mainly before noon. Cloudy, with a high near 79. South wind around 8 mph.

    High: 79 °F

    Chance
    Showers then
    Slight Chance
    T-storms

  • Tonight

    Tonight: Mostly cloudy, with a low around 69. Light south southeast wind.

    Low: 69 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 90. Heat index values as high as 102. Calm wind becoming southwest around 6 mph in the afternoon.

    High: 90 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 73. South southwest wind 3 to 7 mph.

    Low: 73 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny and hot, with a high near 95. South southwest wind 8 to 15 mph, with gusts as high as 24 mph.

    High: 95 °F

    Hot

  • Monday Night

    Monday Night: A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 1am. Mostly clear, with a low around 74. Southwest wind 7 to 11 mph, with gusts as high as 18 mph. Chance of precipitation is 30%.

    Low: 74 °F

    Chance
    T-storms then
    Chance
    Showers

  • Tuesday

    Tuesday: Sunny, with a high near 90. North wind 8 to 11 mph, with gusts as high as 18 mph.

    High: 90 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 65.

    Low: 65 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 88.

    High: 88 °F

    Sunny

Detailed Forecast

Today
A 40 percent chance of showers and thunderstorms, mainly before noon. Cloudy, with a high near 79. South wind around 8 mph.
Tonight
Mostly cloudy, with a low around 69. Light south southeast wind.
Sunday
Partly sunny, with a high near 90. Heat index values as high as 102. Calm wind becoming southwest around 6 mph in the afternoon.
Sunday Night
Partly cloudy, with a low around 73. South southwest wind 3 to 7 mph.
Monday
Mostly sunny and hot, with a high near 95. South southwest wind 8 to 15 mph, with gusts as high as 24 mph.
Monday Night
A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 1am. Mostly clear, with a low around 74. Southwest wind 7 to 11 mph, with gusts as high as 18 mph. Chance of precipitation is 30%.
Tuesday
Sunny, with a high near 90. North wind 8 to 11 mph, with gusts as high as 18 mph.
Tuesday Night
Mostly clear, with a low around 65.
Wednesday
Sunny, with a high near 88.
Wednesday Night
Mostly clear, with a low around 66.
Thursday
Sunny, with a high near 89.
Thursday Night
Mostly clear, with a low around 67.
Friday
Mostly sunny, with a high near 88.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Arthur IL
 39.71°N 88.46°W (Elev. 663 ft)
Last Update:
9:36 am CDT Jul 25, 2026
Forecast Valid:
10am CDT Jul 25, 2026-6pm CDT Jul 31, 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