National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Areas of Dangerous Heat and Heavy Rain with Possible Flooding into this Weekend

Hot temperatures and high humidity are forecast to continue across much of northeast Texas into the mid-Mississippi Valley into this weekend with heat advisories in effect. Heavy to excessive rainfall occurring at times through Saturday could bring areas of flooding across parts of the central Plains into the upper Midwest/Great Lakes, and Four Corners states. Read More >

Hazardous Weather Conditions

Current conditions at

Mattoon / Charleston, Coles County Memorial Airport (KMTO)

Lat: 39.48°NLon: 88.28°WElev: 722ft.

Fair

75°F

24°C

Humidity 90%
Wind Speed S 6 mph
Barometer 30.21 in (1022.3 mb)
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Last update 17 Sep 2:53 am CDT
Extended Forecast for

Arthur IL

  • Overnight

    Overnight: Partly cloudy, with a low around 72. South wind 3 to 5 mph.

    Low: 72 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny and hot, with a high near 95. Heat index values as high as 101. Southwest wind 5 to 8 mph becoming northeast in the afternoon.

    High: 95 °F

    Hot

  • Thursday Night

    Thursday Night: A slight chance of showers and thunderstorms before 1am, then a slight chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 69. North northwest wind around 6 mph becoming northeast in the evening. Chance of precipitation is 20%.

    Low: 69 °F

    Slight Chance
    T-storms

  • Friday

    Friday: A 30 percent chance of showers and thunderstorms before 7am. Mostly sunny, with a high near 89. East northeast wind 5 to 7 mph.

    High: 89 °F

    Chance
    T-storms then
    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 68. East northeast wind 7 to 9 mph becoming south southeast after midnight.

    Low: 68 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 94. South wind 8 to 10 mph becoming west southwest in the afternoon. Winds could gust as high as 17 mph.

    High: 94 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A 40 percent chance of showers after 1am. Mostly cloudy, with a low around 71. Southwest wind around 6 mph.

    Low: 71 °F

    Mostly Cloudy
    then Chance
    Showers

  • Sunday

    Sunday: A 30 percent chance of showers after 1pm. Partly sunny, with a high near 87.

    High: 87 °F

    Partly Sunny
    then Chance
    Showers

  • Sunday Night

    Sunday Night: A 40 percent chance of showers after 1am. Mostly cloudy, with a low around 64.

    Low: 64 °F

    Mostly Cloudy
    then Chance
    Showers

Detailed Forecast

Overnight
Partly cloudy, with a low around 72. South wind 3 to 5 mph.
Thursday
Mostly sunny and hot, with a high near 95. Heat index values as high as 101. Southwest wind 5 to 8 mph becoming northeast in the afternoon.
Thursday Night
A slight chance of showers and thunderstorms before 1am, then a slight chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 69. North northwest wind around 6 mph becoming northeast in the evening. Chance of precipitation is 20%.
Friday
A 30 percent chance of showers and thunderstorms before 7am. Mostly sunny, with a high near 89. East northeast wind 5 to 7 mph.
Friday Night
Partly cloudy, with a low around 68. East northeast wind 7 to 9 mph becoming south southeast after midnight.
Saturday
Mostly sunny, with a high near 94. South wind 8 to 10 mph becoming west southwest in the afternoon. Winds could gust as high as 17 mph.
Saturday Night
A 40 percent chance of showers after 1am. Mostly cloudy, with a low around 71. Southwest wind around 6 mph.
Sunday
A 30 percent chance of showers after 1pm. Partly sunny, with a high near 87.
Sunday Night
A 40 percent chance of showers after 1am. Mostly cloudy, with a low around 64.
Monday
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 80.
Monday Night
A chance of showers. Mostly cloudy, with a low around 59.
Tuesday
Mostly sunny, with a high near 77.
Tuesday Night
Mostly clear, with a low around 57.
Wednesday
Mostly sunny, with a high near 79.
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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:
1:26 am CDT Sep 17, 2026
Forecast Valid:
3am CDT Sep 17, 2026-6pm CDT Sep 23, 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