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.

Light Rain

68°F

20°C

Humidity 84%
Wind Speed S 13 G 22 mph
Barometer 29.85 in (1010.3 mb)
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Last update 16 May 5:53 am CDT
Extended Forecast for

Charleston IL

  • Today

    Today: Showers and thunderstorms likely before 8am, then showers and possibly a thunderstorm between 8am and 10am, then a chance of showers and thunderstorms after 10am. High near 78. South southwest wind 8 to 14 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 78 °F

    Showers then
    Chance
    T-storms

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms, mainly before midnight. Mostly cloudy, with a low around 63. South southeast wind 5 to 8 mph, with gusts as high as 16 mph.

    Low: 63 °F

    Chance
    T-storms

  • Sunday

    Sunday: Partly sunny, then gradually becoming sunny, with a high near 84. South wind 9 to 16 mph, with gusts as high as 28 mph.

    High: 84 °F

    Becoming
    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 65. South wind 11 to 13 mph, with gusts as high as 23 mph.

    Low: 65 °F

    Mostly Clear

  • Monday

    Monday: Showers likely and possibly a thunderstorm between 1pm and 4pm, then showers and thunderstorms likely after 4pm. Mostly sunny, with a high near 84. Breezy, with a south wind 14 to 20 mph, with gusts as high as 33 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 84 °F

    Mostly Sunny
    then T-storms
    Likely and
    Breezy

  • Monday Night

    Monday Night: Showers and thunderstorms likely before 10pm, then a chance of showers between 10pm and 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 69. South wind around 14 mph, with gusts as high as 25 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 69 °F

    T-storms
    Likely

  • Tuesday

    Tuesday: A chance of showers, then showers and possibly a thunderstorm after 1pm. High near 83. South southwest wind 15 to 18 mph, with gusts as high as 32 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 83 °F

    Chance
    Showers then
    Showers

  • Tuesday Night

    Tuesday Night: Showers and possibly a thunderstorm before 1am, then showers likely. Low around 60. Chance of precipitation is 80%.

    Low: 60 °F

    Showers

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 71.

    High: 71 °F

    Mostly Cloudy

Detailed Forecast

Today
Showers and thunderstorms likely before 8am, then showers and possibly a thunderstorm between 8am and 10am, then a chance of showers and thunderstorms after 10am. High near 78. South southwest wind 8 to 14 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
Tonight
A 30 percent chance of showers and thunderstorms, mainly before midnight. Mostly cloudy, with a low around 63. South southeast wind 5 to 8 mph, with gusts as high as 16 mph.
Sunday
Partly sunny, then gradually becoming sunny, with a high near 84. South wind 9 to 16 mph, with gusts as high as 28 mph.
Sunday Night
Mostly clear, with a low around 65. South wind 11 to 13 mph, with gusts as high as 23 mph.
Monday
Showers likely and possibly a thunderstorm between 1pm and 4pm, then showers and thunderstorms likely after 4pm. Mostly sunny, with a high near 84. Breezy, with a south wind 14 to 20 mph, with gusts as high as 33 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Monday Night
Showers and thunderstorms likely before 10pm, then a chance of showers between 10pm and 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 69. South wind around 14 mph, with gusts as high as 25 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tuesday
A chance of showers, then showers and possibly a thunderstorm after 1pm. High near 83. South southwest wind 15 to 18 mph, with gusts as high as 32 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tuesday Night
Showers and possibly a thunderstorm before 1am, then showers likely. Low around 60. Chance of precipitation is 80%.
Wednesday
Mostly cloudy, with a high near 71.
Wednesday Night
Mostly cloudy, with a low around 50.
Thursday
Partly sunny, with a high near 69.
Thursday Night
Mostly cloudy, with a low around 51.
Friday
Mostly sunny, with a high near 73.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Charleston IL
 39.48°N 88.19°W (Elev. 650 ft)
Last Update:
5:41 am CDT May 16, 2026
Forecast Valid:
6am CDT May 16, 2026-6pm CDT May 22, 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