TODAY AUG19
TEMPERATURE70
HUMIDITY90
PRESSURE29.97
WIND COND.30 4.7
  • 8467Sun
  • 8068Mon70%60%
  • 7760Tue30%30%
  • 7555Wed
  • 7858Thu
daynightWeather update from Mattoon / Charleston, Coles County Memorial Airport at

Mattoon Average Weather

In the event that the weather data was unavailable for this city, estimates based upon nearby cities were used.
MonthTemp. (min)Temp. (max)Temp. (avg)Precipitation
January25°F39°F31°F6.1"
February23°F37°F29°F2.4"
March37°F55°F45°F4.1"
April44°F65°F53°F3.9"
May55°F77°F65°F2.6"
June64°F85°F75°F4.7"
July65°F86°F75°F8.2"
August68°F88°F77°F7.2"
September59°F83°F71°F8.1"
October49°F69°F58°F8.2"
November36°F54°F44°F3.6"
December25°F38°F31°F2.6"

Did you know?

  • The highest monthly average temperature in Mattoon for August is 77 degrees.
  • The lowest monthly average temperature in Mattoon for February is 29 degrees.
  • The most monthly precipitation in Mattoon occurs in October with 8.2 inches.
  • The air quality index in Mattoon is 25% better than the national average.
  • The pollution index in Mattoon is 67% better than the national average.

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Compare Mattoon, IL Weather To Other Cities

Mattoon air quality index & pollution index

In the event that the air quality/pollution data was unavailable for this city, estimates based upon nearby cities were used.
IndexMattoonIllinoisNational
Air quality index374150
Pollution index1,664,3703,347,2955,066,862

Mattoon air quality information

MeasurementTotal
Days measured214
Days with good air quality201
Days with moderate air quality13
Days w/ poor A.Q. for sensitive groups
Days with unhealthy air quality

Mattoon air quality information

PollutantTotal
Arsenic0.001%
Benzene0.040%
Carbon Tetrachloride0.000%
Lead0.030%
Mercury0.003%

Average monthly Mattoon temperature with heat index

Mattoon monthly precipitation with daily maximum

Mattoon monthly snow depth with daily maximum

Mattoon monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Arcola, IL2,8813628%
Humboldt, IL4833628%
Hindsboro, IL3493628%
Strasburg, IL5013726%
Windsor, IL1,4603726%
Mattoon, IL17,3993726%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
New Philadelphia, OH17,4123922%
East Cleveland, OH17,4135510%
Concord, MO17,4156020%
North Canton, OH17,4223922%
Santa Fe Springs, CA17,4367448%
Mattoon, IL17,3993726%
Source: The Mattoon, IL weather data displayed above is derived from the NOAA (National Oceanic and Atmospheric). Air quality and pollution data is derived from the EPA (United States Environmental Protection Agency). Air quality and pollution levels measured in a particular area may not be representative of the entire county.