TODAY DEC15
TEMPERATURE39
HUMIDITY100
PRESSURE29.99
WIND COND.40 12.8
  • 4529Sat40%
  • 4827Sun
  • 4125Mon
  • 4230Tue
  • 4937Wed
daynightWeather update from Mattoon / Charleston, Coles County Memorial Airport at

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Sullivan Average Temperature

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 Sullivan for August is 77 degrees.
  • The lowest monthly average temperature in Sullivan for February is 29 degrees.
  • The most monthly precipitation in Sullivan occurs in October with 8.2 inches.
  • The air quality index in Sullivan is 21% better than the national average.
  • The pollution index in Sullivan is 86% better than the national average.

Real Estate Listings In Sullivan

Compare Sullivan, IL Weather To Other Cities

Sullivan 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.
IndexSullivanIllinoisNational
Air quality index394150
Pollution index703,2183,347,2955,066,862

Sullivan air quality information

MeasurementTotal
Days measured365
Days with good air quality293
Days with moderate air quality72
Days w/ poor A.Q. for sensitive groups
Days with unhealthy air quality

Sullivan air quality information

PollutantTotal
Arsenic0.001%
Benzene0.020%
Carbon Tetrachloride0.000%
Lead0.000%
Mercury0.000%

Average monthly Sullivan temperature with heat index

Sullivan monthly precipitation with daily maximum

Sullivan monthly snow depth with daily maximum

Sullivan monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Atwood, IL1,1063628%
Garrett, IL793628%
Windsor, IL1,4603726%
Shelbyville, IL5,1473726%
Gays, IL2933726%
Sullivan, IL4,6753922%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Polson, MT4,6743824%
Jim Thorpe, PA4,676476%
Marienville, PA4,6731962%
La Grange, TX4,6734118%
Becker, MN4,6773334%
Sullivan, IL4,6753922%
Source: The Sullivan, 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.