TODAY OCT18
TEMPERATURE
HUMIDITY
PRESSURE
WIND COND.
  • 5847Fri50%
  • 6133Sat
  • 5234Sun
  • 5839Mon
  • 6142Tue
daynightWeather update from Harrisburg-Raleigh Airport at
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Fairfield 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°F41°F32°F8.1"
February27°F44°F34°F1.6"
March39°F58°F47°F5.3"
April48°F69°F58°F10.0"
May57°F77°F66°F5.8"
June66°F86°F76°F3.6"
July68°F87°F77°F8.5"
August66°F86°F75°F10.2"
September59°F81°F69°F6.4"
October48°F70°F58°F6.6"
November37°F57°F46°F6.8"
December30°F45°F37°F4.1"

Did you know?

  • The highest monthly average temperature in Fairfield for July is 77 degrees.
  • The lowest monthly average temperature in Fairfield for January is 32 degrees.
  • The most monthly precipitation in Fairfield occurs in August with 10.2 inches.
  • The air quality index in Fairfield is 21% better than the national average.
  • The pollution index in Fairfield is 93% better than the national average.

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Compare Fairfield, IL Weather To Other Cities

Fairfield 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.
IndexFairfieldIllinoisNational
Air quality index394150
Pollution index317,3873,347,2955,066,862

Fairfield air quality information

MeasurementTotal
Days measured243
Days with good air quality204
Days with moderate air quality39
Days w/ poor A.Q. for sensitive groups
Days with unhealthy air quality

Fairfield air quality information

PollutantTotal
Arsenic0.000%
Benzene0.010%
Carbon Tetrachloride0.000%
Lead0.000%
Mercury0.000%

Average monthly Fairfield temperature with heat index

Fairfield monthly precipitation with daily maximum

Fairfield monthly snow depth with daily maximum

Fairfield monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Burnt Prairie, IL593922%
Johnsonville, IL583922%
Sims, IL2763922%
Cisne, IL6113922%
Keenes, IL603922%
Fairfield, IL4,9443922%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Chester, MD4,944468%
Needles, CA4,9451864%
Eagar, AZ4,9434216%
Medina, TX4,9473824%
Circle Pines, MN4,9474412%
Fairfield, IL4,9443922%
Source: The Fairfield, 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.