TODAY MAR01
TEMPERATURE36
HUMIDITY47
PRESSURE102880
WIND COND.120 11.2
  • 4837Fri60%
  • 6246Sat
  • 7354Sun
  • 7251Mon
  • 6240Tue
daynightWeather update from Fairfield, Fairfield Municipal Airport at
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Weather Quick Facts

  • The highest monthly average temperature in Fairfield for July is 77 degrees
  • The lowest monthly average temperature in Fairfield for January is 32.4 degrees
  • The most monthly precipitation in Fairfield occurs in August with 10.2 inches
  • The air quality index in Fairfield is 2% worse than the national average
  • The pollution index in Fairfield is 88% better than the national average

Compare Fairfield, IL Weather

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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"

      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 index434142
      Pollution index317,3873,148,6942,726,193

      Fairfield air quality information

      MeasurementTotal
      Days measured344
      Days with good air quality269
      Days with moderate air quality74
      Days w/ poor A.Q. for sensitive groups1
      Days with unhealthy air quality0

      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

      CityPopulationAir Quality IndexNational Avg.
      Johnsonville, IL504314.0%
      Wayne City, IL9344314.0%
      Springerton, IL674314.0%
      Keenes, IL534314.0%
      Belle Prairie City, IL754314.0%
      Fairfield, IL4,9124314.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Demarest, NJ4,911512.0%
      Northvale, NJ4,911512.0%
      Pascoag, RI4,9114412.0%
      Falmouth, VA4,911476.0%
      Eagar, AZ4,9104412.0%
      Fairfield, IL4,9124314.0%
      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.