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Key findings

  • The highest monthly average temperature in Brooklyn for July is 78.8 degrees
  • The lowest monthly average temperature in Brooklyn for January is 32.5 degrees
  • The most monthly precipitation in Brooklyn occurs in April with 5.3 inches
  • The air quality index in Brooklyn is 9% worse than the national average
  • The pollution index in Brooklyn is 67% worse than the national average

Compare Brooklyn, IL Weather

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      Brooklyn 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
      January24°F43°F32°F1.8"
      February26°F45°F34°F1.6"
      March37°F59°F47°F3.7"
      April47°F70°F58°F5.3"
      May56°F78°F67°F4.8"
      June65°F88°F76°F4.4"
      July68°F90°F79°F3.9"
      August66°F89°F77°F3.1"
      September58°F82°F69°F4.2"
      October47°F71°F58°F3.1"
      November36°F58°F46°F2.8"
      December29°F45°F36°F3.1"

      Brooklyn 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.
      IndexBrooklynIllinoisNational
      Air quality index544150
      Pollution index8,473,0503,347,2955,066,862

      Brooklyn air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality134
      Days with moderate air quality221
      Days w/ poor A.Q. for sensitive groups8
      Days with unhealthy air quality2

      Brooklyn air quality information

      PollutantTotal
      Arsenic0.020%
      Benzene0.070%
      Carbon Tetrachloride0.020%
      Lead0.010%
      Mercury0.010%

      Average monthly Brooklyn temperature with heat index

      Brooklyn monthly precipitation with daily maximum

      Brooklyn monthly snow depth with daily maximum

      Brooklyn monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      East Carondelet, IL523548%
      Bella Villa, MO846548%
      Wilbur Park, MO493548%
      Greendale, MO639548%
      Overland, MO15,932548%
      Brooklyn, IL740548%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Savoy, TX740325550%
      Lake Santee, IN7402844%
      Peletier, NC7403726%
      Magnolia Springs, AL7403726%
      Lake Park, MN7403334%
      Brooklyn, IL740548%
      Source: The Brooklyn, 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.