TODAY NOV02
TEMPERATURE47
HUMIDITY71
PRESSURE102950
WIND COND.170 14.8
  • 6459Sun90%
  • 6961Mon100%80%
  • 6848Tue100%
  • 5944Wed
  • 5842Thu
daynightWeather update from Chicago, Chicago-O'Hare International Airport at
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Weather Quick Facts

  • The highest monthly average temperature in Harwood Heights for July is 75 degrees
  • The lowest monthly average temperature in Harwood Heights for January is 24.8 degrees
  • The most monthly precipitation in Harwood Heights occurs in May with 5.4 inches
  • The air quality index in Harwood Heights is 31% worse than the national average
  • The pollution index in Harwood Heights is 39% worse than the national average

Compare Harwood Heights, IL Weather

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      Harwood Heights 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
      January16°F34°F25°F2.3"
      February18°F36°F27°F2.3"
      March29°F49°F39°F2.8"
      April38°F63°F50°F3.9"
      May48°F73°F60°F5.4"
      June59°F83°F71°F4.5"
      July64°F86°F75°F5.2"
      August63°F84°F74°F4.4"
      September56°F78°F66°F3.6"
      October44°F65°F54°F3.4"
      November32°F52°F42°F2.3"
      December21°F38°F29°F2.9"

      Harwood Heights 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.
      IndexHarwood HeightsIllinoisNational
      Air quality index554142
      Pollution index3,795,4103,148,6942,726,193

      Harwood Heights air quality

      MeasurementTotal
      Days measured365
      Days with good air quality121
      Days with moderate air quality227
      Days w/ poor A.Q. for sensitive groups16
      Days with unhealthy air quality1

      Air quality details

      PollutantTotal
      Arsenic0.030%
      Benzene0.050%
      Carbon Tetrachloride0.010%
      Lead0.003%
      Mercury0.310%

      Average monthly Harwood Heights temperature with heat index

      Harwood Heights monthly precipitation with daily maximum

      Harwood Heights monthly snow depth with daily maximum

      Harwood Heights monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Arlington Heights, IL75,0715510.0%
      Brookfield, IL18,5205510.0%
      Forest Park, IL13,8085510.0%
      Addison, IL36,7145510.0%
      Golf, IL5215510.0%
      Harwood Heights, IL8,3935510.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Beaver Falls, PA8,393688.0%
      Kennedale, TX8,393512.0%
      Kalifornsky, AK8,3953138.0%
      Warrenton, MO8,388548.0%
      Torbay, NL8,388n/a 
      Harwood Heights, IL8,3935510.0%
      Source: The Harwood Heights, 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.