TODAY MAY17
TEMPERATURE67
HUMIDITY49
PRESSURE30.12
WIND COND.100 13
  • 6858Mon40%30%
  • 6861Tue40%50%
  • 8066Wed40%20%
  • 8467Thu
  • 8667Fri
daynightWeather update from Chicago, Chicago-O'Hare International Airport at

Key findings

  • 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 11% worse than the national average
  • The pollution index in Harwood Heights is 25% better 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 index554150
      Pollution index3,795,4103,347,2955,066,862

      Harwood Heights air quality information

      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

      Harwood Heights air quality information

      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

      City, StatePopulationAir Quality IndexNational Avg.
      Arlington Heights, IL75,7215510%
      Brookfield, IL18,9665510%
      Forest Park, IL14,1375510%
      Addison, IL37,1925510%
      Golf, IL5335510%
      Harwood Heights, IL8,6285510%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Rapid Valley, SD8,6294412%
      Angola, IN8,6244510%
      Zuni Pueblo, NM8,6351766%
      Incline Village, NV8,6214118%
      East Grand Forks, MN8,6363334%
      Harwood Heights, IL8,6285510%
      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.