TODAY JAN20
TEMPERATURE30
HUMIDITY81
PRESSURE30.07
WIND COND.240 14.8
  • 3129Wed
  • 3819Thu
  • 2511Fri
  • 2824Sat
  • 3529Sun
daynightWeather update from Chicago, Chicago-O'Hare International Airport at

Key findings

  • The highest monthly average temperature in O'hare for July is 76 degrees
  • The lowest monthly average temperature in O'hare for January is 26 degrees
  • The most monthly precipitation in O'hare occurs in August with 5.1 inches
  • The air quality index in O'hare is 11% worse than the national average
  • The pollution index in O'hare is 25% better than the national average

Compare Chicago, IL Weather

      vs
      How would you rate the weather in O'hare?
      Write a review to give others more information about this area.
      How would you rate the air quality in O'hare?
      Write a review to give others more information about this area.
      See all O'hare poll results

      O'hare 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
      January20°F34°F26°F1.9"
      February21°F36°F28°F1.6"
      March33°F49°F40°F2.4"
      April42°F62°F51°F3.6"
      May52°F73°F61°F4.3"
      June63°F82°F72°F4.6"
      July68°F86°F76°F3.5"
      August67°F83°F75°F5.1"
      September60°F77°F68°F2.8"
      October48°F65°F55°F3.9"
      November36°F51°F43°F2.2"
      December25°F37°F31°F2.2"

      O'hare 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.
      IndexO'hareChicagoIllinois
      Air quality index555541
      Pollution index3,795,41080,238,7043,347,295

      O'hare 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

      O'hare air quality information

      PollutantTotal
      Arsenic0.760%
      Benzene0.560%
      Carbon Tetrachloride0.280%
      Lead0.480%
      Mercury0.480%

      Average monthly O'hare temperature with heat index

      O'hare monthly precipitation with daily maximum

      O'hare monthly snow depth with daily maximum

      O'hare monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Buffalo Grove, IL41,5545510%
      Bedford Park, IL5815510%
      Cicero, IL83,9725510%
      Oak Park, IL51,9895510%
      Glencoe, IL8,8705510%
      Chicago, IL2,714,0175510%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Houston, TX2,240,582524%
      Philadelphia, PA1,559,938512%
      Phoenix, AZ1,555,3247448%
      Los Angeles, CA3,918,8727244%
      San Antonio, TX1,439,358492%
      Chicago, IL2,714,0175510%
      Source: The O'hare, Chicago, 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.