TODAY MAR19
TEMPERATURE31
HUMIDITY53
PRESSURE101560
WIND COND.240 22.3
  • 5430Tue
  • 3925Wed
  • 4132Thu50%
  • 4329Fri
  • 4130Sat
daynightWeather update from Chicago, Chicago-O'Hare International Airport at
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Weather Quick Facts

  • The highest monthly average temperature in Oak Brook for July is 76.3 degrees
  • The lowest monthly average temperature in Oak Brook for January is 26.2 degrees
  • The most monthly precipitation in Oak Brook occurs in August with 5.1 inches
  • The air quality index in Oak Brook is 31% worse than the national average
  • The pollution index in Oak Brook is 450% worse than the national average

Compare Oak Brook, IL Weather

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      Oak Brook 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"

      Oak Brook 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.
      IndexOak BrookIllinoisNational
      Air quality index554142
      Pollution index14,981,3003,148,6942,726,193

      Oak Brook 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

      Oak Brook air quality information

      PollutantTotal
      Arsenic0.010%
      Benzene0.140%
      Carbon Tetrachloride0.030%
      Lead0.020%
      Mercury0.010%

      Average monthly Oak Brook temperature with heat index

      Oak Brook monthly precipitation with daily maximum

      Oak Brook monthly snow depth with daily maximum

      Oak Brook monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Lemont, IL17,1315510.0%
      Westmont, IL24,6775510.0%
      Woodridge, IL33,4435510.0%
      Streamwood, IL39,9175510.0%
      Schiller Park, IL11,4995510.0%
      Oak Brook, IL8,0855510.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Ellsworth, ME8,0853138.0%
      Garden City Park, NY8,087512.0%
      Bel Aire, KS8,0824020.0%
      Northfield, NJ8,0883726.0%
      Bellevue, PA8,0885612.0%
      Oak Brook, IL8,0855510.0%
      Source: The Oak Brook, 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.