TODAY FEB27
TEMPERATURE37
HUMIDITY70
PRESSURE29.85
WIND COND.160 13
  • 5037Sat
  • 5325Sun
  • 3819Mon
  • 4432Tue
  • 5031Wed
daynightWeather update from Chicago / West Chicago, Dupage Airport at

Key findings

  • The highest monthly average temperature in Downers Grove for July is 73 degrees
  • The lowest monthly average temperature in Downers Grove for January is 24 degrees
  • The most monthly precipitation in Downers Grove occurs in August with 7.7 inches
  • The air quality index in Downers Grove is 11% worse than the national average
  • The pollution index in Downers Grove is 196% worse than the national average

Compare Downers Grove, IL Weather

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      Downers Grove 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
      January17°F32°F24°F3.1"
      February18°F34°F26°F3.0"
      March31°F49°F39°F5.2"
      April40°F62°F50°F4.8"
      May51°F73°F61°F5.9"
      June60°F82°F70°F6.7"
      July64°F84°F73°F4.1"
      August62°F82°F71°F7.7"
      September55°F76°F65°F3.2"
      October44°F64°F53°F7.3"
      November33°F50°F41°F3.9"
      December22°F36°F29°F3.7"

      Downers Grove 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.
      IndexDowners GroveIllinoisNational
      Air quality index554150
      Pollution index14,981,3003,347,2955,066,862

      Downers Grove 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

      Downers Grove air quality information

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

      Average monthly Downers Grove temperature with heat index

      Downers Grove monthly precipitation with daily maximum

      Downers Grove monthly snow depth with daily maximum

      Downers Grove monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      South Elgin, IL22,2745510%
      St. Charles, IL32,7455510%
      Broadview, IL7,9155510%
      Forest Park, IL14,1375510%
      Bridgeview, IL16,3815510%
      Downers Grove, IL49,5555510%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Wilson, NC49,5583628%
      Logan, UT49,5394412%
      Olympia, WA49,6083040%
      Florin, CA49,486524%
      Galveston, TX49,443524%
      Downers Grove, IL49,5555510%
      Source: The Downers Grove, 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.