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Key findings

  • The highest monthly average temperature in Cary for July is 74.5 degrees
  • The lowest monthly average temperature in Cary for January is 24.9 degrees
  • The most monthly precipitation in Cary occurs in June with 4.7 inches
  • The air quality index in Cary is 11% worse than the national average
  • The pollution index in Cary is 89% better than the national average

Compare Cary, IL Weather

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      Cary 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
      January18°F33°F25°F1.1"
      February19°F34°F26°F1.4"
      March30°F48°F38°F1.8"
      April39°F60°F49°F2.7"
      May49°F71°F60°F3.6"
      June60°F81°F69°F4.7"
      July65°F85°F74°F4.0"
      August64°F83°F73°F4.4"
      September56°F76°F66°F2.7"
      October45°F64°F54°F3.2"
      November34°F50°F42°F1.7"
      December23°F37°F30°F2.0"

      Cary 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.
      IndexCaryIllinoisNational
      Air quality index554150
      Pollution index543,5163,347,2955,066,862

      Cary 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

      Cary air quality information

      PollutantTotal
      Arsenic0.000%
      Benzene0.004%
      Carbon Tetrachloride0.000%
      Lead0.000%
      Mercury0.000%

      Average monthly Cary temperature with heat index

      Cary monthly precipitation with daily maximum

      Cary monthly snow depth with daily maximum

      Cary monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Greenwood, IL4253726%
      Grayslake, IL21,0533922%
      Libertyville, IL20,4353922%
      Pistakee Highlands, IL3,2633922%
      Wonder Lake, IL3,7393922%
      Cary, IL17,9465510%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Huntington, NY17,9424314%
      Lenoir, NC17,9564314%
      Menasha, WI17,9303726%
      St. Matthews, KY17,930492%
      Logansport, IN17,9243726%
      Cary, IL17,9465510%
      Source: The Cary, 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.