TODAY MAR02
TEMPERATURE43
HUMIDITY57
PRESSURE30.03
WIND COND.220 20.5
  • 4730Wed
  • 4028Thu
  • 4328Fri
  • 4632Sat
  • 5439Sun
daynightWeather update from Chicago, Chicago-O'Hare International Airport at

Key findings

  • The highest monthly average temperature in Rosemont for July is 75 degrees
  • The lowest monthly average temperature in Rosemont for January is 25 degrees
  • The most monthly precipitation in Rosemont occurs in May with 5.4 inches
  • The air quality index in Rosemont is 11% worse than the national average
  • The pollution index in Rosemont is 25% better than the national average

Compare Rosemont, IL Weather

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      Rosemont 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"

      Rosemont 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.
      IndexRosemontIllinoisNational
      Air quality index554150
      Pollution index3,795,4103,347,2955,066,862

      Rosemont 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

      Rosemont air quality information

      PollutantTotal
      Arsenic0.030%
      Benzene0.050%
      Carbon Tetrachloride0.010%
      Lead0.003%
      Mercury0.310%

      Average monthly Rosemont temperature with heat index

      Rosemont monthly precipitation with daily maximum

      Rosemont monthly snow depth with daily maximum

      Rosemont monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Norridge, IL15,0235510%
      River Forest, IL11,2175510%
      Mount Prospect, IL54,5525510%
      Buffalo Grove, IL41,5545510%
      Rolling Meadows, IL23,3775510%
      Rosemont, IL4,7155510%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Flourtown, PA4,715512%
      Mount Pleasant, TN4,7153138%
      East Quogue, NY4,7144118%
      Emerald Lake Hills, CA4,7164314%
      New Roads, LA4,7164510%
      Rosemont, IL4,7155510%
      Source: The Rosemont, 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.