TODAY NOV22
TEMPERATURE36
HUMIDITY92
PRESSURE101250
WIND COND.330 11.2
  • 4634Fri
  • 4535Sat
  • 5144Sun
  • 4926Mon
  • 3827Tue
daynightWeather update from Chicago / Wheeling, Pal-Waukee Airport at
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Weather Quick Facts

  • The highest monthly average temperature in Prospect Heights for August is 74.6 degrees
  • The lowest monthly average temperature in Prospect Heights for February is 25.4 degrees
  • The most monthly precipitation in Prospect Heights occurs in August with 12.8 inches
  • The air quality index in Prospect Heights is 31% worse than the national average
  • The pollution index in Prospect Heights is 39% worse than the national average

Compare Prospect Heights, IL Weather

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      Prospect Heights 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
      January21°F34°F27°F4.6"
      February20°F32°F25°F1.8"
      March30°F49°F39°F2.6"
      April39°F60°F49°F4.5"
      May50°F72°F60°F3.5"
      June63°F84°F73°F3.8"
      July65°F84°F74°F5.4"
      August67°F83°F75°F12.8"
      September59°F80°F69°F6.7"
      October49°F66°F57°F1.7"
      November33°F50°F41°F2.4"
      December19°F32°F26°F1.7"

      Prospect Heights 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.
      IndexProspect HeightsIllinoisNational
      Air quality index554142
      Pollution index3,795,4103,148,6942,726,193

      Prospect Heights air quality

      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

      Air quality details

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

      Average monthly Prospect Heights temperature with heat index

      Prospect Heights monthly precipitation with daily maximum

      Prospect Heights monthly snow depth with daily maximum

      Prospect Heights monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      North Chicago, IL29,9673922.0%
      Green Oaks, IL3,8823922.0%
      Island Lake, IL8,1123922.0%
      Knollwood, IL1,6843922.0%
      Mundelein, IL31,5743922.0%
      Prospect Heights, IL15,9865510.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Summerside, PE15,987n/a 
      Floral Park, NY15,979512.0%
      Rossville, MD15,993468.0%
      White Center, WA15,9954510.0%
      Cherryland, CA15,9764314.0%
      Prospect Heights, IL15,9865510.0%
      Source: The Prospect Heights, 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.