TODAY JUN22
TEMPERATURE86
HUMIDITY57
PRESSURE101250
WIND COND.220 24.1
  • 8365Sun
  • 8570Mon
  • 9471Tue30%
  • 8663Wed
  • 8163Thu
daynightWeather update from Chicago / Wheeling, Pal-Waukee Airport at
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Weather Quick Facts

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

Compare Mount Prospect, IL Weather

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      Mount Prospect 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"

      Mount Prospect 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.
      IndexMount ProspectIllinoisNational
      Air quality index554142
      Pollution index3,795,4103,148,6942,726,193

      Mount Prospect 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

      Mount Prospect air quality information

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

      Average monthly Mount Prospect temperature with heat index

      Mount Prospect monthly precipitation with daily maximum

      Mount Prospect monthly snow depth with daily maximum

      Mount Prospect monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Lake Bluff, IL5,5403922.0%
      Wauconda, IL13,6293922.0%
      Mundelein, IL31,5743922.0%
      Island Lake, IL8,1123922.0%
      Lake Barrington, IL5,0945510.0%
      Mount Prospect, IL54,1655510.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Grapevine, TX54,151512.0%
      Tigard, OR54,1493824.0%
      Colton, CA54,2158978.0%
      Rocky Mount, NC54,3303628.0%
      Decatur, AL54,3444118.0%
      Mount Prospect, IL54,1655510.0%
      Source: The Mount Prospect, 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.