TODAY MAY14
TEMPERATURE44
HUMIDITY62
PRESSURE30.31
WIND COND.
  • 7048
  • 6451Sat40%40%
  • 7252Sun20%20%
  • 7352Mon30%
  • 7856Tue
daynightWeather update from Chicago / West Chicago, Dupage Airport at

Key findings

  • The highest monthly average temperature in Algonquin for July is 73.7 degrees
  • The lowest monthly average temperature in Algonquin for January is 23.8 degrees
  • The most monthly precipitation in Algonquin occurs in May with 4.5 inches
  • The air quality index in Algonquin is 16% better than the national average
  • The pollution index in Algonquin is 89% better than the national average

Compare Algonquin, IL Weather

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      Algonquin 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°F32°F24°F1.4"
      February17°F34°F25°F1.2"
      March30°F49°F38°F2.2"
      April39°F62°F50°F3.8"
      May49°F73°F60°F4.5"
      June59°F82°F70°F4.4"
      July63°F85°F74°F4.1"
      August62°F83°F72°F3.8"
      September54°F77°F65°F3.4"
      October43°F64°F53°F3.1"
      November32°F50°F40°F1.9"
      December21°F36°F29°F2.1"

      Algonquin 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.
      IndexAlgonquinIllinoisNational
      Air quality index424150
      Pollution index543,5163,347,2955,066,862

      Algonquin air quality information

      MeasurementTotal
      Days measured341
      Days with good air quality240
      Days with moderate air quality100
      Days w/ poor A.Q. for sensitive groups1
      Days with unhealthy air quality0

      Algonquin air quality information

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

      Average monthly Algonquin temperature with heat index

      Algonquin monthly precipitation with daily maximum

      Algonquin monthly snow depth with daily maximum

      Algonquin monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Holiday Hills, IL6983922%
      Oakwood Hills, IL2,1153922%
      Island Lake, IL8,0253922%
      Grayslake, IL21,0533922%
      Prairie Grove, IL1,7043922%
      Algonquin, IL30,4134216%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Aiken, SC30,403476%
      Ballwin, MO30,431548%
      Westfield, NJ30,438512%
      Manchester, CT30,3644118%
      Morgantown, WV30,3643628%
      Algonquin, IL30,4134216%
      Source: The Algonquin, 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.