TODAY MAY27
TEMPERATURE81
HUMIDITY56
PRESSURE29.96
WIND COND.190 5.8
  • 7658Thu60%80%
  • 7149Fri20%
  • 6946Sat
  • 6847Sun
  • 7260Mon
daynightWeather update from Chicago / Wheeling, Pal-Waukee Airport at
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Crystal Lake 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"

Did you know?

  • The highest monthly average temperature in Crystal Lake for July is 74 degrees.
  • The lowest monthly average temperature in Crystal Lake for January is 24 degrees.
  • The most monthly precipitation in Crystal Lake occurs in May with 4.5 inches.
  • The air quality index in Crystal Lake is 38% better than the national average.
  • The pollution index in Crystal Lake is 89% better than the national average.

Compare Crystal Lake, IL Weather To Other Cities

      vs

      Crystal Lake 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.
      IndexCrystal LakeIllinoisNational
      Air quality index314150
      Pollution index543,5163,347,2955,066,862

      Crystal Lake air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality339
      Days with moderate air quality26
      Days w/ poor A.Q. for sensitive groups
      Days with unhealthy air quality

      Crystal Lake air quality information

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

      Average monthly Crystal Lake temperature with heat index

      Crystal Lake monthly precipitation with daily maximum

      Crystal Lake monthly snow depth with daily maximum

      Crystal Lake monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Algonquin, IL30,4133138%
      Burlington, IL6343138%
      Lake in the Hills, IL28,9083138%
      Marengo, IL8,0813138%
      Pingree Grove, IL5,9833138%
      Crystal Lake, IL40,4753138%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Fitchburg, MA40,4413824%
      Warren, OH40,4334510%
      Huntsville, TX40,432524%
      Channelview, TX40,534524%
      Streamwood, IL40,5526020%
      Crystal Lake, IL40,4753138%
      Source: The Crystal Lake, 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.