TODAY MAR01
TEMPERATURE31
HUMIDITY45
PRESSURE30.26
WIND COND.320 14.8
  • 4331Tue
  • 4527Wed
  • 4125Thu
  • 4224Fri
  • 4128Sat
daynightWeather update from Chicago/Waukegan Regional Airport at

Key findings

  • The highest monthly average temperature in Grayslake for July is 72 degrees
  • The lowest monthly average temperature in Grayslake for January is 24 degrees
  • The most monthly precipitation in Grayslake occurs in June with 4.5 inches
  • The air quality index in Grayslake is 22% better than the national average
  • The pollution index in Grayslake is 89% better than the national average

Compare Grayslake, IL Weather

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      Grayslake 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°F33°F25°F1.5"
      March28°F45°F36°F2.6"
      April37°F57°F46°F4.1"
      May47°F68°F57°F3.7"
      June57°F77°F67°F4.5"
      July63°F82°F72°F4.4"
      August62°F80°F71°F3.7"
      September55°F73°F64°F3.3"
      October44°F62°F52°F3.4"
      November33°F49°F40°F2.0"
      December22°F36°F29°F2.5"

      Grayslake 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.
      IndexGrayslakeIllinoisNational
      Air quality index394150
      Pollution index543,5163,347,2955,066,862

      Grayslake air quality information

      MeasurementTotal
      Days measured203
      Days with good air quality174
      Days with moderate air quality28
      Days w/ poor A.Q. for sensitive groups1
      Days with unhealthy air quality0

      Grayslake air quality information

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

      Average monthly Grayslake temperature with heat index

      Grayslake monthly precipitation with daily maximum

      Grayslake monthly snow depth with daily maximum

      Grayslake monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Gages Lake, IL10,0413922%
      Mundelein, IL31,5503922%
      Pistakee Highlands, IL3,2633922%
      Spring Grove, IL5,5783922%
      Twin Lakes, WI6,0593922%
      Grayslake, IL21,0533922%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Ruskin, FL21,0563824%
      Golden Valley, MN21,040468%
      Ferguson, MO21,035548%
      Hays, KS21,0731570%
      Ashland, OR21,0023628%
      Grayslake, IL21,0533922%
      Source: The Grayslake, 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.