TODAY NOV21
TEMPERATURE31
HUMIDITY78
PRESSURE100370
WIND COND.270 20.5
  • 4632Fri
  • 4433Sat
  • 4940Sun
  • 4726Mon
  • 3723Tue
daynightWeather update from Chicago/Waukegan Regional Airport at
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Weather Quick Facts

  • The highest monthly average temperature in Round Lake Beach for July is 72 degrees
  • The lowest monthly average temperature in Round Lake Beach for January is 23.8 degrees
  • The most monthly precipitation in Round Lake Beach occurs in June with 4.5 inches
  • The air quality index in Round Lake Beach is 7% better than the national average
  • The pollution index in Round Lake Beach is 80% better than the national average

Compare Round Lake Beach, IL Weather

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      Round Lake Beach 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"

      Round Lake Beach 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.
      IndexRound Lake BeachIllinoisNational
      Air quality index394142
      Pollution index543,5163,148,6942,726,193

      Round Lake Beach air quality

      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

      Air quality details

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

      Average monthly Round Lake Beach temperature with heat index

      Round Lake Beach monthly precipitation with daily maximum

      Round Lake Beach monthly snow depth with daily maximum

      Round Lake Beach monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Lake Ivanhoe, WI3983726.0%
      Grayslake, IL20,4823922.0%
      Libertyville, IL20,3003922.0%
      Third Lake, IL1,1603922.0%
      Pistakee Highlands, IL3,3023922.0%
      Round Lake Beach, IL27,3133922.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Bixby, OK27,3154510.0%
      Citrus Park, FL27,3334314.0%
      Imperial Beach, CA27,3346428.0%
      Easton, PA27,2744216.0%
      Lake Jackson, TX27,269524.0%
      Round Lake Beach, IL27,3133922.0%
      Source: The Round Lake Beach, 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.