TODAY MAY30
TEMPERATURE
HUMIDITY
PRESSURE
WIND COND.
  • 7253Sun
  • 7664Mon
  • 8870Tue
  • 8867Wed40%
  • 8567Thu
daynightWeather update from Logan County Airport at
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McLean 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
January20°F37°F28°F2.6"
February21°F39°F29°F3.2"
March34°F55°F43°F4.1"
April44°F67°F55°F6.7"
May54°F76°F65°F4.6"
June63°F85°F74°F8.5"
July66°F87°F76°F11.2"
August64°F86°F74°F8.1"
September56°F80°F67°F11.5"
October46°F68°F56°F6.3"
November34°F54°F43°F5.1"
December25°F40°F32°F5.3"

Did you know?

  • The highest monthly average temperature in McLean for July is 76 degrees.
  • The lowest monthly average temperature in McLean for January is 28 degrees.
  • The most monthly precipitation in McLean occurs in September with 11.5 inches.
  • The air quality index in McLean is 28% better than the national average.
  • The pollution index in McLean is 88% better than the national average.

Compare McLean, IL Weather To Other Cities

      vs

      McLean 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.
      IndexMcLeanIllinoisNational
      Air quality index364150
      Pollution index607,2623,347,2955,066,862

      McLean air quality information

      MeasurementTotal
      Days measured362
      Days with good air quality309
      Days with moderate air quality53
      Days w/ poor A.Q. for sensitive groups
      Days with unhealthy air quality

      McLean air quality information

      PollutantTotal
      Arsenic0.001%
      Benzene0.030%
      Carbon Tetrachloride0.001%
      Lead0.000%
      Mercury0.000%

      Average monthly McLean temperature with heat index

      McLean monthly precipitation with daily maximum

      McLean monthly snow depth with daily maximum

      McLean monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Lincoln, IL14,2533530%
      Downs, IL9713628%
      Twin Grove, IL1,9293628%
      Bloomington, IL78,3683628%
      Hartsburg, IL2513628%
      McLean, IL7793628%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Trimont, MN7793530%
      West Point, IN779524%
      Pine Harbor, TX7793922%
      Howard, KS7793922%
      Ravine, PA7794314%
      McLean, IL7793628%
      Source: The McLean, 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.