TODAY DEC14
TEMPERATURE33
HUMIDITY82
PRESSURE29.72
WIND COND.300 11.4
  • 2822Sun20%
  • 3218Mon50%40%
  • 2811Tue
  • 2418Wed
  • 3627Thu
daynightWeather update from Chicago / Wheeling, Pal-Waukee Airport at
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Lake Forest 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
January18°F33°F25°F4.0"
February13°F30°F22°F3.3"
March25°F45°F35°F3.0"
April35°F60°F48°F2.7"
May43°F71°F57°F3.9"
June55°F83°F70°F5.1"
July56°F83°F71°F4.4"
August59°F83°F71°F3.9"
September49°F78°F63°F1.9"
October42°F66°F54°F2.3"
November28°F49°F39°F5.0"
December19°F32°F26°F3.5"

Did you know?

  • The highest monthly average temperature in Lake Forest for August is 71 degrees.
  • The lowest monthly average temperature in Lake Forest for February is 22 degrees.
  • The most monthly precipitation in Lake Forest occurs in June with 5.1 inches.
  • The air quality index in Lake Forest is 21% worse than the national average.
  • The pollution index in Lake Forest is 25% better than the national average.

Compare Lake Forest, IL Weather To Other Cities

Lake Forest 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.
IndexLake ForestIllinoisNational
Air quality index604150
Pollution index3,795,4103,347,2955,066,862

Lake Forest air quality information

MeasurementTotal
Days measured365
Days with good air quality72
Days with moderate air quality281
Days w/ poor A.Q. for sensitive groups11
Days with unhealthy air quality1

Lake Forest air quality information

PollutantTotal
Arsenic0.030%
Benzene0.050%
Carbon Tetrachloride0.010%
Lead0.003%
Mercury0.310%

Average monthly Lake Forest temperature with heat index

Lake Forest monthly precipitation with daily maximum

Lake Forest monthly snow depth with daily maximum

Lake Forest monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Grayslake, IL21,0533530%
Knollwood, IL1,7293530%
Libertyville, IL20,4353530%
Long Lake, IL3,5643530%
Mundelein, IL31,5503530%
Lake Forest, IL18,8816020%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Sylvania, OH18,8823628%
Mayfield Heights, OH18,8785510%
Oroville, CA18,884468%
Niles, OH18,8774510%
Brook Park, OH18,8755510%
Lake Forest, IL18,8816020%
Source: The Lake Forest, 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.
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