TODAY OCT21
TEMPERATURE30
HUMIDITY66
PRESSURE30.37
WIND COND.300 6.9
  • 4935Sun
  • 5836Mon
  • 5033Tue
  • 4834Wed
  • 4936Thu
daynightWeather update from Chicago / Wheeling, Pal-Waukee Airport at
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Forest 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
January18°F33°F25°F1.1"
February19°F34°F26°F1.4"
March30°F48°F38°F1.8"
April39°F60°F49°F2.7"
May49°F71°F60°F3.6"
June60°F81°F69°F4.7"
July65°F85°F74°F4.0"
August64°F83°F73°F4.4"
September56°F76°F66°F2.7"
October45°F64°F54°F3.2"
November34°F50°F42°F1.7"
December23°F37°F30°F2.0"

Did you know?

  • The highest monthly average temperature in Forest Lake for July is 74 degrees.
  • The lowest monthly average temperature in Forest Lake for January is 25 degrees.
  • The most monthly precipitation in Forest Lake occurs in June with 4.7 inches.
  • The air quality index in Forest Lake is 20% worse than the national average.
  • The pollution index in Forest Lake is 89% better than the national average.

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Forest 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.
IndexForest LakeIllinoisNational
Air quality index604150
Pollution index543,5163,347,2955,066,862

Forest Lake 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

Forest Lake air quality information

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

Average monthly Forest Lake temperature with heat index

Forest Lake monthly precipitation with daily maximum

Forest Lake monthly snow depth with daily maximum

Forest Lake monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Algonquin, IL30,4133138%
Crystal Lake, IL40,4753138%
Lake in the Hills, IL28,9083138%
Fox Lake, IL10,4343530%
Grayslake, IL21,0533530%
Forest Lake, IL1,7436020%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Clearwater, MN1,7433334%
Williamsport, IN1,743524%
Sparta, GA1,7434118%
Glen Lyon, PA1,7434020%
Sharon, WI1,7443824%
Forest Lake, IL1,7436020%
Source: The Forest 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.