TODAY DEC17
TEMPERATURE39
HUMIDITY62
PRESSURE30.09
WIND COND.280 5.8
  • 3624Mon
  • 4031Tue
  • 4438Wed20%
  • 4333Thu
  • 3727Fri
daynightWeather update from Chicago / Wheeling, Pal-Waukee Airport at

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Northbrook 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
January21°F34°F27°F4.6"
February20°F32°F25°F1.8"
March30°F49°F39°F2.6"
April39°F60°F49°F4.5"
May50°F72°F60°F3.5"
June63°F84°F73°F3.8"
July65°F84°F74°F5.4"
August67°F83°F75°F12.8"
September59°F80°F69°F6.7"
October49°F66°F57°F1.7"
November33°F50°F41°F2.4"
December19°F32°F26°F1.7"

Did you know?

  • The highest monthly average temperature in Northbrook for August is 75 degrees.
  • The lowest monthly average temperature in Northbrook for February is 25 degrees.
  • The most monthly precipitation in Northbrook occurs in August with 12.8 inches.
  • The air quality index in Northbrook is 20% worse than the national average.
  • The pollution index in Northbrook is 25% better than the national average.

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Compare Northbrook, IL Weather To Other Cities

Northbrook 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.
IndexNorthbrookIllinoisNational
Air quality index604150
Pollution index3,795,4103,347,2955,066,862

Northbrook 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

Northbrook air quality information

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

Average monthly Northbrook temperature with heat index

Northbrook monthly precipitation with daily maximum

Northbrook monthly snow depth with daily maximum

Northbrook monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Grayslake, IL21,0533530%
Knollwood, IL1,7293530%
Libertyville, IL20,4353530%
Green Oaks, IL3,8323530%
Lake Bluff, IL5,7583530%
Northbrook, IL33,5386020%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Randolph, MA33,526476%
Deer Park, TX33,517524%
Holland, MI33,5812942%
Richmond, KY33,5833334%
Fairborn, OH33,487484%
Northbrook, IL33,5386020%
Source: The Northbrook, 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.