Northbrook, IL Weather - Forecast & Monthly Averages

TEMPERATURE	37
HUMIDITY	85
PRESSURE	101050
WIND COND.	340 22.3

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Weather Quick Facts

The highest monthly average temperature in Northbrook for August is 74.6 degrees
The lowest monthly average temperature in Northbrook for February is 25.4 degrees
The most monthly precipitation in Northbrook occurs in August with 12.8 inches
The air quality index in Northbrook is 31% worse than the national average
The pollution index in Northbrook is 39% worse than the national average

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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.
Month	Temp. _(min)	Temp. _(max)	Temp. _(avg)	Precipitation
January	21°F	34°F	27°F	4.6"
February	20°F	32°F	25°F	1.8"
March	30°F	49°F	39°F	2.6"
April	39°F	60°F	49°F	4.5"
May	50°F	72°F	60°F	3.5"
June	63°F	84°F	73°F	3.8"
July	65°F	84°F	74°F	5.4"
August	67°F	83°F	75°F	12.8"
September	59°F	80°F	69°F	6.7"
October	49°F	66°F	57°F	1.7"
November	33°F	50°F	41°F	2.4"
December	19°F	32°F	26°F	1.7"

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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.
Index	Northbrook	Illinois	National
Air quality index	55	41	42
Pollution index	3,795,410	3,148,694	2,726,193

Northbrook air quality

Measurement	Total
Days measured	365
Days with good air quality	121
Days with moderate air quality	227
Days w/ poor A.Q. for sensitive groups	16
Days with unhealthy air quality	1

Air quality details

Pollutant	Total
Arsenic	0.030%
Benzene	0.050%
Carbon Tetrachloride	0.010%
Lead	0.003%
Mercury	0.310%

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	Population	Air Quality Index	National Avg.
Mundelein, IL	31,574	39	22.0%
Lake Bluff, IL	5,540	39	22.0%
Hainesville, IL	3,595	39	22.0%
Round Lake, IL	18,235	39	22.0%
Grayslake, IL	20,482	39	22.0%
Northbrook, IL	33,216	55	10.0%

Cities with similar population

City	Population	Air Quality Index	National Avg.
Prairieville, LA	33,228	45	10.0%
Springville, UT	33,251	46	8.0%
Hinesville, GA	33,304	39	22.0%
Lexington, MA	33,304	43	14.0%
Holland, MI	33,329	38	24.0%
Northbrook, IL	33,216	55	10.0%

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.