Grand Detour, IL Weather - Forecast & Monthly Averages

TEMPERATURE	14
HUMIDITY	78
PRESSURE	102950
WIND COND.	150 5.4

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Weather Quick Facts

The highest monthly average temperature in Grand Detour for July is 71.5 degrees
The lowest monthly average temperature in Grand Detour for January is 21.6 degrees
The most monthly precipitation in Grand Detour occurs in October with 7.1 inches
The air quality index in Grand Detour is equal to the national average
The pollution index in Grand Detour is 23% better than the national average

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Grand Detour 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	14°F	30°F	22°F	3.8"
February	14°F	32°F	23°F	3.4"
March	29°F	48°F	37°F	4.3"
April	39°F	62°F	50°F	4.5"
May	50°F	74°F	61°F	5.4"
June	59°F	81°F	70°F	6.7"
July	61°F	82°F	71°F	6.0"
August	59°F	81°F	69°F	6.4"
September	51°F	76°F	63°F	3.8"
October	41°F	63°F	51°F	7.1"
November	29°F	48°F	38°F	3.9"
December	19°F	34°F	26°F	3.6"

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Grand Detour 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	Grand Detour	Illinois	National
Air quality index	42	41	42
Pollution index	2,097,740	3,148,694	2,726,193

Grand Detour air quality

Measurement	Total
Days measured	341
Days with good air quality	240
Days with moderate air quality	100
Days w/ poor A.Q. for sensitive groups	1
Days with unhealthy air quality	0

Air quality details

Pollutant	Total
Arsenic	0.001%
Benzene	0.060%
Carbon Tetrachloride	0.000%
Lead	0.001%
Mercury	0.300%

Average monthly Grand Detour temperature with heat index

Grand Detour monthly precipitation with daily maximum

Grand Detour monthly snow depth with daily maximum

Grand Detour monthly wind speed information

Nearby cities with good air quality

City	Population	Air Quality Index	National Avg.
West Brooklyn, IL	187	0	100.0%
Amboy, IL	2,453	0	100.0%
Mount Morris, IL	3,182	42	16.0%
Harmon, IL	146	42	16.0%
Polo, IL	2,210	42	16.0%
Grand Detour, IL	351	42	16.0%

Cities with similar population

City	Population	Air Quality Index	National Avg.
Vinegar Bend, AL	351	42	16.0%
Perry, AR	351	45	10.0%
Sacate Village, AZ	351	74	48.0%
Lockwood, CA	351	46	8.0%
Grand View, ID	351	36	28.0%
Grand Detour, IL	351	42	16.0%

Source: The Grand Detour, 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.