TODAY NOV21
TEMPERATURE28
HUMIDITY88
PRESSURE30.13
WIND COND.230 10.3
  • 3423Wed
  • 3831
  • 4438Fri80%
  • 4836Sat
  • 4533Sun
daynightWeather update from Rochelle, Rochelle Municipal-Koritz Field Airport at

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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.
MonthTemp. (min)Temp. (max)Temp. (avg)Precipitation
January14°F30°F22°F3.8"
February14°F32°F23°F3.4"
March29°F48°F37°F4.3"
April39°F62°F50°F4.5"
May50°F74°F61°F5.4"
June59°F81°F70°F6.7"
July61°F82°F71°F6.0"
August59°F81°F69°F6.4"
September51°F76°F63°F3.8"
October41°F63°F51°F7.1"
November29°F48°F38°F3.9"
December19°F34°F26°F3.6"

Did you know?

  • The highest monthly average temperature in Grand Detour for July is 71 degrees.
  • The lowest monthly average temperature in Grand Detour for January is 22 degrees.
  • The most monthly precipitation in Grand Detour occurs in October with 7.1 inches.
  • The air quality index in Grand Detour is 37% better than the national average.
  • The pollution index in Grand Detour is 58% better than the national average.

Real Estate Listings In Grand Detour

Compare Grand Detour, IL Weather To Other Cities

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.
IndexGrand DetourIllinoisNational
Air quality index314150
Pollution index2,097,7403,347,2955,066,862

Grand Detour air quality information

MeasurementTotal
Days measured365
Days with good air quality339
Days with moderate air quality26
Days w/ poor A.Q. for sensitive groups
Days with unhealthy air quality

Grand Detour air quality information

PollutantTotal
Arsenic0.001%
Benzene0.060%
Carbon Tetrachloride0.000%
Lead0.001%
Mercury0.300%

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, StatePopulationAir Quality IndexNational Avg.
West Brooklyn, IL167198%
Amboy, IL2,519198%
Ashton, IL1,0083138%
Lost Nation, IL6333138%
Polo, IL2,1313138%
Grand Detour, IL4893138%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Fletcher, OH4894216%
Roseland, IN489512%
Parryville, PA489476%
Isleta Village Proper, NM489512%
Cooper Landing, AK4892942%
Grand Detour, IL4893138%
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.