TODAY DEC15
TEMPERATURE41
HUMIDITY98
PRESSURE30.2
WIND COND.20 6.9
  • 4527Sat
  • 4627Sun
  • 3724Mon
  • 4028Tue
  • 4435Wed
daynightWeather update from Joliet Regional Airport at

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Joliet 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°F34°F25°F2.5"
February19°F36°F27°F2.8"
March31°F50°F39°F4.5"
April41°F63°F51°F4.9"
May50°F73°F61°F4.7"
June60°F83°F71°F5.4"
July64°F85°F74°F5.7"
August62°F83°F72°F6.8"
September55°F77°F65°F5.4"
October44°F64°F53°F5.7"
November33°F51°F41°F4.9"
December23°F37°F30°F3.7"

Did you know?

  • The highest monthly average temperature in Joliet for July is 74 degrees.
  • The lowest monthly average temperature in Joliet for January is 25 degrees.
  • The most monthly precipitation in Joliet occurs in August with 6.8 inches.
  • The air quality index in Joliet is 20% worse than the national average.
  • The pollution index in Joliet is 69% better than the national average.

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Compare Joliet, IL Weather To Other Cities

Joliet 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.
IndexJolietIllinoisNational
Air quality index604150
Pollution index1,558,0703,347,2955,066,862

Joliet 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

Joliet air quality information

PollutantTotal
Arsenic0.010%
Benzene0.010%
Carbon Tetrachloride0.070%
Lead0.090%
Mercury0.010%

Average monthly Joliet temperature with heat index

Joliet monthly precipitation with daily maximum

Joliet monthly snow depth with daily maximum

Joliet monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Montgomery, IL19,055198%
Oswego, IL33,245198%
Elwood, IL2,144198%
Shorewood, IL16,539198%
Wilmington village, IL144198%
Joliet, IL147,5156020%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Torrance, CA147,3077448%
Bridgeport, CT147,022476%
Hollywood, FL148,1144118%
Paterson, NJ146,894536%
Clarksville, TN146,2814118%
Joliet, IL147,5156020%
Source: The Joliet, 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.