TODAY DEC19
TEMPERATURE34
HUMIDITY88
PRESSURE30.06
WIND COND.190 8.1
  • 4539Wed
  • 4330Thu50%30%
  • 3525Fri
  • 3625Sat
  • 3523Sun
daynightWeather update from Lewis University Airport at

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Romeoville 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
January17°F32°F24°F3.1"
February18°F34°F26°F3.0"
March31°F49°F39°F5.2"
April40°F62°F50°F4.8"
May51°F73°F61°F5.9"
June60°F82°F70°F6.7"
July64°F84°F73°F4.1"
August62°F82°F71°F7.7"
September55°F76°F65°F3.2"
October44°F64°F53°F7.3"
November33°F50°F41°F3.9"
December22°F36°F29°F3.7"

Did you know?

  • The highest monthly average temperature in Romeoville for July is 73 degrees.
  • The lowest monthly average temperature in Romeoville for January is 24 degrees.
  • The most monthly precipitation in Romeoville occurs in August with 7.7 inches.
  • The air quality index in Romeoville is 20% worse than the national average.
  • The pollution index in Romeoville is 195% worse than the national average.

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Compare Romeoville, IL Weather To Other Cities

Romeoville 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.
IndexRomeovilleIllinoisNational
Air quality index604150
Pollution index14,981,3003,347,2955,066,862

Romeoville 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

Romeoville air quality information

PollutantTotal
Arsenic0.010%
Benzene0.140%
Carbon Tetrachloride0.030%
Lead0.020%
Mercury0.010%

Average monthly Romeoville temperature with heat index

Romeoville monthly precipitation with daily maximum

Romeoville monthly snow depth with daily maximum

Romeoville monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Channahon, IL12,329198%
Oswego, IL33,245198%
Plattville, IL254198%
Shorewood, IL16,539198%
Minooka, IL11,786198%
Romeoville, IL39,7396020%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Calexico, CA39,750476%
Odenton, MD39,759468%
Woodlawn, MD39,685468%
Maplewood, MN39,6784412%
La Quinta, CA39,8018570%
Romeoville, IL39,7396020%
Source: The Romeoville, 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.