TODAY OCT21
TEMPERATURE35
HUMIDITY52
PRESSURE30.3
WIND COND.300 4.7
  • 4935Sun
  • 5935Mon
  • 5231Tue
  • 5134Wed
  • 5037Thu
daynightWeather update from Sterling Rockfalls at
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Sterling 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°F33°F25°F2.9"
February17°F32°F24°F2.5"
March31°F52°F39°F4.5"
April39°F65°F50°F6.4"
May50°F76°F62°F3.5"
June61°F86°F73°F6.1"
July61°F86°F73°F7.8"
August64°F85°F73°F9.2"
September55°F82°F67°F3.9"
October45°F69°F56°F1.9"
November30°F52°F40°F4.2"
December17°F31°F23°F1.5"

Did you know?

  • The highest monthly average temperature in Sterling for August is 73 degrees.
  • The lowest monthly average temperature in Sterling for December is 23 degrees.
  • The most monthly precipitation in Sterling occurs in August with 9.2 inches.
  • The air quality index in Sterling is 6% worse than the national average.
  • The pollution index in Sterling is 58% better than the national average.

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Sterling 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.
IndexSterlingIllinoisNational
Air quality index534150
Pollution index2,097,7403,347,2955,066,862

Sterling air quality information

MeasurementTotal
Days measured365
Days with good air quality158
Days with moderate air quality204
Days w/ poor A.Q. for sensitive groups3
Days with unhealthy air quality

Sterling air quality information

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

Average monthly Sterling temperature with heat index

Sterling monthly precipitation with daily maximum

Sterling monthly snow depth with daily maximum

Sterling monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Dixon, IL14,8023138%
Grand Detour, IL4893138%
Polo, IL2,1313138%
Chadwick, IL581536%
Milledgeville, IL1,052536%
Sterling, IL15,071536%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Clearlake, CA15,0703138%
Cherryland, CA15,066484%
Otsego, MN15,0654412%
Hereford, TX15,0864020%
Newton, IA15,0904118%
Sterling, IL15,071536%
Source: The Sterling, 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.