TODAY JUN18
TEMPERATURE92
HUMIDITY56
PRESSURE29.9
WIND COND.240 15
  • 8265Tue50%60%
  • 7762Wed50%30%
  • 7662Thu30%50%
  • 7463Fri60%60%
  • 7662Sat30%
daynightWeather update from Sterling Rockfalls at

Rock Falls Average Weather

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
January-24°F64°F26°F0.7"
February-15°F59°F25°F0.6"
March7°F79°F37°F1.7"
April19°F84°F51°F1.9"
May23°F91°F61°F2.1"
June46°F97°F71°F2.0"
July46°F102°F73°F2.8"
August48°F99°F72°F2.3"
September34°F93°F65°F1.9"
October21°F90°F53°F0.5"
November10°F75°F41°F2.0"
December-11°F55°F26°F0.4"

Did you know?

  • The highest monthly average temperature in Rock Falls for July is 73 degrees.
  • The lowest monthly average temperature in Rock Falls for February is 25 degrees.
  • The most monthly precipitation in Rock Falls occurs in July with 2.8 inches.
  • The air quality index in Rock Falls is 6% worse than the national average.
  • The pollution index in Rock Falls is 58% better than the national average.

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Compare Rock Falls, IL Weather To Other Cities

Rock Falls 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.
IndexRock FallsIllinoisNational
Air quality index534150
Pollution index2,097,7403,347,2955,066,862

Rock Falls 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

Rock Falls air quality information

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

Average monthly Rock Falls temperature with heat index

Rock Falls monthly precipitation with daily maximum

Rock Falls monthly snow depth with daily maximum

Rock Falls monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Ohio, IL470198%
Dixon, IL14,8023138%
Polo, IL2,1313138%
Grand Detour, IL4893138%
Como, IL408536%
Rock Falls, IL9,104536%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
New Baltimore, VA9,0973726%
Grinnell, IA9,1124118%
Rawlins, WY9,1143922%
Triangle, VA9,092492%
Frankfort Square, IL9,1166020%
Rock Falls, IL9,104536%
Source: The Rock Falls, 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.