TODAY DEC13
TEMPERATURE26
HUMIDITY46
PRESSURE103560
WIND COND.100 16.6
  • 3737Sat40%100%
  • 4437Sun
  • 4827Mon30%
  • 3725Tue
  • 3317Wed
daynightWeather update from Clinton Municipal Airport at
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Weather Quick Facts

  • The highest monthly average temperature in Rock Falls for August is 73.3 degrees
  • The lowest monthly average temperature in Rock Falls for December is 23.1 degrees
  • The most monthly precipitation in Rock Falls occurs in August with 9.2 inches
  • The air quality index in Rock Falls is equal to the national average
  • The pollution index in Rock Falls is 23% better than the national average

Compare Rock Falls, IL Weather

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      Rock Falls 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"

      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 index424142
      Pollution index2,097,7403,148,6942,726,193

      Rock Falls air quality

      MeasurementTotal
      Days measured364
      Days with good air quality268
      Days with moderate air quality96
      Days w/ poor A.Q. for sensitive groups0
      Days with unhealthy air quality0

      Air quality details

      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

      CityPopulationAir Quality IndexNational Avg.
      Ohio, IL5090100.0%
      Walnut, IL1,3404216.0%
      Grand Detour, IL3514216.0%
      Morrison, IL3,8504216.0%
      Sterling, IL14,7744216.0%
      Rock Falls, IL8,9144216.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Mahopac, NY8,9143628.0%
      Berkeley, MO8,912548.0%
      Monmouth Junction, NJ8,9114118.0%
      Terrace Heights, WA8,9173824.0%
      Alma, MI8,9182648.0%
      Rock Falls, IL8,9144216.0%
      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.