TODAY MAY19
TEMPERATURE63
HUMIDITY100
PRESSURE30.1
WIND COND.120 11.2
  • 7564Wed40%30%
  • 8266Thu30%30%
  • 8365Fri
  • 8667Sat
  • 8866Sun30%
daynightWeather update from Sterling Rockfalls at

Key findings

  • The highest monthly average temperature in Morrison for August is 73.3 degrees
  • The lowest monthly average temperature in Morrison for December is 23.1 degrees
  • The most monthly precipitation in Morrison occurs in August with 9.2 inches
  • The air quality index in Morrison is 16% better than the national average
  • The pollution index in Morrison is 59% better than the national average

Compare Morrison, IL Weather

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      Morrison 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"

      Morrison 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.
      IndexMorrisonIllinoisNational
      Air quality index424150
      Pollution index2,097,7403,347,2955,066,862

      Morrison air quality information

      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

      Morrison air quality information

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

      Average monthly Morrison temperature with heat index

      Morrison monthly precipitation with daily maximum

      Morrison monthly snow depth with daily maximum

      Morrison monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Deer Grove, IL394216%
      Thomson, IL5634216%
      Lyndon, IL6904216%
      Sterling, IL15,0714216%
      Albany, IL9894216%
      Morrison, IL3,9924216%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Fort Pierce South, FL3,9923628%
      McGehee, AR3,9914314%
      Skyline View, PA3,9934412%
      Washington, GA3,9944412%
      Chelan, WA3,9892452%
      Morrison, IL3,9924216%
      Source: The Morrison, 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.