TODAY MAY07
TEMPERATURE67
HUMIDITY38
PRESSURE30.04
WIND COND.250 18.4
  • 5851Sat70%
  • 6545Sun100%80%
  • 6142Mon
  • 6243Tue
  • 6346Wed
daynightWeather update from Olney-Noble Airport at

Key findings

  • The highest monthly average temperature in Olney for July is 77.1 degrees
  • The lowest monthly average temperature in Olney for January is 31.5 degrees
  • The most monthly precipitation in Olney occurs in September with 8.8 inches
  • The air quality index in Olney is 28% better than the national average
  • The pollution index in Olney is 90% better than the national average

Compare Olney, IL Weather

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      Olney 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
      January24°F41°F31°F5.3"
      February26°F43°F33°F3.7"
      March38°F57°F46°F4.5"
      April47°F69°F57°F8.3"
      May56°F77°F66°F6.2"
      June65°F86°F75°F8.8"
      July67°F88°F77°F7.5"
      August65°F87°F75°F7.1"
      September58°F81°F68°F8.8"
      October47°F70°F57°F6.4"
      November36°F57°F45°F7.2"
      December29°F45°F36°F5.8"

      Olney 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.
      IndexOlneyIllinoisNational
      Air quality index364150
      Pollution index500,0043,347,2955,066,862

      Olney air quality information

      MeasurementTotal
      Days measured359
      Days with good air quality328
      Days with moderate air quality31
      Days w/ poor A.Q. for sensitive groups0
      Days with unhealthy air quality0

      Olney air quality information

      PollutantTotal
      Arsenic0.001%
      Benzene0.020%
      Carbon Tetrachloride0.000%
      Lead0.000%
      Mercury0.000%

      Average monthly Olney temperature with heat index

      Olney monthly precipitation with daily maximum

      Olney monthly snow depth with daily maximum

      Olney monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      West Salem, IL8583628%
      Calhoun, IL1843628%
      Claremont, IL2723628%
      Parkersburg, IL1463628%
      Sumner, IL5,0943628%
      Olney, IL8,9313628%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Derby, CO8,9305816%
      Canonsburg, PA8,9335612%
      Makaha, HI8,9343040%
      Liberty, TX8,9364510%
      Madeira, OH8,924548%
      Olney, IL8,9313628%
      Source: The Olney, 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.