TODAY MAY18
TEMPERATURE65
HUMIDITY95
PRESSURE30.12
WIND COND.
  • 7463Tue80%40%
  • 8164Wed30%20%
  • 8364Thu20%
  • 8465Fri
  • 8666Sat20%
daynightWeather update from Salem, Salem-Leckrone Airport at

Key findings

  • The highest monthly average temperature in Vernon for July is 77.6 degrees
  • The lowest monthly average temperature in Vernon for January is 32.3 degrees
  • The most monthly precipitation in Vernon occurs in September with 8.9 inches
  • The air quality index in Vernon is 14% better than the national average
  • The pollution index in Vernon is 87% better than the national average

Compare Vernon, IL Weather

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      Vernon 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
      January25°F41°F32°F3.5"
      February27°F44°F34°F2.0"
      March39°F58°F47°F3.7"
      April48°F69°F58°F7.8"
      May57°F77°F66°F5.4"
      June66°F86°F76°F8.3"
      July68°F88°F78°F7.4"
      August66°F87°F76°F7.2"
      September59°F81°F69°F8.9"
      October48°F70°F58°F5.6"
      November38°F57°F47°F4.2"
      December30°F45°F37°F4.9"

      Vernon 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.
      IndexVernonIllinoisNational
      Air quality index434150
      Pollution index647,2803,347,2955,066,862

      Vernon air quality information

      MeasurementTotal
      Days measured344
      Days with good air quality269
      Days with moderate air quality74
      Days w/ poor A.Q. for sensitive groups1
      Days with unhealthy air quality0

      Vernon air quality information

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

      Average monthly Vernon temperature with heat index

      Vernon monthly precipitation with daily maximum

      Vernon monthly snow depth with daily maximum

      Vernon monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Smithboro, IL1714020%
      Kinmundy, IL1,0074020%
      Brownstown, IL7104020%
      St. Peter, IL3884020%
      Mulberry Grove, IL6704020%
      Vernon, IL1114314%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Oto, IA1113530%
      Cokedale, CO1111570%
      Brooklyn Heights, MO1113726%
      Struble, IA1113530%
      Volant, PA1113138%
      Vernon, IL1114314%
      Source: The Vernon, 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.