TODAY FEB28
TEMPERATURE55
HUMIDITY100
PRESSURE29.81
WIND COND.
  • 5027Mon
  • 4731Tue20%
  • 5735Wed
  • 5937Thu
  • 5332Fri
daynightWeather update from St. Louis Downtown Airport at

Key findings

  • The highest monthly average temperature in Trenton for August is 80 degrees
  • The lowest monthly average temperature in Trenton for December is 33 degrees
  • The most monthly precipitation in Trenton occurs in September with 16.1 inches
  • The air quality index in Trenton is 9% worse than the national average
  • The pollution index in Trenton is 87% better than the national average

Compare Trenton, IL Weather

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      Trenton 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
      January28°F43°F34°F9.8"
      February26°F45°F34°F4.7"
      March38°F60°F48°F2.9"
      April45°F68°F56°F5.6"
      May56°F79°F67°F3.7"
      June65°F88°F76°F7.6"
      July67°F88°F77°F12.3"
      August70°F93°F80°F7.2"
      September61°F85°F72°F16.1"
      October49°F72°F59°F7.5"
      November38°F59°F47°F11.9"
      December27°F42°F33°F2.9"

      Trenton 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.
      IndexTrentonIllinoisNational
      Air quality index544150
      Pollution index647,2803,347,2955,066,862

      Trenton air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality134
      Days with moderate air quality221
      Days w/ poor A.Q. for sensitive groups8
      Days with unhealthy air quality2

      Trenton air quality information

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

      Average monthly Trenton temperature with heat index

      Trenton monthly precipitation with daily maximum

      Trenton monthly snow depth with daily maximum

      Trenton monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Bartelso, IL6194314%
      Germantown, IL1,1594314%
      Okawville, IL1,6204314%
      Beckemeyer, IL9814314%
      Breese, IL4,5904314%
      Trenton, IL2,680548%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Dennis Port, MA2,6803628%
      Provincetown, MA2,6803628%
      Black Canyon City, AZ2,6817448%
      Clinton, NJ2,6793432%
      Lake Helen, FL2,6783726%
      Trenton, IL2,680548%
      Source: The Trenton, 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.