TODAY FEB25
TEMPERATURE37
HUMIDITY78
PRESSURE30.3
WIND COND.350 16.6
  • 4729Thu
  • 5036Fri30%
  • 5942Sat20%
  • 5633Sun30%
  • 4828Mon20%
daynightWeather update from St. Louis Downtown Airport at

Key findings

  • The highest monthly average temperature in Belleville for July is 78 degrees
  • The lowest monthly average temperature in Belleville for January is 32 degrees
  • The most monthly precipitation in Belleville occurs in April with 10.2 inches
  • The air quality index in Belleville is 9% worse than the national average
  • The pollution index in Belleville is 20% worse than the national average

Compare Belleville, IL Weather

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      Belleville 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
      January23°F42°F32°F5.6"
      February25°F45°F34°F3.8"
      March37°F59°F47°F7.1"
      April47°F70°F57°F10.2"
      May56°F77°F66°F8.9"
      June65°F87°F76°F9.2"
      July68°F89°F78°F8.0"
      August66°F88°F76°F7.8"
      September58°F82°F69°F8.4"
      October47°F70°F57°F8.6"
      November36°F57°F46°F6.9"
      December28°F45°F36°F8.2"

      Belleville 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.
      IndexBellevilleIllinoisNational
      Air quality index544150
      Pollution index6,055,6403,347,2955,066,862

      Belleville 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

      Belleville air quality information

      PollutantTotal
      Arsenic0.010%
      Benzene0.070%
      Carbon Tetrachloride0.040%
      Lead0.100%
      Mercury0.230%

      Average monthly Belleville temperature with heat index

      Belleville monthly precipitation with daily maximum

      Belleville monthly snow depth with daily maximum

      Belleville monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Troy, IL10,041548%
      Millstadt, IL3,911548%
      Mascoutah, IL7,917548%
      East Carondelet, IL523548%
      Collinsville, IL24,855548%
      Belleville, IL42,729548%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      San Bruno, CA42,7364314%
      Salem, MA42,8044314%
      Bell Gardens, CA42,8057244%
      Moline, IL42,805468%
      Fairfield, OH42,640548%
      Belleville, IL42,729548%
      Source: The Belleville, 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.