TODAY MAR28
TEMPERATURE63
HUMIDITY27
PRESSURE101860
WIND COND.210 25.9
  • 7258Fri20%
  • 7555Sat30%40%
  • 7761Sun40%40%
  • 7551Mon40%70%
  • 6139Tue40%
daynightWeather update from St. Louis Regional Airport at
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Weather Quick Facts

  • The highest monthly average temperature in Maryville for July is 76.5 degrees
  • The lowest monthly average temperature in Maryville for January is 31.2 degrees
  • The most monthly precipitation in Maryville occurs in July with 7.3 inches
  • The air quality index in Maryville is 28% worse than the national average
  • The pollution index in Maryville is 122% worse than the national average

Compare Maryville, IL Weather

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      Maryville 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°F3.4"
      February25°F43°F33°F3.7"
      March38°F57°F46°F3.1"
      April47°F68°F56°F6.6"
      May56°F76°F65°F6.1"
      June65°F85°F75°F3.5"
      July67°F87°F77°F7.3"
      August66°F86°F75°F6.8"
      September58°F80°F68°F4.4"
      October47°F68°F57°F6.7"
      November36°F56°F45°F4.9"
      December28°F43°F35°F6.3"

      Maryville 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.
      IndexMaryvilleIllinoisNational
      Air quality index544142
      Pollution index6,055,6403,148,6942,726,193

      Maryville 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

      Maryville air quality information

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

      Average monthly Maryville temperature with heat index

      Maryville monthly precipitation with daily maximum

      Maryville monthly snow depth with daily maximum

      Maryville monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Alhambra, IL676548.0%
      Edwardsville, IL25,332548.0%
      Marine, IL994548.0%
      St. Jacob, IL1,529548.0%
      Bellefontaine Neighbors, MO10,441548.0%
      Maryville, IL7,962548.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Wendell, NC7,962468.0%
      Fort Frances, ON7,960n/a 
      Inverness, IL7,9595510.0%
      Groesbeck, OH7,959548.0%
      Templeton, CA7,965468.0%
      Maryville, IL7,962548.0%
      Source: The Maryville, 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.