TODAY MAY09
TEMPERATURE61
HUMIDITY81
PRESSURE29.48
WIND COND.170 16.6
  • 6340Sun90%
  • 6244Mon
  • 6242Tue
  • 6344Wed
  • 6645Thu
daynightWeather update from St. Louis Downtown Airport at

Key findings

  • The highest monthly average temperature in Mascoutah for August is 80 degrees
  • The lowest monthly average temperature in Mascoutah for December is 33.3 degrees
  • The most monthly precipitation in Mascoutah occurs in September with 16.1 inches
  • The air quality index in Mascoutah is 9% worse than the national average
  • The pollution index in Mascoutah is 20% worse than the national average

Compare Mascoutah, IL Weather

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      Mascoutah 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"

      Mascoutah 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.
      IndexMascoutahIllinoisNational
      Air quality index544150
      Pollution index6,055,6403,347,2955,066,862

      Mascoutah 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

      Mascoutah air quality information

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

      Average monthly Mascoutah temperature with heat index

      Mascoutah monthly precipitation with daily maximum

      Mascoutah monthly snow depth with daily maximum

      Mascoutah monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Breese, IL4,5904314%
      Okawville, IL1,6204314%
      Germantown, IL1,1594314%
      Caseyville, IL4,263548%
      Summerfield, IL497548%
      Mascoutah, IL7,917548%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Donaldsonville, LA7,9164510%
      Lake Norman of Catawba, NC7,9183628%
      Conshohocken, PA7,916512%
      Monona, WI7,9193922%
      Ellwood City, PA7,9153138%
      Mascoutah, IL7,917548%
      Source: The Mascoutah, 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.