TODAY NOV22
TEMPERATURE37
HUMIDITY96
PRESSURE101290
WIND COND.310 5.4
  • 4533Fri
  • 4433Sat
  • 5144Sun
  • 5024Mon
  • 3726Tue
daynightWeather update from Joliet Regional Airport at
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Weather Quick Facts

  • The highest monthly average temperature in Symerton for July is 74.2 degrees
  • The lowest monthly average temperature in Symerton for January is 25.3 degrees
  • The most monthly precipitation in Symerton occurs in August with 6.8 inches
  • The air quality index in Symerton is 31% worse than the national average
  • The pollution index in Symerton is 36% better than the national average

Compare Symerton, IL Weather

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      Symerton 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
      January18°F34°F25°F2.5"
      February19°F36°F27°F2.8"
      March31°F50°F39°F4.5"
      April41°F63°F51°F4.9"
      May50°F73°F61°F4.7"
      June60°F83°F71°F5.4"
      July64°F85°F74°F5.7"
      August62°F83°F72°F6.8"
      September55°F77°F65°F5.4"
      October44°F64°F53°F5.7"
      November33°F51°F41°F4.9"
      December23°F37°F30°F3.7"

      Symerton 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.
      IndexSymertonIllinoisNational
      Air quality index554142
      Pollution index1,736,9303,148,6942,726,193

      Symerton air quality

      MeasurementTotal
      Days measured365
      Days with good air quality121
      Days with moderate air quality227
      Days w/ poor A.Q. for sensitive groups16
      Days with unhealthy air quality1

      Air quality details

      PollutantTotal
      Arsenic0.004%
      Benzene0.040%
      Carbon Tetrachloride0.000%
      Lead0.001%
      Mercury0.001%

      Average monthly Symerton temperature with heat index

      Symerton monthly precipitation with daily maximum

      Symerton monthly snow depth with daily maximum

      Symerton monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Shorewood, IL17,3030100.0%
      Braidwood, IL6,3380100.0%
      East Brooklyn, IL570100.0%
      Lakewood Shores, IL5660100.0%
      Wilmington, IL5,8830100.0%
      Symerton, IL725510.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      New Blaine, AR723628.0%
      Seba Dalkai, AZ724510.0%
      Mabie, CA724412.0%
      Smeltertown, CO721668.0%
      Ranger, GA724314.0%
      Symerton, IL725510.0%
      Source: The Symerton, 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.