TODAY MAY06
TEMPERATURE47
HUMIDITY60
PRESSURE30.12
WIND COND.180 7.6
  • 5837Fri20%20%
  • 5742Sat30%
  • 5441Sun50%
  • 5540Mon
  • 5941Tue
daynightWeather update from Lansing Municipal Airport at

Key findings

  • The highest monthly average temperature in Thornton for July is 74 degrees
  • The lowest monthly average temperature in Thornton for January is 25.6 degrees
  • The most monthly precipitation in Thornton occurs in July with 8 inches
  • The air quality index in Thornton is 11% worse than the national average
  • The pollution index in Thornton is 69% better than the national average

Compare Thornton, IL Weather

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      Thornton 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°F26°F4.5"
      February19°F35°F27°F3.6"
      March31°F49°F39°F4.4"
      April40°F62°F50°F5.4"
      May50°F72°F60°F6.5"
      June60°F81°F70°F5.8"
      July64°F84°F74°F8.0"
      August63°F82°F72°F7.5"
      September56°F76°F65°F5.4"
      October45°F64°F54°F6.2"
      November33°F51°F42°F5.4"
      December24°F38°F31°F3.8"

      Thornton 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.
      IndexThorntonIllinoisNational
      Air quality index554150
      Pollution index1,558,0703,347,2955,066,862

      Thornton air quality information

      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

      Thornton air quality information

      PollutantTotal
      Arsenic0.010%
      Benzene0.010%
      Carbon Tetrachloride0.070%
      Lead0.090%
      Mercury0.010%

      Average monthly Thornton temperature with heat index

      Thornton monthly precipitation with daily maximum

      Thornton monthly snow depth with daily maximum

      Thornton monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Crown Point, IN28,7433726%
      Ford Heights, IL2,7755510%
      Sauk Village, IL10,5415510%
      East Hazel Crest, IL1,5955510%
      Hazel Crest, IL13,9245510%
      Thornton, IL2,6145510%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Derry, PA2,6143922%
      New London, OH2,6144314%
      Leadville, CO2,614476%
      Rhinebeck, NY2,6143628%
      Gambrills, MD2,613468%
      Thornton, IL2,6145510%
      Source: The Thornton, 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.