TODAY APR23
TEMPERATURE57
HUMIDITY42
PRESSURE100750
WIND COND.230 20.5
  • 663720%60%
  • 4235Wed
  • 5545Thu
  • 6356Fri50%
  • 7459Sat
daynightWeather update from Chicago / Wheeling, Pal-Waukee Airport at
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Weather Quick Facts

  • The highest monthly average temperature in Northfield for August is 74.6 degrees
  • The lowest monthly average temperature in Northfield for February is 25.4 degrees
  • The most monthly precipitation in Northfield occurs in August with 12.8 inches
  • The air quality index in Northfield is 31% worse than the national average
  • The pollution index in Northfield is 39% worse than the national average

Compare Northfield, IL Weather

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      Northfield 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
      January21°F34°F27°F4.6"
      February20°F32°F25°F1.8"
      March30°F49°F39°F2.6"
      April39°F60°F49°F4.5"
      May50°F72°F60°F3.5"
      June63°F84°F73°F3.8"
      July65°F84°F74°F5.4"
      August67°F83°F75°F12.8"
      September59°F80°F69°F6.7"
      October49°F66°F57°F1.7"
      November33°F50°F41°F2.4"
      December19°F32°F26°F1.7"

      Northfield 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.
      IndexNorthfieldIllinoisNational
      Air quality index554142
      Pollution index3,795,4103,148,6942,726,193

      Northfield 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

      Northfield air quality information

      PollutantTotal
      Arsenic0.030%
      Benzene0.050%
      Carbon Tetrachloride0.010%
      Lead0.003%
      Mercury0.310%

      Average monthly Northfield temperature with heat index

      Northfield monthly precipitation with daily maximum

      Northfield monthly snow depth with daily maximum

      Northfield monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      North Chicago, IL29,9673922.0%
      Mundelein, IL31,5743922.0%
      Knollwood, IL1,6843922.0%
      Green Oaks, IL3,8823922.0%
      Lake Bluff, IL5,5403922.0%
      Northfield, IL5,6785510.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Montrose-Ghent, OH5,6774314.0%
      Trenton, MO5,6794314.0%
      Lackland AFB, TX5,679492.0%
      Sharon Hill, PA5,680512.0%
      Eastwood, MI5,6753824.0%
      Northfield, IL5,6785510.0%
      Source: The Northfield, 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.