TODAY MAR03
TEMPERATURE31
HUMIDITY89
PRESSURE29.92
WIND COND.260 11.2
  • 4726
  • 4524Thu
  • 4325Fri
  • 4630Sat
  • 5438Sun
daynightWeather update from Sterling Rockfalls at

Key findings

  • The highest monthly average temperature in Harmon for July is 74 degrees
  • The lowest monthly average temperature in Harmon for January is 23 degrees
  • The most monthly precipitation in Harmon occurs in November with 8 inches
  • The air quality index in Harmon is 16% better than the national average
  • The pollution index in Harmon is 59% better than the national average

Compare Harmon, IL Weather

      vs
      How would you rate the weather in Harmon?
      Write a review to give others more information about this area.
      How would you rate the air quality in Harmon?
      Write a review to give others more information about this area.
      See all Harmon poll results

      Harmon 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
      January15°F32°F23°F3.9"
      February16°F34°F25°F2.5"
      March30°F49°F38°F3.6"
      April40°F64°F51°F5.7"
      May51°F75°F62°F7.1"
      June60°F83°F71°F7.2"
      July63°F85°F74°F7.6"
      August61°F83°F72°F7.2"
      September53°F78°F65°F6.0"
      October43°F65°F53°F4.0"
      November31°F51°F40°F8.0"
      December20°F36°F28°F4.2"

      Harmon 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.
      IndexHarmonIllinoisNational
      Air quality index424150
      Pollution index2,097,7403,347,2955,066,862

      Harmon air quality information

      MeasurementTotal
      Days measured364
      Days with good air quality268
      Days with moderate air quality96
      Days w/ poor A.Q. for sensitive groups0
      Days with unhealthy air quality0

      Harmon air quality information

      PollutantTotal
      Arsenic0.001%
      Benzene0.060%
      Carbon Tetrachloride0.000%
      Lead0.001%
      Mercury0.300%

      Average monthly Harmon temperature with heat index

      Harmon monthly precipitation with daily maximum

      Harmon monthly snow depth with daily maximum

      Harmon monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Ohio, IL4700100%
      Amboy, IL2,5190100%
      La Moille, IL8390100%
      New Bedford, IL594216%
      Coleta, IL1964216%
      Harmon, IL1514216%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Kilbourne, OH151468%
      Greenbackville, VA1513628%
      Rudyard, MT1512158%
      Lovelaceville, KY1514412%
      Cassandra, PA1514118%
      Harmon, IL1514216%
      Source: The Harmon, 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.