TODAY JUN21
TEMPERATURE
HUMIDITY
PRESSURE
WIND COND.
  • 7362Thu90%90%
  • 7058Fri70%40%
  • 7960Sat
  • 8059Sun
  • 8063Mon
daynightWeather update from Sterling Rockfalls at

Harmon Average Weather

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
January-24°F64°F26°F0.7"
February-15°F59°F25°F0.6"
March7°F79°F37°F1.7"
April19°F84°F51°F1.9"
May23°F91°F61°F2.1"
June46°F97°F71°F2.0"
July46°F102°F73°F2.8"
August48°F99°F72°F2.3"
September34°F93°F65°F1.9"
October21°F90°F53°F0.5"
November10°F75°F41°F2.0"
December-11°F55°F26°F0.4"

Did you know?

  • The highest monthly average temperature in Harmon for July is 73 degrees.
  • The lowest monthly average temperature in Harmon for February is 25 degrees.
  • The most monthly precipitation in Harmon occurs in July with 2.8 inches.
  • The air quality index in Harmon is 6% worse than the national average.
  • The pollution index in Harmon is 58% better than the national average.

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Compare Harmon, IL Weather To Other Cities

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 index534150
Pollution index2,097,7403,347,2955,066,862

Harmon air quality information

MeasurementTotal
Days measured365
Days with good air quality158
Days with moderate air quality204
Days w/ poor A.Q. for sensitive groups3
Days with unhealthy air quality

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.
Amboy, IL2,519198%
La Moille, IL839198%
Ohio, IL470198%
Dixon, IL14,8023138%
Lost Nation, IL6333138%
Harmon, IL151536%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
West Sunbury, PA1513138%
Maxville, MT1515510%
Kilbourne, OH1514314%
Greenbackville, VA1513628%
Cassandra, PA1514510%
Harmon, IL151536%
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.