TODAY DEC18
TEMPERATURE47°F
HUMIDITY59%
PRESSURE29.97 inHg
WIND COND.260° 10.4 mph
  • 5037Tue
  • 4326Wed
  • 3728Thu
  • 4842Fri60%
  • 5739Sat60% | 30%
daynightWeather update from Newark, Newark International Airport, on 18 Dec 15:51 pm EST

Iselin 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
January5°F48°F28°F0.0"
February12°F66°F36°Fn/a
March12°F70°F42°Fn/a
April34°F92°F54°F0.0"
May43°F88°F63°F0.0"
June49°F88°F68°F0.0"
July59°F90°F75°F0.0"
August57°F95°F75°F0.0"
September52°F93°F68°F0.0"
October34°F79°F55°F0.0"
November25°F70°F49°F0.0"
December12°F68°F37°F0.0"

Did you know?

  • The highest monthly average temperature in Iselin for August is 75 degrees.
  • The lowest monthly average temperature in Iselin for January is 28 degrees.
  • The most monthly precipitation in Iselin occurs in July with 0 inches.
  • The air quality index in Iselin is 6% worse than the national average.
  • The pollution index in Iselin is 151% worse than the national average.

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Compare Iselin, NJ Weather To Other Cities

Iselin 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.
IndexIselinNew JerseyNational
Air quality index534650
Pollution index12,837,2007,088,7445,100,859

Iselin air quality information

MeasurementTotal
Days measured365
Days with good air quality161
Days with moderate air quality189
Days w/ poor A.Q. for sensitive groups15
Days with unhealthy air quality

Iselin air quality information

PollutantTotal
Arsenic0.010%
Benzene0.110%
Carbon Tetrachloride0.050%
Lead0.020%
Mercury0.230%

Average monthly Iselin temperature with heat index

Iselin monthly precipitation with daily maximum

Iselin monthly snow depth with daily maximum

Iselin monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Silver Lake, NJ3,5943138%
East Franklin, NJ7,6474020%
Highland Park, NJ14,2244020%
Milltown, NJ6,9744020%
South River, NJ16,1774020%
Iselin, NJ18,457536%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Bensenville, IL18,4576020%
Ellensburg, WA18,4551864%
Natchitoches, LA18,460435770%
Eastlake, OH18,4485510%
Jasmine Estates, FL18,4704314%
Iselin, NJ18,457536%
Source: The Iselin, NJ 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.