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Westfield 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
January26°F42°F34°F6.3"
February24°F42°F32°F4.9"
March31°F50°F40°F7.3"
April46°F67°F55°F5.0"
May56°F76°F65°F9.9"
June64°F83°F73°F8.3"
July71°F87°F78°F8.3"
August67°F84°F75°F7.8"
September61°F80°F70°F4.9"
October54°F72°F62°F6.3"
November38°F56°F46°F5.9"
December33°F46°F39°F5.8"

Did you know?

  • The highest monthly average temperature in Westfield for July is 78 degrees.
  • The lowest monthly average temperature in Westfield for February is 32 degrees.
  • The most monthly precipitation in Westfield occurs in May with 9.9 inches.
  • The air quality index in Westfield is 6% worse than the national average.
  • The pollution index in Westfield is 153% worse than the national average.

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Compare Westfield, NJ Weather To Other Cities

Westfield 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.
IndexWestfieldNew JerseyNational
Air quality index534550
Pollution index12,837,2007,146,1325,066,862

Westfield 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

Westfield air quality information

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

Average monthly Westfield temperature with heat index

Westfield monthly precipitation with daily maximum

Westfield monthly snow depth with daily maximum

Westfield monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Mendham, NJ5,0123922%
Kenvil, NJ3,1263922%
Manville, NJ10,4484020%
Middlebush, NJ2,5744020%
Six Mile Run, NJ2,6554020%
Westfield, NJ30,438536%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Ballwin, MO30,4316020%
Algonquin, IL30,4133138%
Estero, FL30,4703334%
Aiken, SC30,4034216%
Clearfield, UT30,483492%
Westfield, NJ30,438536%
Source: The Westfield, 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.