TODAY JUN19
TEMPERATURE77
HUMIDITY90
PRESSURE29.86
WIND COND.
  • 8861Tue20%
  • 8262Wed60%
  • 8561Thu40%
  • 8263Fri
  • 8267Sat50%
daynightWeather update from Trenton, Mercer County Airport at

Princeton 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
January2°F72°F34°F3.0"
February8°F72°F33°F1.9"
March10°F81°F41°F2.9"
April27°F91°F53°F4.1"
May35°F90°F61°F3.0"
June44°F97°F72°F5.7"
July53°F98°F76°F5.0"
August54°F97°F75°F3.2"
September41°F94°F68°F3.4"
October29°F90°F56°F3.6"
November19°F74°F47°F2.5"
December8°F72°F37°F4.0"

Did you know?

  • The highest monthly average temperature in Princeton for July is 76 degrees.
  • The lowest monthly average temperature in Princeton for February is 33 degrees.
  • The most monthly precipitation in Princeton occurs in June with 5.7 inches.
  • The air quality index in Princeton is 19% better than the national average.
  • The pollution index in Princeton is 34% better than the national average.

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Compare Princeton, NJ Weather To Other Cities

Princeton 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.
IndexPrincetonNew JerseyNational
Air quality index404550
Pollution index3,313,9207,146,1325,066,862

Princeton air quality information

MeasurementTotal
Days measured365
Days with good air quality257
Days with moderate air quality106
Days w/ poor A.Q. for sensitive groups2
Days with unhealthy air quality

Princeton air quality information

PollutantTotal
Arsenic0.350%
Benzene0.020%
Carbon Tetrachloride0.004%
Lead0.350%
Mercury0.340%

Average monthly Princeton temperature with heat index

Princeton monthly precipitation with daily maximum

Princeton monthly snow depth with daily maximum

Princeton monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Blawenburg, NJ3054020%
Clearbrook Park, NJ3,1144020%
Dayton, NJ7,3084020%
Finderne, NJ6,3364020%
Griggstown, NJ7924020%
Princeton, NJ30,1684020%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Madison Heights, MI30,168524%
Needham, MA30,167476%
Kahului, HI30,1642844%
Post Falls, ID30,1573922%
Texarkana, AR30,1553824%
Princeton, NJ30,1684020%
Source: The Princeton, 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.