Princeton New Jersey Climate Data

Monthly Average Climate Data for Princeton New Jersey

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January22.7 °F39.7 °F3.5 in.
February24.2 °F42.3 °F2.76 in.
March31.2 °F50.2 °F4.37 in.
April41.1 °F62.3 °F3.82 in.
May50.9 °F71.9 °F4.09 in.
June60.0 °F81.0 °F4.59 in.
July65.3 °F85.7 °F5.07 in.
August63.7 °F83.8 °F4.58 in.
September56.4 °F77.5 °F4.21 in.
October44.9 °F65.4 °F4.07 in.
November34.8 °F54.9 °F3.42 in.
December27.6 °F44.6 °F4.5 in.
Annual43.6 °F63.3 °F48.98 in.

Climate Data for Princeton New Jersey

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateMay 1 - May 10
Average Days With Frost100-125 Days
Plant Hardiness Zone - 2023Zone 7a : 0°F to 5°F
Plant Hardiness Zone - 2012Zone 6b : -5°F to 0°F
Current Drought ConditionsNormal
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation