Princeton New Jersey Climate Data

Monthly Average Climate Data for Princeton New Jersey

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-5.2 °C4.3 °C88.9 mm
February-4.3 °C5.7 °C70.1 mm
March-0.4 °C10.1 °C111 mm
April5.1 °C16.8 °C97.03 mm
May10.5 °C22.2 °C103.89 mm
June15.6 °C27.2 °C116.59 mm
July18.5 °C29.8 °C128.78 mm
August17.6 °C28.8 °C116.33 mm
September13.6 °C25.3 °C106.93 mm
October7.2 °C18.6 °C103.38 mm
November1.6 °C12.7 °C86.87 mm
December-2.4 °C7 °C114.3 mm
Annual6.5 °C17.4 °C1244.1 mm

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 : -17.8°C to -15°C
Plant Hardiness Zone - 2012Zone 6b : -20.6°C to -17.8°C
Current Drought ConditionsNormal
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation