Raritan New Jersey Climate Data

Monthly Average Climate Data for Raritan New Jersey

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-5.7 °C4.1 °C90.68 mm
February-4.9 °C5.6 °C69.85 mm
March-1 °C10.1 °C105.41 mm
April4.7 °C16.9 °C97.54 mm
May10.1 °C22.4 °C103.38 mm
June15.1 °C27.3 °C114.81 mm
July18.1 °C30.1 °C123.7 mm
August17.2 °C28.9 °C116.84 mm
September13.2 °C25.3 °C105.66 mm
October6.8 °C18.6 °C108.2 mm
November1.1 °C12.6 °C83.82 mm
December-2.7 °C6.9 °C105.92 mm
Annual6 °C17.4 °C1225.81 mm

Climate Data for Raritan New Jersey

Average First Frost DateOct. 21 - Oct. 31
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 6a : -23.3°C to -20.6°C
Current Drought ConditionsNormal
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
2024 plantmaps.com