Westfield New Jersey Climate Data

Monthly Average Climate Data for Westfield New Jersey

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-4.9 °C4.3 °C91.69 mm
February-4.2 °C5.8 °C73.15 mm
March-0.3 °C10.4 °C107.7 mm
April5.4 °C17.2 °C99.82 mm
May10.7 °C22.7 °C102.62 mm
June15.9 °C27.7 °C116.08 mm
July18.9 °C30.4 °C122.94 mm
August17.9 °C29.4 °C113.54 mm
September14.1 °C25.7 °C109.73 mm
October7.4 °C18.9 °C109.73 mm
November2.2 °C12.7 °C87.12 mm
December-1.9 °C7.1 °C106.43 mm
Annual6.8 °C17.7 °C1240.55 mm

Climate Data for Westfield 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 6b : -20.6°C to -17.8°C
Current Drought ConditionsNormal
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
2024 plantmaps.com