Williamstown New Jersey Climate Data

Monthly Average Climate Data for Williamstown New Jersey

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-4.3 °C5.3 °C96.77 mm
February-3.6 °C6.7 °C73.15 mm
March0.1 °C10.9 °C115.57 mm
April5.8 °C17.7 °C88.14 mm
May10.9 °C23.2 °C95.25 mm
June16.3 °C28.2 °C107.44 mm
July19.3 °C30.4 °C122.43 mm
August18.4 °C29.5 °C121.16 mm
September14.7 °C25.8 °C103.38 mm
October7.8 °C19.3 °C97.54 mm
November2.2 °C13.3 °C77.98 mm
December-1.5 °C7.9 °C106.43 mm
Annual7.2 °C18.2 °C1205.24 mm

Climate Data for Williamstown New Jersey

Average First Frost DateOct. 21 - Oct. 31
Average Last Frost DateMay 1 - May 10
Average Days With Frost75-100 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
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