Summit New Jersey Climate Data

Monthly Average Climate Data for Summit New Jersey

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-5.9 °C3.6 °C92.46 mm
February-5.2 °C5.1 °C72.64 mm
March-1.3 °C9.7 °C107.95 mm
April4.6 °C16.4 °C102.36 mm
May9.8 °C21.9 °C104.14 mm
June15.1 °C26.9 °C118.62 mm
July17.9 °C29.7 °C116.84 mm
August17 °C28.7 °C115.06 mm
September13.1 °C24.9 °C111.25 mm
October6.4 °C18.2 °C112.52 mm
November1.2 °C12 °C89.41 mm
December-2.8 °C6.4 °C107.95 mm
Annual5.8 °C17 °C1251.2 mm

Climate Data for Summit 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 6a : -23.3°C to -20.6°C
Current Drought ConditionsNormal
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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