South River New Jersey Climate Data

Monthly Average Climate Data for South River New Jersey

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-4.6 °C4.6 °C92.46 mm
February-3.9 °C6.2 °C71.63 mm
March-0.1 °C10.6 °C106.93 mm
April5.4 °C17.3 °C97.28 mm
May10.7 °C22.8 °C102.36 mm
June15.8 °C27.7 °C115.32 mm
July18.9 °C30.5 °C123.7 mm
August17.9 °C29.3 °C116.84 mm
September14.1 °C25.7 °C108.2 mm
October7.6 °C19 °C104.14 mm
November2.2 °C13.1 °C85.6 mm
December-1.7 °C7.5 °C109.22 mm
Annual6.9 °C17.9 °C1233.68 mm

Climate Data for South River 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
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