South River New Jersey Climate Data

Monthly Average Climate Data for South River New Jersey

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January23.7 °F40.3 °F3.64 in.
February25.0 °F43.2 °F2.82 in.
March31.9 °F51.1 °F4.21 in.
April41.7 °F63.2 °F3.83 in.
May51.3 °F73.0 °F4.03 in.
June60.5 °F81.9 °F4.54 in.
July66.0 °F86.9 °F4.87 in.
August64.3 °F84.7 °F4.6 in.
September57.3 °F78.3 °F4.26 in.
October45.7 °F66.2 °F4.1 in.
November35.9 °F55.5 °F3.37 in.
December28.9 °F45.5 °F4.3 in.
Annual44.4 °F64.2 °F48.57 in.

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 : 0°F to 5°F
Plant Hardiness Zone - 2012Zone 6b : -5°F to 0°F
Current Drought ConditionsNormal
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation