Morris Plains New Jersey Climate Data

Monthly Average Climate Data for Morris Plains New Jersey

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January20.8 °F37.6 °F3.79 in.
February21.8 °F40.1 °F2.79 in.
March29.2 °F48.3 °F4.23 in.
April39.9 °F60.8 °F4.04 in.
May49.6 °F70.9 °F4.11 in.
June58.9 °F79.6 °F4.97 in.
July63.9 °F85.2 °F4.62 in.
August62.2 °F83.2 °F4.59 in.
September54.9 °F76.4 °F4.48 in.
October43.2 °F64.3 °F4.41 in.
November33.8 °F52.8 °F3.6 in.
December26.7 °F42.6 °F4.4 in.
Annual42.1 °F61.8 °F50.03 in.

Climate Data for Morris Plains New Jersey

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateMay 11 - May 20
Average Days With Frost100-125 Days
Plant Hardiness Zone - 2023Zone 7a : 0°F to 5°F
Plant Hardiness Zone - 2012Zone 6a : -10°F to -5°F
Current Drought ConditionsNormal
Köppen Climate ClassificationDfb - Humid Continental Mild Summer, Wet All Year