Morristown New Jersey Climate Data

Monthly Average Climate Data for Morristown New Jersey

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January21.0 °F38.2 °F3.78 in.
February22.2 °F40.7 °F2.82 in.
March29.5 °F49.0 °F4.28 in.
April40.1 °F61.4 °F4.07 in.
May49.8 °F71.4 °F4.13 in.
June58.9 °F80.2 °F4.85 in.
July64.0 °F85.3 °F4.66 in.
August62.4 °F83.5 °F4.57 in.
September55.0 °F76.7 °F4.43 in.
October43.4 °F64.7 °F4.43 in.
November34.0 °F53.4 °F3.6 in.
December26.7 °F43.2 °F4.4 in.
Annual42.3 °F62.3 °F50.02 in.

Climate Data for Morristown 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 ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation