Allentown New Jersey Climate Data

Monthly Average Climate Data for Allentown New Jersey

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January24.0 °F40.8 °F3.54 in.
February25.5 °F43.3 °F2.64 in.
March32.4 °F51.0 °F4.33 in.
April42.4 °F62.9 °F3.55 in.
May52.0 °F72.5 °F3.98 in.
June61.2 °F81.8 °F4.47 in.
July66.6 °F86.1 °F4.91 in.
August65.0 °F84.6 °F4.65 in.
September57.8 °F78.2 °F4.1 in.
October46.2 °F66.3 °F3.84 in.
November36.2 °F56.0 °F3.28 in.
December29.0 °F45.7 °F4.26 in.
Annual44.9 °F64.1 °F47.55 in.

Climate Data for Allentown 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