Williamstown New Jersey Climate Data

Monthly Average Climate Data for Williamstown New Jersey

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January24.2 °F41.5 °F3.81 in.
February25.5 °F44.0 °F2.88 in.
March32.2 °F51.7 °F4.55 in.
April42.4 °F63.9 °F3.47 in.
May51.6 °F73.7 °F3.75 in.
June61.3 °F82.7 °F4.23 in.
July66.7 °F86.7 °F4.82 in.
August65.1 °F85.1 °F4.77 in.
September58.5 °F78.5 °F4.07 in.
October46.1 °F66.8 °F3.84 in.
November36.0 °F55.9 °F3.07 in.
December29.3 °F46.3 °F4.19 in.
Annual44.9 °F64.7 °F47.45 in.

Climate Data for Williamstown New Jersey

Average First Frost DateOct. 21 - Oct. 31
Average Last Frost DateMay 1 - May 10
Average Days With Frost75-100 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
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