Plymouth Connecticut Climate Data

Monthly Average Climate Data for Plymouth Connecticut

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January17.0 °F34.6 °F3.79 in.
February18.7 °F37.6 °F3.3 in.
March25.6 °F45.4 °F4.65 in.
April36.0 °F59.1 °F4.13 in.
May46.2 °F69.9 °F4.22 in.
June55.5 °F78.1 °F4.62 in.
July61.0 °F82.8 °F4.8 in.
August59.6 °F80.9 °F4.69 in.
September52.5 °F73.7 °F4.75 in.
October40.9 °F62.0 °F5.62 in.
November31.4 °F50.2 °F4.16 in.
December22.9 °F39.3 °F4.72 in.
Annual38.9 °F59.5 °F53.45 in.

Climate Data for Plymouth Connecticut

Average First Frost DateOct. 1 - Oct. 10
Average Last Frost DateMay 11 - May 20
Average Days With Frost125-150 Days
Plant Hardiness Zone - 2023Zone 6a : -10°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