Cohasset Massachusetts Climate Data

Monthly Average Climate Data for Cohasset Massachusetts

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January23.3 °F37.5 °F4.31 in.
February24.4 °F39.4 °F4.1 in.
March30.3 °F44.9 °F5.74 in.
April39.4 °F55.6 °F4.65 in.
May48.9 °F65.3 °F3.64 in.
June58.0 °F74.6 °F3.77 in.
July64.3 °F80.5 °F3.5 in.
August63.5 °F79.3 °F3.76 in.
September57.3 °F72.7 °F4.1 in.
October47.1 °F62.2 °F5.33 in.
November37.9 °F52.0 °F4.67 in.
December29.5 °F43.1 °F5.11 in.
Annual43.7 °F58.9 °F52.68 in.

Climate Data for Cohasset Massachusetts

Average First Frost DateOct. 21 - Oct. 31
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 6b : -5°F to 0°F
Current Drought ConditionsNormal
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation