Cohasset Massachusetts Climate Data

Monthly Average Climate Data for Cohasset Massachusetts

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-4.8 °C3.1 °C109.47 mm
February-4.2 °C4.1 °C104.14 mm
March-0.9 °C7.2 °C145.8 mm
April4.1 °C13.1 °C118.11 mm
May9.4 °C18.5 °C92.46 mm
June14.4 °C23.7 °C95.76 mm
July17.9 °C26.9 °C88.9 mm
August17.5 °C26.3 °C95.5 mm
September14.1 °C22.6 °C104.14 mm
October8.4 °C16.8 °C135.38 mm
November3.3 °C11.1 °C118.62 mm
December-1.4 °C6.2 °C129.79 mm
Annual6.5 °C15 °C1338.07 mm

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 : -17.8°C to -15°C
Plant Hardiness Zone - 2012Zone 6b : -20.6°C to -17.8°C
Current Drought ConditionsNormal
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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