Chelsea Massachusetts Climate Data

Monthly Average Climate Data for Chelsea Massachusetts

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January21.6 °F37.0 °F4.07 in.
February23.1 °F39.2 °F3.72 in.
March29.9 °F45.3 °F4.93 in.
April40.0 °F56.6 °F4.37 in.
May49.5 °F66.8 °F3.49 in.
June59.3 °F76.3 °F4.08 in.
July65.3 °F82.1 °F3.58 in.
August64.2 °F80.5 °F3.56 in.
September57.2 °F73.3 °F3.67 in.
October46.1 °F62.3 °F4.91 in.
November36.6 °F51.9 °F4.13 in.
December27.9 °F42.5 °F4.93 in.
Annual43.4 °F59.5 °F49.44 in.

Climate Data for Chelsea Massachusetts

Average First Frost DateNov. 1 - Nov. 10
Average Last Frost DateApr. 21 - Apr. 30
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