Boston Massachusetts Climate Data

Monthly Average Climate Data for Boston Massachusetts

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January21.3 °F37.1 °F4.05 in.
February22.8 °F39.3 °F3.69 in.
March29.6 °F45.5 °F4.92 in.
April39.8 °F57.0 °F4.35 in.
May49.4 °F67.3 °F3.57 in.
June59.1 °F76.7 °F4.12 in.
July65.1 °F82.6 °F3.64 in.
August63.9 °F80.9 °F3.67 in.
September56.8 °F73.7 °F3.72 in.
October45.7 °F62.6 °F4.87 in.
November36.2 °F52.0 °F4.08 in.
December27.6 °F42.5 °F4.96 in.
Annual43.1 °F59.8 °F49.64 in.

Climate Data for Boston 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 7a : 0°F to 5°F
Current Drought ConditionsNormal
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation