Boston Massachusetts Climate Data

Monthly Average Climate Data for Boston Massachusetts

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-5.9 °C2.8 °C102.87 mm
February-5.1 °C4.1 °C93.73 mm
March-1.3 °C7.5 °C124.97 mm
April4.3 °C13.9 °C110.49 mm
May9.7 °C19.6 °C90.68 mm
June15.1 °C24.8 °C104.65 mm
July18.4 °C28.1 °C92.46 mm
August17.7 °C27.2 °C93.22 mm
September13.8 °C23.2 °C94.49 mm
October7.6 °C17 °C123.7 mm
November2.3 °C11.1 °C103.63 mm
December-2.4 °C5.8 °C125.98 mm
Annual6.2 °C15.4 °C1260.87 mm

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 : -17.8°C to -15°C
Plant Hardiness Zone - 2012Zone 7a : -17.8°C to -15°C
Current Drought ConditionsNormal
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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