Somerville Massachusetts Climate Data

Monthly Average Climate Data for Somerville Massachusetts

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-6.6 °C2.7 °C103.63 mm
February-5.7 °C4 °C94.49 mm
March-1.8 °C7.7 °C125.48 mm
April3.9 °C14.2 °C110.74 mm
May9.3 °C19.9 °C93.47 mm
June14.7 °C25.1 °C107.19 mm
July17.9 °C28.3 °C96.01 mm
August17.2 °C27.4 °C96.01 mm
September13.2 °C23.4 °C98.04 mm
October6.9 °C17.1 °C123.95 mm
November1.7 °C11.2 °C104.14 mm
December-3.1 °C5.7 °C125.73 mm
Annual5.6 °C15.6 °C1278.88 mm

Climate Data for Somerville Massachusetts

Average First Frost DateOct. 21 - Oct. 31
Average Last Frost DateMay 1 - May 10
Average Days With Frost100-125 Days
Plant Hardiness Zone - 2023Zone 6b : -20.6°C to -17.8°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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