Somerville Massachusetts Climate Data

Monthly Average Climate Data for Somerville Massachusetts

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January20.2 °F36.9 °F4.08 in.
February21.8 °F39.2 °F3.72 in.
March28.8 °F45.8 °F4.94 in.
April39.0 °F57.5 °F4.36 in.
May48.8 °F67.9 °F3.68 in.
June58.4 °F77.1 °F4.22 in.
July64.3 °F82.9 °F3.78 in.
August62.9 °F81.3 °F3.78 in.
September55.7 °F74.2 °F3.86 in.
October44.4 °F62.7 °F4.88 in.
November35.0 °F52.2 °F4.1 in.
December26.5 °F42.3 °F4.95 in.
Annual42.2 °F60 °F50.35 in.

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 : -5°F to 0°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