Massachusetts climate almanac
Massachusetts's climate, read through its 16 NOAA stations, is mainly mild humid continental (northeast, midwest, pacific northwest). The mean frost-free season runs from about April 30 to October 15, roughly 173 days.
Stations 16 NOAA 1991-2020 normals
Mean frost-free season 173 days 147 to 218 across the state
Typical frost window April 30 - October 15 Median last and first frost
Main climate types 1 Mild humid continental (Northeast, Midwest, Pacific Northwest) (16)
What this means for your home
In Massachusetts, the difference between the shortest and longest frost-free pockets is 71 days. That is the difference between a tomato crop that struggles and one that runs into October, between one fertilizer timing and another. Set your place above to tune every date to your nearest station.
Major cities in Massachusetts
Pick a city to see its frost and planting dates, or set your own place above.