Cambridge, MA 02142 Frost Dates
Cambridge, MA: when does the frost end?
The last spring frost here typically falls around 04/04, about 219 days from today. Fall's first freeze usually shows up around 11/09, roughly 218 days after the last spring frost.
Cambridge sits in USDA Zone 7a (0 to 5°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
Stretching the season past the first frost
With roughly 10 weeks until Cambridge's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
04/04 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/25 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/17 and only about 1 year in 10 sees frost after that.
Cambridge against the rest of the dataset
Cambridge's growing season runs about 218 days, ranking 13,170 of 40,283 US ZIP codes measured here, longest to shortest. Within MA, it ranks 11 of 712.
Learn more
Before leaning on 02142's figures: local microclimates explains what one yard in Cambridge can differ from the 02142 normal, while zone vs. frost date explains why Zone 7a and Cambridge's frost date answer different questions.