Greenfield, MA 01370 Frost Dates
When can you plant in Greenfield, MA?
The last spring frost here typically falls around 05/01, about 246 days from today. The first fall frost typically arrives around 10/11, about 162 frost-free days later.
The USDA Plant Hardiness Zone Map puts Greenfield in Zone 5b (-15 to -10°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
About 6 weeks of growing season left in Greenfield before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 05/01 isn't a guarantee
05/01 is the middle of 30 years of NOAA records, not a promise. Plant by 04/19 and you're betting against frost in roughly 9 years out of 10. 05/15 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Greenfield compares
About 162 days separate Greenfield's last and first frost, putting it 31,663 of 40,283 ZIP codes nationally. Within MA, it ranks 485 of 712.
Learn more
local microclimates covers what one yard in Greenfield can differ from the 01370 normal. zone vs. frost date covers why Zone 5b and Greenfield's frost date answer different questions.