Greenfield, MA 01347 Frost Dates
Frost dates for Greenfield, MA, ZIP 01347
Typically, the last spring freeze lands around 05/01, roughly 246 days out. The first fall frost typically arrives around 10/11, about 162 frost-free days later.
Zone 6a (-10 to -5°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Greenfield, not a forecast for this year.
What to do before the first frost
Zone 6a around Greenfield has about 6 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
How much risk comes with planting early here
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
At roughly 162 frost-free days, Greenfield places 31,658 of 40,283 ZIP codes in this dataset. Within MA, it ranks 480 of 712.
Learn more
zone vs. frost date explains why Zone 6a and Greenfield's frost date answer different questions, and the frost range explains how to read the range around Greenfield's dates instead of trusting one.