Greenfield, MA 01378 Frost Dates
When can you plant in Greenfield, MA?
Around 04/25 is the usual last spring frost, about 240 days away. The first fall frost typically arrives around 10/17, about 175 frost-free days later.
Greenfield sits in USDA Zone 5b (-15 to -10°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.
What to do before the first frost
About 7 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.
How much risk comes with planting early here
04/25 is the middle of 30 years of NOAA records, not a promise. Plant by 04/13 and you're betting against frost in roughly 9 years out of 10. 05/08 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Greenfield compares
About 175 days separate Greenfield's last and first frost, putting it 26,782 of 40,283 ZIP codes nationally. Within MA, it ranks 303 of 712.
Learn more
the frost range covers how to read the range around Greenfield's dates instead of trusting one. local microclimates covers what one yard in Greenfield can differ from the 01378 normal.