Greenfield, MA 01302 Frost Dates
01302, near Greenfield, MA: the frost window
The last spring frost here typically falls around 05/01, about 246 days from today. Fall's first freeze usually shows up around 10/11, roughly 162 days after the last spring frost.
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.
Stretching the season past the first frost
Greenfield's growing season runs out in roughly 6 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
The actual range around Greenfield's last frost
05/01 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/19 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/15 and only about 1 year in 10 sees frost after that.
Greenfield against the rest of the dataset
About 162 days separate Greenfield's last and first frost, putting it 31,654 of 40,283 ZIP codes nationally. Within MA, it ranks 476 of 712.
Learn more
Two guides worth reading on 01302: the frost range, on how to read the range around Greenfield's dates instead of trusting one, and local microclimates, on what one yard in Greenfield can differ from the 01302 normal.