Westfield, MA 01011 Frost Dates
Frost dates for Westfield, MA, ZIP 01011
The last spring frost here typically falls around 05/13, about 258 days from today. The first fall frost typically arrives around 10/02, about 144 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 Westfield, not a forecast for this year.
What to do before the first frost
Zone 6a around Westfield has about 5 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
05/13 is the middle of 30 years of NOAA records, not a promise. Plant by 04/29 and you're betting against frost in roughly 9 years out of 10. 05/26 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Westfield compares
Westfield's growing season runs about 144 days, ranking 36,331 of 40,283 US ZIP codes measured here, longest to shortest. Within MA, it ranks 688 of 712.
Learn more
local microclimates explains what one yard in Westfield can differ from the 01011 normal, and zone vs. frost date explains why Zone 6a and Westfield's frost date answer different questions.