Westfield, MA 01253 Frost Dates
Frost dates for Westfield, MA, ZIP 01253
Around 05/07 is the usual last spring frost, about 252 days away. The first fall frost typically arrives around 10/03, about 147 frost-free days later.
Zone 5b (-15 to -10°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 5b 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.
Why 05/07 isn't a guarantee
05/07 is the middle of 30 years of NOAA records, not a promise. Plant by 04/26 and you're betting against frost in roughly 9 years out of 10. 05/21 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Westfield compares
Westfield's growing season runs about 147 days, ranking 35,854 of 40,283 US ZIP codes measured here, longest to shortest. Within MA, it ranks 680 of 712.
Learn more
the frost range explains how to read the range around Westfield's dates instead of trusting one, and local microclimates explains what one yard in Westfield can differ from the 01253 normal.