Pittsfield, MA 01225 Frost Dates
Frost dates for Pittsfield, MA, ZIP 01225
Typically, the last spring freeze lands around 05/10, roughly 255 days out. The first fall frost typically arrives around 10/04, about 147 frost-free days later.
The USDA Plant Hardiness Zone Map puts Pittsfield in Zone 5b (-15 to -10°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
Zone 5b around Pittsfield 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 05/10 isn't a guarantee
05/10 is the middle of 30 years of NOAA records, not a promise. Plant by 04/27 and you're betting against frost in roughly 9 years out of 10. 05/25 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Pittsfield compares
At roughly 147 frost-free days, Pittsfield places 35,841 of 40,283 ZIP codes in this dataset. Within MA, it ranks 667 of 712.
Learn more
zone vs. frost date explains why Zone 5b and Pittsfield's frost date answer different questions, and the frost range explains how to read the range around Pittsfield's dates instead of trusting one.