Pittsfield, MA 01229 Frost Dates
Frost dates for Pittsfield, MA, ZIP 01229
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.
Pittsfield 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
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 05/07 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 Pittsfield compares
About 147 days separate Pittsfield's last and first frost, putting it 35,842 of 40,283 ZIP codes nationally. Within MA, it ranks 668 of 712.
Learn more
local microclimates explains what one yard in Pittsfield can differ from the 01229 normal, and zone vs. frost date explains why Zone 5b and Pittsfield's frost date answer different questions.