Newburyport, MA 01950 Frost Dates
Frost dates for Newburyport, MA, ZIP 01950
Typically, the last spring freeze lands around 05/03, roughly 248 days out. The first fall frost typically arrives around 10/08, about 158 frost-free days later.
The USDA Plant Hardiness Zone Map puts Newburyport in Zone 6b (-5 to 0°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 6b around Newburyport has about 6 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 05/03 isn't a guarantee
05/03 is the middle of 30 years of NOAA records, not a promise. Plant by 04/22 and you're betting against frost in roughly 9 years out of 10. 05/17 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Newburyport compares
About 158 days separate Newburyport's last and first frost, putting it 32,924 of 40,283 ZIP codes nationally. Within MA, it ranks 580 of 712.
Learn more
local microclimates explains what one yard in Newburyport can differ from the 01950 normal, and zone vs. frost date explains why Zone 6b and Newburyport's frost date answer different questions.