Ellsworth, ME 04662 Frost Dates
Frost dates for Ellsworth, ME, ZIP 04662
Typically, the last spring freeze lands around 04/27, roughly 242 days out. The first fall frost typically arrives around 10/22, about 177 frost-free days later.
The USDA Plant Hardiness Zone Map puts Ellsworth in Zone 6a (-10 to -5°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 6a around Ellsworth has about 8 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 04/27 isn't a guarantee
04/27 is the middle of 30 years of NOAA records, not a promise. Plant by 04/15 and you're betting against frost in roughly 9 years out of 10. 05/08 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Ellsworth compares
About 177 days separate Ellsworth's last and first frost, putting it 26,078 of 40,283 ZIP codes nationally. Within ME, it ranks 42 of 456.
Learn more
local microclimates explains what one yard in Ellsworth can differ from the 04662 normal, and zone vs. frost date explains why Zone 6a and Ellsworth's frost date answer different questions.