Ellsworth, ME 04684 Frost Dates
Frost dates for Ellsworth, ME, ZIP 04684
Around 05/08 is the usual last spring frost, about 253 days away. The first fall frost typically arrives around 10/09, about 152 frost-free days later.
Ellsworth 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 Ellsworth 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 05/08 isn't a guarantee
05/08 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. 05/23 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Ellsworth compares
At roughly 152 frost-free days, Ellsworth places 34,726 of 40,283 ZIP codes in this dataset. Within ME, it ranks 240 of 456.
Learn more
zone vs. frost date explains why Zone 5b and Ellsworth's frost date answer different questions, and the frost range explains how to read the range around Ellsworth's dates instead of trusting one.