Ellsworth, ME 04612 Frost Dates
Ellsworth, ME: when does the frost end?
The last spring frost here typically falls around 04/27, about 242 days from today. Fall's first freeze usually shows up around 10/22, roughly 177 days after the last spring frost.
Zone 6a (-10 to -5°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Ellsworth, not a forecast for this year.
Stretching the season past the first frost
With roughly 8 weeks until Ellsworth's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 04/27 isn't a guarantee
04/27 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/15 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/08 and only about 1 year in 10 sees frost after that.
Ellsworth against the rest of the dataset
At roughly 177 frost-free days, Ellsworth places 26,070 of 40,283 ZIP codes in this dataset. Within ME, it ranks 34 of 456.
Learn more
Before leaning on 04612's figures: local microclimates explains what one yard in Ellsworth can differ from the 04612 normal, while zone vs. frost date explains why Zone 6a and Ellsworth's frost date answer different questions.