Presque Isle, ME 04758 Frost Dates
Presque Isle, ME: when does the frost end?
Typically, the last spring freeze lands around 05/25, roughly 270 days out. Fall's first freeze usually shows up around 09/18, roughly 115 days after the last spring frost.
Zone 4a (-30 to -25°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 Presque Isle, not a forecast for this year.
Stretching the season past the first frost
With roughly 3 weeks until Presque Isle's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
05/25 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/09 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/07 and only about 1 year in 10 sees frost after that.
Presque Isle against the rest of the dataset
Presque Isle's growing season runs about 115 days, ranking 39,304 of 40,283 US ZIP codes measured here, longest to shortest. Within ME, it ranks 449 of 456.
Learn more
Before leaning on 04758's figures: local microclimates explains what one yard in Presque Isle can differ from the 04758 normal, while zone vs. frost date explains why Zone 4a and Presque Isle's frost date answer different questions.