Presque Isle, ME 04734 Frost Dates
04734, near Presque Isle, ME: the frost window
Around 05/30 is the usual last spring frost, about 275 days away. Fall's first freeze usually shows up around 09/13, roughly 106 days after the last spring frost.
Presque Isle sits in USDA Zone 4a (-30 to -25°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.
Stretching the season past the first frost
Presque Isle's growing season runs out in roughly 2 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 05/30 isn't a guarantee
05/30 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/12 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/12 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 106 days, ranking 39,575 of 40,283 US ZIP codes measured here, longest to shortest. Within ME, it ranks 451 of 456.
Learn more
Two guides worth reading on 04734: local microclimates, on what one yard in Presque Isle can differ from the 04734 normal, and zone vs. frost date, on why Zone 4a and Presque Isle's frost date answer different questions.