Presque Isle, ME 04763 Frost Dates
04763, near Presque Isle, ME: the frost window
Typically, the last spring freeze lands around 05/19, roughly 264 days out. Fall's first freeze usually shows up around 09/23, roughly 125 days after the last spring frost.
Presque Isle sits in USDA Zone 4b (-25 to -20°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 4 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 05/19 isn't a guarantee
05/19 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/03 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/02 and only about 1 year in 10 sees frost after that.
Presque Isle against the rest of the dataset
About 125 days separate Presque Isle's last and first frost, putting it 38,753 of 40,283 ZIP codes nationally. Within ME, it ranks 434 of 456.
Learn more
Two guides worth reading on 04763: zone vs. frost date, on why Zone 4b and Presque Isle's frost date answer different questions, and the frost range, on how to read the range around Presque Isle's dates instead of trusting one.