Bangor, ME 04419 Frost Dates
Bangor, ME: when does the frost end?
Typically, the last spring freeze lands around 05/04, roughly 249 days out. Fall's first freeze usually shows up around 10/04, roughly 152 days after the last spring frost.
Zone 5a (-20 to -15°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 Bangor, not a forecast for this year.
Stretching the season past the first frost
With roughly 5 weeks until Bangor's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Bangor's last frost
05/04 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/24 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/17 and only about 1 year in 10 sees frost after that.
Bangor against the rest of the dataset
Bangor's growing season runs about 152 days, ranking 34,693 of 40,283 US ZIP codes measured here, longest to shortest. Within ME, it ranks 222 of 456.
Learn more
Before leaning on 04419's figures: local microclimates explains what one yard in Bangor can differ from the 04419 normal, while zone vs. frost date explains why Zone 5a and Bangor's frost date answer different questions.