Hallowell, ME 04344 Frost Dates
Hallowell, ME: when does the frost end?
Around 05/01 is the usual last spring frost, about 246 days away. Fall's first freeze usually shows up around 10/11, roughly 163 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Hallowell in Zone 5b (-15 to -10°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
With roughly 6 weeks until Hallowell's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Hallowell's last frost
05/01 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/20 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/14 and only about 1 year in 10 sees frost after that.
Hallowell against the rest of the dataset
Hallowell's growing season runs about 163 days, ranking 31,400 of 40,283 US ZIP codes measured here, longest to shortest. Within ME, it ranks 145 of 456.
Learn more
Before leaning on 04344's figures: local microclimates explains what one yard in Hallowell can differ from the 04344 normal, while zone vs. frost date explains why Zone 5b and Hallowell's frost date answer different questions.