Hallowell, ME 04336 Frost Dates
When can you plant in Hallowell, ME?
Typically, the last spring freeze lands around 04/27, roughly 242 days out. The first fall frost typically arrives around 10/16, about 172 frost-free days later.
Hallowell sits in USDA Zone 5b (-15 to -10°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.
What to do before the first frost
About 7 weeks of growing season left in Hallowell before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 04/27 isn't a guarantee
04/27 is the middle of 30 years of NOAA records, not a promise. Plant by 04/15 and you're betting against frost in roughly 9 years out of 10. 05/07 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Hallowell compares
Hallowell's growing season runs about 172 days, ranking 28,313 of 40,283 US ZIP codes measured here, longest to shortest. Within ME, it ranks 111 of 456.
Learn more
local microclimates covers what one yard in Hallowell can differ from the 04336 normal. zone vs. frost date covers why Zone 5b and Hallowell's frost date answer different questions.