Old Town, ME 04451 Frost Dates
Frost dates for Old Town, ME, ZIP 04451
The last spring frost here typically falls around 05/25, about 270 days from today. The first fall frost typically arrives around 09/24, about 119 frost-free days later.
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 Old Town, not a forecast for this year.
What to do before the first frost
Zone 5a around Old Town has about 4 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
How much risk comes with planting early here
05/25 is the middle of 30 years of NOAA records, not a promise. Plant by 05/10 and you're betting against frost in roughly 9 years out of 10. 06/08 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Old Town compares
Old Town's growing season runs about 119 days, ranking 39,135 of 40,283 US ZIP codes measured here, longest to shortest. Within ME, it ranks 441 of 456.
Learn more
local microclimates explains what one yard in Old Town can differ from the 04451 normal, and zone vs. frost date explains why Zone 5a and Old Town's frost date answer different questions.