Old Town, ME 04402 Frost Dates
Frost dates for Old Town, ME, ZIP 04402
Typically, the last spring freeze lands around 05/17, roughly 262 days out. The first fall frost typically arrives around 09/29, about 133 frost-free days later.
The USDA Plant Hardiness Zone Map puts Old Town in Zone 5a (-20 to -15°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
Zone 5a around Old Town has about 5 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
05/17 is the middle of 30 years of NOAA records, not a promise. Plant by 05/01 and you're betting against frost in roughly 9 years out of 10. 05/31 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Old Town compares
At roughly 133 frost-free days, Old Town places 38,049 of 40,283 ZIP codes in this dataset. Within ME, it ranks 409 of 456.
Learn more
the frost range explains how to read the range around Old Town's dates instead of trusting one, and local microclimates explains what one yard in Old Town can differ from the 04402 normal.