Old Town, ME 04473 Frost Dates
Frost dates for Old Town, ME, ZIP 04473
Typically, the last spring freeze lands around 05/01, roughly 246 days out. The first fall frost typically arrives around 10/06, about 157 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 6 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.
The actual range around Old Town's last frost
05/01 is the middle of 30 years of NOAA records, not a promise. Plant by 04/22 and you're betting against frost in roughly 9 years out of 10. 05/14 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Old Town compares
At roughly 157 frost-free days, Old Town places 33,295 of 40,283 ZIP codes in this dataset. Within ME, it ranks 193 of 456.
Learn more
local microclimates explains what one yard in Old Town can differ from the 04473 normal, and zone vs. frost date explains why Zone 5a and Old Town's frost date answer different questions.