Old Town, ME 04406 Frost Dates
Frost dates for Old Town, ME, ZIP 04406
Around 05/06 is the usual last spring frost, about 251 days away. The first fall frost typically arrives around 10/07, about 153 frost-free days later.
Old Town sits in USDA Zone 5a (-20 to -15°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
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.
Why 05/06 isn't a guarantee
05/06 is the middle of 30 years of NOAA records, not a promise. Plant by 04/25 and you're betting against frost in roughly 9 years out of 10. 05/20 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 153 days, ranking 34,503 of 40,283 US ZIP codes measured here, longest to shortest. Within ME, it ranks 206 of 456.
Learn more
local microclimates explains what one yard in Old Town can differ from the 04406 normal, and zone vs. frost date explains why Zone 5a and Old Town's frost date answer different questions.