Old Town, ME 04418 Frost Dates
04418, near Old Town, ME: the frost window
The last spring frost here typically falls around 05/13, about 258 days from today. Fall's first freeze usually shows up around 09/28, roughly 137 days after the last spring frost.
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.
Stretching the season past the first frost
Old Town's growing season runs out in roughly 4 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
How much risk comes with planting early here
05/13 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/30 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/28 and only about 1 year in 10 sees frost after that.
Old Town against the rest of the dataset
About 137 days separate Old Town's last and first frost, putting it 37,499 of 40,283 ZIP codes nationally. Within ME, it ranks 380 of 456.
Learn more
Two guides worth reading on 04418: local microclimates, on what one yard in Old Town can differ from the 04418 normal, and zone vs. frost date, on why Zone 5a and Old Town's frost date answer different questions.