Old Town, ME 04427 Frost Dates
Old Town, ME: when does the frost end?
Typically, the last spring freeze lands around 05/08, roughly 253 days out. Fall's first freeze usually shows up around 10/03, roughly 148 days after the last spring frost.
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.
Stretching the season past the first frost
With roughly 5 weeks until Old Town's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
05/08 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/27 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/23 and only about 1 year in 10 sees frost after that.
Old Town against the rest of the dataset
At roughly 148 frost-free days, Old Town places 35,700 of 40,283 ZIP codes in this dataset. Within ME, it ranks 320 of 456.
Learn more
Before leaning on 04427's figures: local microclimates explains what one yard in Old Town can differ from the 04427 normal, while zone vs. frost date explains why Zone 5a and Old Town's frost date answer different questions.