Bath, ME 04539 Frost Dates
When can you plant in Bath, ME?
Around 04/27 is the usual last spring frost, about 242 days away. The first fall frost typically arrives around 10/18, about 172 frost-free days later.
Bath sits in USDA Zone 6a (-10 to -5°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
About 7 weeks of growing season left in Bath before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Bath's last frost
04/27 is the middle of 30 years of NOAA records, not a promise. Plant by 04/16 and you're betting against frost in roughly 9 years out of 10. 05/10 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Bath compares
At roughly 172 frost-free days, Bath places 28,236 of 40,283 ZIP codes in this dataset. Within ME, it ranks 99 of 456.
Learn more
local microclimates covers what one yard in Bath can differ from the 04539 normal. zone vs. frost date covers why Zone 6a and Bath's frost date answer different questions.