Bath, ME 04008 Frost Dates
Bath, ME: when does the frost end?
The last spring frost here typically falls around 05/10, about 255 days from today. Fall's first freeze usually shows up around 10/06, roughly 149 days after the last spring frost.
Zone 5b (-15 to -10°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 Bath, not a forecast for this year.
Stretching the season past the first frost
With roughly 6 weeks until Bath's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Bath's last frost
05/10 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/28 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.
Bath against the rest of the dataset
About 149 days separate Bath's last and first frost, putting it 35,507 of 40,283 ZIP codes nationally. Within ME, it ranks 282 of 456.
Learn more
Before leaning on 04008's figures: local microclimates explains what one yard in Bath can differ from the 04008 normal, while zone vs. frost date explains why Zone 5b and Bath's frost date answer different questions.