Bath, ME 04565 Frost Dates
04565, near Bath, ME: the frost window
Typically, the last spring freeze lands around 05/02, roughly 247 days out. Fall's first freeze usually shows up around 10/10, roughly 160 days after the last spring frost.
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.
Stretching the season past the first frost
Bath's growing season runs out in roughly 6 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
05/02 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/24 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/14 and only about 1 year in 10 sees frost after that.
Bath against the rest of the dataset
About 160 days separate Bath's last and first frost, putting it 32,279 of 40,283 ZIP codes nationally. Within ME, it ranks 153 of 456.
Learn more
Two guides worth reading on 04565: zone vs. frost date, on why Zone 6a and Bath's frost date answer different questions, and the frost range, on how to read the range around Bath's dates instead of trusting one.