Bath, ME 04011 Frost Dates
04011, near Bath, ME: the frost window
Around 05/02 is the usual last spring frost, about 247 days away. Fall's first freeze usually shows up around 10/10, roughly 160 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Bath in Zone 5b (-15 to -10°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's 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.
The actual range around Bath's last frost
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
At roughly 160 frost-free days, Bath places 32,275 of 40,283 ZIP codes in this dataset. Within ME, it ranks 149 of 456.
Learn more
Two guides worth reading on 04011: the frost range, on how to read the range around Bath's dates instead of trusting one, and local microclimates, on what one yard in Bath can differ from the 04011 normal.