Auburn, ME 04219 Frost Dates
04219, near Auburn, ME: the frost window
The last spring frost here typically falls around 05/12, about 257 days from today. Fall's first freeze usually shows up around 09/29, roughly 139 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Auburn in Zone 5a (-20 to -15°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
Auburn's growing season runs out in roughly 5 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 05/12 isn't a guarantee
05/12 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/30 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/27 and only about 1 year in 10 sees frost after that.
Auburn against the rest of the dataset
About 139 days separate Auburn's last and first frost, putting it 37,208 of 40,283 ZIP codes nationally. Within ME, it ranks 362 of 456.
Learn more
Two guides worth reading on 04219: local microclimates, on what one yard in Auburn can differ from the 04219 normal, and zone vs. frost date, on why Zone 5a and Auburn's frost date answer different questions.