Auburn, ME 04009 Frost Dates
Frost dates for Auburn, ME, ZIP 04009
Typically, the last spring freeze lands around 05/05, roughly 250 days out. The first fall frost typically arrives around 10/05, about 151 frost-free days later.
Zone 5a (-20 to -15°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 Auburn, not a forecast for this year.
What to do before the first frost
Zone 5a around Auburn has about 5 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
Why 05/05 isn't a guarantee
05/05 is the middle of 30 years of NOAA records, not a promise. Plant by 04/26 and you're betting against frost in roughly 9 years out of 10. 05/17 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Auburn compares
At roughly 151 frost-free days, Auburn places 34,950 of 40,283 ZIP codes in this dataset. Within ME, it ranks 244 of 456.
Learn more
the frost range explains how to read the range around Auburn's dates instead of trusting one, and local microclimates explains what one yard in Auburn can differ from the 04009 normal.