Auburn, ME 04243 Frost Dates
Frost dates for Auburn, ME, ZIP 04243
Typically, the last spring freeze lands around 04/25, roughly 240 days out. The first fall frost typically arrives around 10/19, about 177 frost-free days later.
Auburn sits in USDA Zone 5b (-15 to -10°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.
What to do before the first frost
Zone 5b around Auburn has about 7 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 04/25 isn't a guarantee
04/25 is the middle of 30 years of NOAA records, not a promise. Plant by 04/11 and you're betting against frost in roughly 9 years out of 10. 05/06 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Auburn compares
About 177 days separate Auburn's last and first frost, putting it 26,038 of 40,283 ZIP codes nationally. Within ME, it ranks 29 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 04243 normal.