Lewiston, ME 04252 Frost Dates
Frost dates for Lewiston, ME, ZIP 04252
Typically, the last spring freeze lands around 05/02, roughly 247 days out. The first fall frost typically arrives around 10/10, about 160 frost-free days later.
Zone 5b (-15 to -10°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 Lewiston, not a forecast for this year.
What to do before the first frost
Zone 5b around Lewiston has about 6 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.
The actual range around Lewiston's last frost
05/02 is the middle of 30 years of NOAA records, not a promise. Plant by 04/24 and you're betting against frost in roughly 9 years out of 10. 05/14 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Lewiston compares
About 160 days separate Lewiston's last and first frost, putting it 32,230 of 40,283 ZIP codes nationally. Within ME, it ranks 148 of 456.
Learn more
local microclimates explains what one yard in Lewiston can differ from the 04252 normal, and zone vs. frost date explains why Zone 5b and Lewiston's frost date answer different questions.