Brewer, ME 04474 Frost Dates
Frost dates for Brewer, ME, ZIP 04474
Around 05/04 is the usual last spring frost, about 249 days away. The first fall frost typically arrives around 10/04, about 152 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 Brewer, not a forecast for this year.
What to do before the first frost
Zone 5a around Brewer 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.
How much risk comes with planting early here
05/04 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. 05/17 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Brewer compares
About 152 days separate Brewer's last and first frost, putting it 34,714 of 40,283 ZIP codes nationally. Within ME, it ranks 229 of 456.
Learn more
local microclimates explains what one yard in Brewer can differ from the 04474 normal, and zone vs. frost date explains why Zone 5a and Brewer's frost date answer different questions.