Caribou, ME 04766 Frost Dates
When can you plant in Caribou, ME?
Around 05/07 is the usual last spring frost, about 252 days away. The first fall frost typically arrives around 10/01, about 143 frost-free days later.
Zone 4a (-30 to -25°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 Caribou, not a forecast for this year.
What to do before the first frost
About 5 weeks of growing season left in Caribou before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Caribou's last frost
05/07 is the middle of 30 years of NOAA records, not a promise. Plant by 04/27 and you're betting against frost in roughly 9 years out of 10. 05/24 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Caribou compares
At roughly 143 frost-free days, Caribou places 36,519 of 40,283 ZIP codes in this dataset. Within ME, it ranks 352 of 456.
Learn more
the frost range covers how to read the range around Caribou's dates instead of trusting one. local microclimates covers what one yard in Caribou can differ from the 04766 normal.