Rockland, ME 04855 Frost Dates
Frost dates for Rockland, ME, ZIP 04855
The last spring frost here typically falls around 04/27, about 242 days from today. The first fall frost typically arrives around 10/25, about 178 frost-free days later.
Zone 6b (-5 to 0°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 Rockland, not a forecast for this year.
What to do before the first frost
Zone 6b around Rockland has about 8 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 Rockland's last frost
04/27 is the middle of 30 years of NOAA records, not a promise. Plant by 04/17 and you're betting against frost in roughly 9 years out of 10. 05/08 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Rockland compares
At roughly 178 frost-free days, Rockland places 25,668 of 40,283 ZIP codes in this dataset. Within ME, it ranks 9 of 456.
Learn more
local microclimates explains what one yard in Rockland can differ from the 04855 normal, and zone vs. frost date explains why Zone 6b and Rockland's frost date answer different questions.