Rockland, ME 04860 Frost Dates
Frost dates for Rockland, ME, ZIP 04860
Around 04/27 is the usual last spring frost, about 242 days away. The first fall frost typically arrives around 10/25, about 178 frost-free days later.
The USDA Plant Hardiness Zone Map puts Rockland in Zone 6b (-5 to 0°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
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.
Why 04/27 isn't a guarantee
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 25,671 of 40,283 ZIP codes in this dataset. Within ME, it ranks 12 of 456.
Learn more
the frost range explains how to read the range around Rockland's dates instead of trusting one, and local microclimates explains what one yard in Rockland can differ from the 04860 normal.