Rockland, ME 04547 Frost Dates
Frost dates for Rockland, ME, ZIP 04547
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.
Rockland sits in USDA Zone 6a (-10 to -5°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
What to do before the first frost
Zone 6a 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 25,663 of 40,283 ZIP codes in this dataset. Within ME, it ranks 4 of 456.
Learn more
zone vs. frost date explains why Zone 6a and Rockland's frost date answer different questions, and the frost range explains how to read the range around Rockland's dates instead of trusting one.