Rockland, ME 04863 Frost Dates
Rockland, ME: when does the frost end?
Typically, the last spring freeze lands around 04/27, roughly 242 days out. Fall's first freeze usually shows up around 10/19, roughly 175 days after the last spring frost.
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.
Stretching the season past the first frost
With roughly 7 weeks until Rockland's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Rockland's last frost
04/27 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/17 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/09 and only about 1 year in 10 sees frost after that.
Rockland against the rest of the dataset
At roughly 175 frost-free days, Rockland places 26,861 of 40,283 ZIP codes in this dataset. Within ME, it ranks 71 of 456.
Learn more
Before leaning on 04863's figures: local microclimates explains what one yard in Rockland can differ from the 04863 normal, while zone vs. frost date explains why Zone 6b and Rockland's frost date answer different questions.