Rockland, ME 04841 Frost Dates
Rockland, ME: when does the frost end?
Around 04/27 is the usual last spring frost, about 242 days away. 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 6a (-10 to -5°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.
How much risk comes with planting early here
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
Rockland's growing season runs about 175 days, ranking 26,855 of 40,283 US ZIP codes measured here, longest to shortest. Within ME, it ranks 65 of 456.
Learn more
Before leaning on 04841's figures: zone vs. frost date explains why Zone 6a and Rockland's frost date answer different questions, while the frost range explains how to read the range around Rockland's dates instead of trusting one.