Rockland, ME 04681 Frost Dates
04681, near Rockland, ME: the frost window
The last spring frost here typically falls around 05/07, about 252 days from today. Fall's first freeze usually shows up around 10/05, roughly 151 days after the last spring frost.
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.
Stretching the season past the first frost
Rockland's growing season runs out in roughly 5 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 05/07 isn't a guarantee
05/07 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/28 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/21 and only about 1 year in 10 sees frost after that.
Rockland against the rest of the dataset
About 151 days separate Rockland's last and first frost, putting it 34,979 of 40,283 ZIP codes nationally. Within ME, it ranks 251 of 456.
Learn more
Two guides worth reading on 04681: zone vs. frost date, on why Zone 6a and Rockland's frost date answer different questions, and the frost range, on how to read the range around Rockland's dates instead of trusting one.