Amesbury, MA 01985 Frost Dates
Amesbury, MA: when does the frost end?
Around 05/03 is the usual last spring frost, about 248 days away. Fall's first freeze usually shows up around 10/08, roughly 158 days after the last spring frost.
Amesbury sits in USDA Zone 6b (-5 to 0°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
With roughly 6 weeks until Amesbury's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 05/03 isn't a guarantee
05/03 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/22 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/17 and only about 1 year in 10 sees frost after that.
Amesbury against the rest of the dataset
Amesbury's growing season runs about 158 days, ranking 32,928 of 40,283 US ZIP codes measured here, longest to shortest. Within MA, it ranks 584 of 712.
Learn more
Before leaning on 01985's figures: local microclimates explains what one yard in Amesbury can differ from the 01985 normal, while zone vs. frost date explains why Zone 6b and Amesbury's frost date answer different questions.