Amesbury, MA 03842 Frost Dates
Amesbury, MA: when does the frost end?
Typically, the last spring freeze lands around 05/04, roughly 249 days out. Fall's first freeze usually shows up around 10/08, roughly 157 days after the last spring frost.
Zone 6a (-10 to -5°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Amesbury, not a forecast for this year.
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.
The actual range around Amesbury's last frost
05/04 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/23 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/18 and only about 1 year in 10 sees frost after that.
Amesbury against the rest of the dataset
At roughly 157 frost-free days, Amesbury places 33,249 of 40,283 ZIP codes in this dataset. Within MA, it ranks 597 of 712.
Learn more
Before leaning on 03842's figures: zone vs. frost date explains why Zone 6a and Amesbury's frost date answer different questions, while the frost range explains how to read the range around Amesbury's dates instead of trusting one.