Leominster, MA 01510 Frost Dates
Leominster, MA: when does the frost end?
Typically, the last spring freeze lands around 04/29, roughly 244 days out. Fall's first freeze usually shows up around 10/11, roughly 164 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 Leominster, not a forecast for this year.
Stretching the season past the first frost
With roughly 6 weeks until Leominster's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Leominster's last frost
04/29 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/19 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/13 and only about 1 year in 10 sees frost after that.
Leominster against the rest of the dataset
About 164 days separate Leominster's last and first frost, putting it 30,840 of 40,283 ZIP codes nationally. Within MA, it ranks 426 of 712.
Learn more
Before leaning on 01510's figures: local microclimates explains what one yard in Leominster can differ from the 01510 normal, while zone vs. frost date explains why Zone 6a and Leominster's frost date answer different questions.