Leominster, MA 01561 Frost Dates
Leominster, MA: when does the frost end?
The last spring frost here typically falls around 04/29, about 244 days from today. Fall's first freeze usually shows up around 10/11, roughly 164 days after the last spring frost.
Leominster 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 Leominster's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 04/29 isn't a guarantee
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
Leominster's growing season runs about 164 days, ranking 30,842 of 40,283 US ZIP codes measured here, longest to shortest. Within MA, it ranks 428 of 712.
Learn more
Before leaning on 01561's figures: the frost range explains how to read the range around Leominster's dates instead of trusting one, while local microclimates explains what one yard in Leominster can differ from the 01561 normal.