Leominster, MA 01432 Frost Dates
When can you plant in Leominster, MA?
Around 04/29 is the usual last spring frost, about 244 days away. The first fall frost typically arrives around 10/11, about 164 frost-free days later.
Leominster 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.
What to do before the first frost
About 6 weeks of growing season left in Leominster before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
How much risk comes with planting early here
04/29 is the middle of 30 years of NOAA records, not a promise. Plant by 04/19 and you're betting against frost in roughly 9 years out of 10. 05/13 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Leominster compares
Leominster's growing season runs about 164 days, ranking 30,833 of 40,283 US ZIP codes measured here, longest to shortest. Within MA, it ranks 419 of 712.
Learn more
zone vs. frost date covers why Zone 6a and Leominster's frost date answer different questions. the frost range covers how to read the range around Leominster's dates instead of trusting one.