Manchester, NH 03032 Frost Dates
When can you plant in Manchester, NH?
Typically, the last spring freeze lands around 04/30, roughly 245 days out. The first fall frost typically arrives around 10/11, about 164 frost-free days later.
Manchester 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 Manchester 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
04/30 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. 05/14 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Manchester compares
At roughly 164 frost-free days, Manchester places 30,815 of 40,283 ZIP codes in this dataset. Within NH, it ranks 28 of 260.
Learn more
local microclimates covers what one yard in Manchester can differ from the 03032 normal. zone vs. frost date covers why Zone 6a and Manchester's frost date answer different questions.