Manchester, NH 03070 Frost Dates
Frost dates for Manchester, NH, ZIP 03070
The last spring frost here typically falls around 05/02, about 247 days from today. The first fall frost typically arrives around 10/08, about 158 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
Zone 6a around Manchester has about 6 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
The actual range around Manchester's last frost
05/02 is the middle of 30 years of NOAA records, not a promise. Plant by 04/22 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 158 frost-free days, Manchester places 32,864 of 40,283 ZIP codes in this dataset. Within NH, it ranks 71 of 260.
Learn more
local microclimates explains what one yard in Manchester can differ from the 03070 normal, and zone vs. frost date explains why Zone 6a and Manchester's frost date answer different questions.