Manchester, NH 03034 Frost Dates
Frost dates for Manchester, NH, ZIP 03034
The last spring frost here typically falls around 04/30, about 245 days from today. 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
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
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
Manchester's growing season runs about 164 days, ranking 30,816 of 40,283 US ZIP codes measured here, longest to shortest. Within NH, it ranks 29 of 260.
Learn more
zone vs. frost date explains why Zone 6a and Manchester's frost date answer different questions, and the frost range explains how to read the range around Manchester's dates instead of trusting one.