Manchester, NH 03053 Frost Dates
03053, near Manchester, NH: the frost window
Around 04/21 is the usual last spring frost, about 236 days away. Fall's first freeze usually shows up around 10/19, roughly 180 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Manchester in Zone 6a (-10 to -5°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
Manchester's growing season runs out in roughly 7 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
How much risk comes with planting early here
04/21 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/08 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/06 and only about 1 year in 10 sees frost after that.
Manchester against the rest of the dataset
About 180 days separate Manchester's last and first frost, putting it 24,755 of 40,283 ZIP codes nationally. Within NH, it ranks 1 of 260.
Learn more
Two guides worth reading on 03053: the frost range, on how to read the range around Manchester's dates instead of trusting one, and local microclimates, on what one yard in Manchester can differ from the 03053 normal.