Nashua, NH 03060 Frost Dates
03060, near Nashua, NH: the frost window
Typically, the last spring freeze lands around 04/29, roughly 244 days out. Fall's first freeze usually shows up around 10/08, roughly 162 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Nashua 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
Nashua's growing season runs out in roughly 6 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
The actual range around Nashua's last frost
04/29 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/16 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/11 and only about 1 year in 10 sees frost after that.
Nashua against the rest of the dataset
About 162 days separate Nashua's last and first frost, putting it 31,578 of 40,283 ZIP codes nationally. Within NH, it ranks 40 of 260.
Learn more
Two guides worth reading on 03060: local microclimates, on what one yard in Nashua can differ from the 03060 normal, and zone vs. frost date, on why Zone 6a and Nashua's frost date answer different questions.