Concord, NH 03046 Frost Dates
Concord, NH: when does the frost end?
Typically, the last spring freeze lands around 05/02, roughly 247 days out. Fall's first freeze usually shows up around 10/08, roughly 158 days after the last spring frost.
Concord 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.
Stretching the season past the first frost
With roughly 6 weeks until Concord's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Concord's last frost
05/02 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/22 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/14 and only about 1 year in 10 sees frost after that.
Concord against the rest of the dataset
At roughly 158 frost-free days, Concord places 32,890 of 40,283 ZIP codes in this dataset. Within NH, it ranks 72 of 260.
Learn more
Before leaning on 03046's figures: local microclimates explains what one yard in Concord can differ from the 03046 normal, while zone vs. frost date explains why Zone 6a and Concord's frost date answer different questions.