Lambertville, NJ 08530 Frost Dates
Lambertville, NJ: when does the frost end?
Around 04/16 is the usual last spring frost, about 231 days away. Fall's first freeze usually shows up around 10/19, roughly 185 days after the last spring frost.
Zone 7a (0 to 5°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Lambertville, not a forecast for this year.
Stretching the season past the first frost
With roughly 7 weeks until Lambertville's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
04/16 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/02 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/30 and only about 1 year in 10 sees frost after that.
Lambertville against the rest of the dataset
At roughly 185 frost-free days, Lambertville places 23,147 of 40,283 ZIP codes in this dataset. Within NJ, it ranks 715 of 906.
Learn more
Before leaning on 08530's figures: zone vs. frost date explains why Zone 7a and Lambertville's frost date answer different questions, while the frost range explains how to read the range around Lambertville's dates instead of trusting one.