Boonton, NJ 07034 Frost Dates
Boonton, NJ: when does the frost end?
Around 04/17 is the usual last spring frost, about 232 days away. Fall's first freeze usually shows up around 10/23, roughly 189 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 Boonton, not a forecast for this year.
Stretching the season past the first frost
With roughly 8 weeks until Boonton'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
04/17 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/04 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/05 and only about 1 year in 10 sees frost after that.
Boonton against the rest of the dataset
About 189 days separate Boonton's last and first frost, putting it 21,483 of 40,283 ZIP codes nationally. Within NJ, it ranks 623 of 906.
Learn more
Before leaning on 07034's figures: zone vs. frost date explains why Zone 7a and Boonton's frost date answer different questions, while the frost range explains how to read the range around Boonton's dates instead of trusting one.