Ogdensburg, NJ 07871 Frost Dates
07871, near Ogdensburg, NJ: the frost window
Around 04/25 is the usual last spring frost, about 240 days away. Fall's first freeze usually shows up around 10/19, roughly 175 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Ogdensburg in Zone 6b (-5 to 0°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
Ogdensburg'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.
Why 04/25 isn't a guarantee
04/25 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/12 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.
Ogdensburg against the rest of the dataset
Ogdensburg's growing season runs about 175 days, ranking 26,964 of 40,283 US ZIP codes measured here, longest to shortest. Within NJ, it ranks 824 of 906.
Learn more
Two guides worth reading on 07871: zone vs. frost date, on why Zone 6b and Ogdensburg's frost date answer different questions, and the frost range, on how to read the range around Ogdensburg's dates instead of trusting one.