Upper Saddle River, NJ 07458 Frost Dates
07458, near Upper Saddle River, NJ: the frost window
Typically, the last spring freeze lands around 04/19, roughly 234 days out. Fall's first freeze usually shows up around 10/23, roughly 188 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 Upper Saddle River, not a forecast for this year.
Stretching the season past the first frost
Upper Saddle River's growing season runs out in roughly 8 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 Upper Saddle River's last frost
04/19 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/05 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/03 and only about 1 year in 10 sees frost after that.
Upper Saddle River against the rest of the dataset
Upper Saddle River's growing season runs about 188 days, ranking 21,938 of 40,283 US ZIP codes measured here, longest to shortest. Within NJ, it ranks 676 of 906.
Learn more
Two guides worth reading on 07458: zone vs. frost date, on why Zone 7a and Upper Saddle River's frost date answer different questions, and the frost range, on how to read the range around Upper Saddle River's dates instead of trusting one.