Allentown, NJ 08501 Frost Dates
Frost dates for Allentown, NJ, ZIP 08501
The last spring frost here typically falls around 04/25, about 240 days from today. The first fall frost typically arrives around 10/16, about 173 frost-free days later.
Allentown sits in USDA Zone 7a (0 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.
What to do before the first frost
Zone 7a around Allentown has about 7 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
The actual range around Allentown's last frost
04/25 is the middle of 30 years of NOAA records, not a promise. Plant by 04/12 and you're betting against frost in roughly 9 years out of 10. 05/12 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Allentown compares
Allentown's growing season runs about 173 days, ranking 27,950 of 40,283 US ZIP codes measured here, longest to shortest. Within NJ, it ranks 846 of 906.
Learn more
the frost range explains how to read the range around Allentown's dates instead of trusting one, and local microclimates explains what one yard in Allentown can differ from the 08501 normal.