Port Republic, NJ 08240 Frost Dates
Frost dates for Port Republic, NJ, ZIP 08240
Typically, the last spring freeze lands around 04/18, roughly 233 days out. The first fall frost typically arrives around 10/29, about 190 frost-free days later.
The USDA Plant Hardiness Zone Map puts Port Republic in Zone 7a (0 to 5°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
Zone 7a around Port Republic has about 9 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.
How much risk comes with planting early here
04/18 is the middle of 30 years of NOAA records, not a promise. Plant by 04/02 and you're betting against frost in roughly 9 years out of 10. 05/05 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Port Republic compares
Port Republic's growing season runs about 190 days, ranking 21,227 of 40,283 US ZIP codes measured here, longest to shortest. Within NJ, it ranks 593 of 906.
Learn more
local microclimates explains what one yard in Port Republic can differ from the 08240 normal, and zone vs. frost date explains why Zone 7a and Port Republic's frost date answer different questions.