Cave Junction, OR 97531 Frost Dates
Frost dates for Cave Junction, OR, ZIP 97531
Typically, the last spring freeze lands around 05/16, roughly 261 days out. The first fall frost typically arrives around 10/30, about 164 frost-free days later.
The USDA Plant Hardiness Zone Map puts Cave Junction in Zone 8b (15 to 20°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 8b around Cave Junction 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
05/16 is the middle of 30 years of NOAA records, not a promise. Plant by 04/23 and you're betting against frost in roughly 9 years out of 10. 06/07 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Cave Junction compares
Cave Junction's growing season runs about 164 days, ranking 30,994 of 40,283 US ZIP codes measured here, longest to shortest. Within OR, it ranks 331 of 463.
Learn more
local microclimates explains what one yard in Cave Junction can differ from the 97531 normal, and zone vs. frost date explains why Zone 8b and Cave Junction's frost date answer different questions.