Port Orford, OR 97450 Frost Dates
Frost dates for Port Orford, OR, ZIP 97450
The last spring frost here typically falls around 03/16, about 200 days from today. The first fall frost typically arrives around 11/29, about 258 frost-free days later.
Zone 9a (20 to 25°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 Port Orford, not a forecast for this year.
What to do before the first frost
Zone 9a around Port Orford has about 13 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
03/16 is the middle of 30 years of NOAA records, not a promise. Plant by 02/06 and you're betting against frost in roughly 9 years out of 10. 04/15 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Port Orford compares
About 258 days separate Port Orford's last and first frost, putting it 6,653 of 40,283 ZIP codes nationally. Within OR, it ranks 42 of 463.
Learn more
local microclimates explains what one yard in Port Orford can differ from the 97450 normal, and zone vs. frost date explains why Zone 9a and Port Orford's frost date answer different questions.