West Linn, OR 97068 Frost Dates
Frost dates for West Linn, OR, ZIP 97068
The last spring frost here typically falls around 03/16, about 200 days from today. The first fall frost typically arrives around 11/14, about 242 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 West Linn, not a forecast for this year.
What to do before the first frost
Zone 9a around West Linn has about 11 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 West Linn's last frost
03/16 is the middle of 30 years of NOAA records, not a promise. Plant by 02/21 and you're betting against frost in roughly 9 years out of 10. 04/07 is the safer bet, historically only a 1-in-10 chance of frost that late.
How West Linn compares
At roughly 242 frost-free days, West Linn places 8,351 of 40,283 ZIP codes in this dataset. Within OR, it ranks 110 of 463.
Learn more
local microclimates explains what one yard in West Linn can differ from the 97068 normal, and zone vs. frost date explains why Zone 9a and West Linn's frost date answer different questions.