Beaverton, OR 97007 Frost Dates
Frost dates for Beaverton, OR, ZIP 97007
Around 02/11 is the usual last spring frost, about 167 days away. The first fall frost typically arrives around 12/05, about 303 frost-free days later.
Zone 8b (15 to 20°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 Beaverton, not a forecast for this year.
What to do before the first frost
Zone 8b around Beaverton has about 14 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.
Why 02/11 isn't a guarantee
02/11 is the middle of 30 years of NOAA records, not a promise. Plant by 03/05 and you're betting against frost in roughly 9 years out of 10. 12/26 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Beaverton compares
About 303 days separate Beaverton's last and first frost, putting it 3,771 of 40,283 ZIP codes nationally. Within OR, it ranks 18 of 463.
Learn more
local microclimates explains what one yard in Beaverton can differ from the 97007 normal, and zone vs. frost date explains why Zone 8b and Beaverton's frost date answer different questions.