Yamhill, OR 97148 Frost Dates
When can you plant in Yamhill, OR?
Around 04/05 is the usual last spring frost, about 220 days away. The first fall frost typically arrives around 11/07, about 216 frost-free days later.
Yamhill sits in USDA Zone 8b (15 to 20°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
What to do before the first frost
About 10 weeks of growing season left in Yamhill before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
How much risk comes with planting early here
04/05 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. 04/27 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Yamhill compares
About 216 days separate Yamhill's last and first frost, putting it 13,852 of 40,283 ZIP codes nationally. Within OR, it ranks 187 of 463.
Learn more
local microclimates covers what one yard in Yamhill can differ from the 97148 normal. zone vs. frost date covers why Zone 8b and Yamhill's frost date answer different questions.