Dunes City, OR 97493 Frost Dates
When can you plant in Dunes City, OR?
Around 02/15 is the usual last spring frost, about 171 days away. The first fall frost typically arrives around 12/09, about 306 frost-free days later.
Dunes City sits in USDA Zone 9a (20 to 25°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 15 weeks of growing season left in Dunes City before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Dunes City's last frost
02/15 is the middle of 30 years of NOAA records, not a promise. Plant by 03/19 and you're betting against frost in roughly 9 years out of 10. 12/23 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Dunes City compares
About 306 days separate Dunes City's last and first frost, putting it 3,714 of 40,283 ZIP codes nationally. Within OR, it ranks 11 of 463.
Learn more
local microclimates covers what one yard in Dunes City can differ from the 97493 normal. zone vs. frost date covers why Zone 9a and Dunes City's frost date answer different questions.