Coquille, OR 97423 Frost Dates
Frost dates for Coquille, OR, ZIP 97423
Around 03/28 is the usual last spring frost, about 212 days away. The first fall frost typically arrives around 11/06, about 225 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 Coquille, not a forecast for this year.
What to do before the first frost
Zone 9a around Coquille has about 10 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
03/28 is the middle of 30 years of NOAA records, not a promise. Plant by 02/22 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 Coquille compares
Coquille's growing season runs about 225 days, ranking 11,406 of 40,283 US ZIP codes measured here, longest to shortest. Within OR, it ranks 154 of 463.
Learn more
local microclimates explains what one yard in Coquille can differ from the 97423 normal, and zone vs. frost date explains why Zone 9a and Coquille's frost date answer different questions.