Ilwaco, WA 98624 Frost Dates
When can you plant in Ilwaco, WA?
The last spring frost here typically falls around 04/06, about 221 days from today. The first fall frost typically arrives around 10/26, about 200 frost-free days later.
The USDA Plant Hardiness Zone Map puts Ilwaco in Zone 9a (20 to 25°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
About 8 weeks of growing season left in Ilwaco before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 04/06 isn't a guarantee
04/06 is the middle of 30 years of NOAA records, not a promise. Plant by 03/16 and you're betting against frost in roughly 9 years out of 10. 04/28 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Ilwaco compares
About 200 days separate Ilwaco's last and first frost, putting it 17,852 of 40,283 ZIP codes nationally. Within WA, it ranks 330 of 700.
Learn more
the frost range covers how to read the range around Ilwaco's dates instead of trusting one. local microclimates covers what one yard in Ilwaco can differ from the 98624 normal.