Woodway, WA 98346 Frost Dates
Frost dates for Woodway, WA, ZIP 98346
The last spring frost here typically falls around 03/09, about 193 days from today. The first fall frost typically arrives around 11/17, about 250 frost-free days later.
The USDA Plant Hardiness Zone Map puts Woodway 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
Zone 9a around Woodway has about 12 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
03/09 is the middle of 30 years of NOAA records, not a promise. Plant by 02/15 and you're betting against frost in roughly 9 years out of 10. 03/29 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Woodway compares
About 250 days separate Woodway's last and first frost, putting it 7,555 of 40,283 ZIP codes nationally. Within WA, it ranks 127 of 700.
Learn more
local microclimates explains what one yard in Woodway can differ from the 98346 normal, and zone vs. frost date explains why Zone 9a and Woodway's frost date answer different questions.