Washougal, WA 97292 Frost Dates
Frost dates for Washougal, WA, ZIP 97292
Around 03/16 is the usual last spring frost, about 200 days away. The first fall frost typically arrives around 11/20, about 250 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 Washougal, not a forecast for this year.
What to do before the first frost
Zone 9a around Washougal 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.
The actual range around Washougal's last frost
03/16 is the middle of 30 years of NOAA records, not a promise. Plant by 02/18 and you're betting against frost in roughly 9 years out of 10. 04/12 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Washougal compares
At roughly 250 frost-free days, Washougal places 7,494 of 40,283 ZIP codes in this dataset. Within WA, it ranks 114 of 700.
Learn more
local microclimates explains what one yard in Washougal can differ from the 97292 normal, and zone vs. frost date explains why Zone 9a and Washougal's frost date answer different questions.