Wapato, WA 98951 Frost Dates
Frost dates for Wapato, WA, ZIP 98951
The last spring frost here typically falls around 05/08, about 253 days from today. The first fall frost typically arrives around 10/04, about 149 frost-free days later.
Zone 7a (0 to 5°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 Wapato, not a forecast for this year.
What to do before the first frost
Zone 7a around Wapato has about 5 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
05/08 is the middle of 30 years of NOAA records, not a promise. Plant by 04/24 and you're betting against frost in roughly 9 years out of 10. 05/27 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Wapato compares
About 149 days separate Wapato's last and first frost, putting it 35,517 of 40,283 ZIP codes nationally. Within WA, it ranks 604 of 700.
Learn more
local microclimates explains what one yard in Wapato can differ from the 98951 normal, and zone vs. frost date explains why Zone 7a and Wapato's frost date answer different questions.