Yakima, WA 98908 Frost Dates
Frost dates for Yakima, WA, ZIP 98908
Typically, the last spring freeze lands around 04/08, roughly 223 days out. The first fall frost typically arrives around 10/23, about 196 frost-free days later.
The USDA Plant Hardiness Zone Map puts Yakima in Zone 7a (0 to 5°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 7a around Yakima has about 8 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 Yakima's last frost
04/08 is the middle of 30 years of NOAA records, not a promise. Plant by 03/23 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 Yakima compares
About 196 days separate Yakima's last and first frost, putting it 18,904 of 40,283 ZIP codes nationally. Within WA, it ranks 343 of 700.
Learn more
local microclimates explains what one yard in Yakima can differ from the 98908 normal, and zone vs. frost date explains why Zone 7a and Yakima's frost date answer different questions.