Spokane, WA 99210 Frost Dates
Frost dates for Spokane, WA, ZIP 99210
The last spring frost here typically falls around 04/26, about 241 days from today. The first fall frost typically arrives around 10/12, about 168 frost-free days later.
The USDA Plant Hardiness Zone Map puts Spokane 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 Spokane has about 6 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.
Why 04/26 isn't a guarantee
04/26 is the middle of 30 years of NOAA records, not a promise. Plant by 04/09 and you're betting against frost in roughly 9 years out of 10. 05/10 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Spokane compares
Spokane's growing season runs about 168 days, ranking 29,643 of 40,283 US ZIP codes measured here, longest to shortest. Within WA, it ranks 532 of 700.
Learn more
local microclimates explains what one yard in Spokane can differ from the 99210 normal, and zone vs. frost date explains why Zone 7a and Spokane's frost date answer different questions.