Spokane Valley, WA 99216 Frost Dates
When can you plant in Spokane Valley, WA?
Around 04/26 is the usual last spring frost, about 241 days away. The first fall frost typically arrives around 10/15, about 170 frost-free days later.
The USDA Plant Hardiness Zone Map puts Spokane Valley 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
About 7 weeks of growing season left in Spokane Valley before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Spokane Valley's last frost
04/26 is the middle of 30 years of NOAA records, not a promise. Plant by 04/10 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 Valley compares
Spokane Valley's growing season runs about 170 days, ranking 28,872 of 40,283 US ZIP codes measured here, longest to shortest. Within WA, it ranks 496 of 700.
Learn more
zone vs. frost date covers why Zone 7a and Spokane Valley's frost date answer different questions. the frost range covers how to read the range around Spokane Valley's dates instead of trusting one.