Spokane, WA 99228 Frost Dates
Spokane, WA: when does the frost end?
The last spring frost here typically falls around 04/26, about 241 days from today. Fall's first freeze usually shows up around 10/12, roughly 168 days after the last spring frost.
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 Spokane, not a forecast for this year.
Stretching the season past the first frost
With roughly 6 weeks until Spokane's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 04/26 isn't a guarantee
04/26 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/09 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/10 and only about 1 year in 10 sees frost after that.
Spokane against the rest of the dataset
At roughly 168 frost-free days, Spokane places 29,650 of 40,283 ZIP codes in this dataset. Within WA, it ranks 539 of 700.
Learn more
Before leaning on 99228's figures: the frost range explains how to read the range around Spokane's dates instead of trusting one, while local microclimates explains what one yard in Spokane can differ from the 99228 normal.