Leavenworth, WA 98826 Frost Dates
When can you plant in Leavenworth, WA?
Around 05/22 is the usual last spring frost, about 267 days away. The first fall frost typically arrives around 09/22, about 121 frost-free days later.
The USDA Plant Hardiness Zone Map puts Leavenworth 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 4 weeks of growing season left in Leavenworth before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
How much risk comes with planting early here
05/22 is the middle of 30 years of NOAA records, not a promise. Plant by 05/02 and you're betting against frost in roughly 9 years out of 10. 06/13 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Leavenworth compares
At roughly 121 frost-free days, Leavenworth places 39,007 of 40,283 ZIP codes in this dataset. Within WA, it ranks 650 of 700.
Learn more
local microclimates covers what one yard in Leavenworth can differ from the 98826 normal. zone vs. frost date covers why Zone 7a and Leavenworth's frost date answer different questions.