Leavenworth, WA 98847 Frost Dates
Leavenworth, WA: when does the frost end?
The last spring frost here typically falls around 05/22, about 267 days from today. Fall's first freeze usually shows up around 09/22, roughly 121 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 Leavenworth, not a forecast for this year.
Stretching the season past the first frost
With roughly 4 weeks until Leavenworth's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
05/22 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/02 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/13 and only about 1 year in 10 sees frost after that.
Leavenworth against the rest of the dataset
At roughly 121 frost-free days, Leavenworth places 39,008 of 40,283 ZIP codes in this dataset. Within WA, it ranks 651 of 700.
Learn more
Before leaning on 98847's figures: the frost range explains how to read the range around Leavenworth's dates instead of trusting one, while local microclimates explains what one yard in Leavenworth can differ from the 98847 normal.