Cusick, WA 99180 Frost Dates
99180, near Cusick, WA: the frost window
The last spring frost here typically falls around 05/12, about 257 days from today. Fall's first freeze usually shows up around 09/21, roughly 130 days after the last spring frost.
Cusick sits in USDA Zone 6a (-10 to -5°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
Stretching the season past the first frost
Cusick's growing season runs out in roughly 3 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
The actual range around Cusick's last frost
05/12 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/28 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/29 and only about 1 year in 10 sees frost after that.
Cusick against the rest of the dataset
At roughly 130 frost-free days, Cusick places 38,418 of 40,283 ZIP codes in this dataset. Within WA, it ranks 641 of 700.
Learn more
Two guides worth reading on 99180: local microclimates, on what one yard in Cusick can differ from the 99180 normal, and zone vs. frost date, on why Zone 6a and Cusick's frost date answer different questions.