Friday Harbor, WA 98280 Frost Dates
98280, near Friday Harbor, WA: the frost window
The last spring frost here typically falls around 02/26, about 182 days from today. Fall's first freeze usually shows up around 11/29, roughly 276 days after the last spring frost.
Friday Harbor sits in USDA Zone 9a (20 to 25°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
Friday Harbor's growing season runs out in roughly 13 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
How much risk comes with planting early here
02/26 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 01/23 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 03/23 and only about 1 year in 10 sees frost after that.
Friday Harbor against the rest of the dataset
At roughly 276 frost-free days, Friday Harbor places 5,104 of 40,283 ZIP codes in this dataset. Within WA, it ranks 7 of 700.
Learn more
Two guides worth reading on 98280: local microclimates, on what one yard in Friday Harbor can differ from the 98280 normal, and zone vs. frost date, on why Zone 9a and Friday Harbor's frost date answer different questions.