Friday Harbor, WA 98245 Frost Dates
When can you plant in Friday Harbor, WA?
The last spring frost here typically falls around 02/26, about 182 days from today. The first fall frost typically arrives around 11/29, about 276 frost-free days later.
The USDA Plant Hardiness Zone Map puts Friday Harbor in Zone 9a (20 to 25°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 13 weeks of growing season left in Friday Harbor before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Friday Harbor's last frost
02/26 is the middle of 30 years of NOAA records, not a promise. Plant by 01/23 and you're betting against frost in roughly 9 years out of 10. 03/23 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Friday Harbor compares
About 276 days separate Friday Harbor's last and first frost, putting it 5,100 of 40,283 ZIP codes nationally. Within WA, it ranks 3 of 700.
Learn more
local microclimates covers what one yard in Friday Harbor can differ from the 98245 normal. zone vs. frost date covers why Zone 9a and Friday Harbor's frost date answer different questions.