Friday Harbor, WA 98261 Frost Dates
Frost dates for Friday Harbor, WA, ZIP 98261
Typically, the last spring freeze lands around 02/26, roughly 182 days out. The first fall frost typically arrives around 11/29, about 276 frost-free days later.
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.
What to do before the first frost
Zone 9a around Friday Harbor has about 13 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
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 5,102 of 40,283 ZIP codes nationally. Within WA, it ranks 5 of 700.
Learn more
the frost range explains how to read the range around Friday Harbor's dates instead of trusting one, and local microclimates explains what one yard in Friday Harbor can differ from the 98261 normal.