Sedro-Woolley, WA 98235 Frost Dates
When can you plant in Sedro-Woolley, WA?
Typically, the last spring freeze lands around 03/27, roughly 211 days out. The first fall frost typically arrives around 11/06, about 224 frost-free days later.
Sedro-Woolley sits in USDA Zone 8b (15 to 20°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
About 10 weeks of growing season left in Sedro-Woolley before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Sedro-Woolley's last frost
03/27 is the middle of 30 years of NOAA records, not a promise. Plant by 03/08 and you're betting against frost in roughly 9 years out of 10. 04/17 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Sedro-Woolley compares
About 224 days separate Sedro-Woolley's last and first frost, putting it 11,784 of 40,283 ZIP codes nationally. Within WA, it ranks 213 of 700.
Learn more
the frost range covers how to read the range around Sedro-Woolley's dates instead of trusting one. local microclimates covers what one yard in Sedro-Woolley can differ from the 98235 normal.