Brier, WA 98036 Frost Dates
When can you plant in Brier, WA?
Typically, the last spring freeze lands around 03/09, roughly 193 days out. The first fall frost typically arrives around 11/17, about 250 frost-free days later.
Zone 9a (20 to 25°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Brier, not a forecast for this year.
What to do before the first frost
About 12 weeks of growing season left in Brier before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Brier's last frost
03/09 is the middle of 30 years of NOAA records, not a promise. Plant by 02/15 and you're betting against frost in roughly 9 years out of 10. 03/29 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Brier compares
At roughly 250 frost-free days, Brier places 7,525 of 40,283 ZIP codes in this dataset. Within WA, it ranks 125 of 700.
Learn more
local microclimates covers what one yard in Brier can differ from the 98036 normal. zone vs. frost date covers why Zone 9a and Brier's frost date answer different questions.