Concrete, WA 98237 Frost Dates
When can you plant in Concrete, WA?
Typically, the last spring freeze lands around 03/28, roughly 212 days out. The first fall frost typically arrives around 11/14, about 229 frost-free days later.
Concrete sits in USDA Zone 8a (10 to 15°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 11 weeks of growing season left in Concrete before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Concrete's last frost
03/28 is the middle of 30 years of NOAA records, not a promise. Plant by 03/07 and you're betting against frost in roughly 9 years out of 10. 04/19 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Concrete compares
At roughly 229 frost-free days, Concrete places 10,635 of 40,283 ZIP codes in this dataset. Within WA, it ranks 180 of 700.
Learn more
local microclimates covers what one yard in Concrete can differ from the 98237 normal. zone vs. frost date covers why Zone 8a and Concrete's frost date answer different questions.