Mossyrock, WA 98533 Frost Dates
When can you plant in Mossyrock, WA?
Typically, the last spring freeze lands around 04/07, roughly 222 days out. The first fall frost typically arrives around 11/13, about 215 frost-free days later.
Zone 8b (15 to 20°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 Mossyrock, not a forecast for this year.
What to do before the first frost
About 11 weeks of growing season left in Mossyrock before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 04/07 isn't a guarantee
04/07 is the middle of 30 years of NOAA records, not a promise. Plant by 03/16 and you're betting against frost in roughly 9 years out of 10. 05/08 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Mossyrock compares
About 215 days separate Mossyrock's last and first frost, putting it 14,148 of 40,283 ZIP codes nationally. Within WA, it ranks 256 of 700.
Learn more
the frost range covers how to read the range around Mossyrock's dates instead of trusting one. local microclimates covers what one yard in Mossyrock can differ from the 98533 normal.